1 | // -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
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2 | /*****************************************************************************\ |
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3 | * Computer Algebra System SINGULAR |
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4 | \*****************************************************************************/ |
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5 | /** @file syzextra.cc |
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6 | * |
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7 | * New implementations for the computation of syzygies and resolutions |
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8 | * |
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9 | * ABSTRACT: Computation of Syzygies due to Schreyer |
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10 | * |
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11 | * @author Oleksandr Motsak |
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12 | * |
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13 | **/ |
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14 | /*****************************************************************************/ |
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15 | |
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16 | // include header file |
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17 | #include <kernel/mod2.h> |
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18 | |
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19 | #include "syzextra.h" |
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20 | |
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21 | #include "DebugPrint.h" |
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22 | |
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23 | #include <omalloc/omalloc.h> |
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24 | |
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25 | #include <misc/intvec.h> |
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26 | #include <misc/options.h> |
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27 | |
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28 | #include <coeffs/coeffs.h> |
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29 | |
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30 | #include <polys/monomials/p_polys.h> |
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31 | #include <polys/monomials/ring.h> |
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32 | #include <polys/simpleideals.h> |
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33 | |
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34 | #include <polys/kbuckets.h> // for kBucket* |
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35 | #include <polys/sbuckets.h> // for sBucket* |
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36 | //#include <polys/nc/summator.h> // for CPolynomialSummator |
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37 | #include <polys/operations/p_Mult_q.h> // for MIN_LENGTH_BUCKET |
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38 | |
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39 | #include <kernel/GBEngine/kstd1.h> |
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40 | #include <kernel/polys.h> |
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41 | #include <kernel/GBEngine/syz.h> |
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42 | #include <kernel/ideals.h> |
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43 | |
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44 | #include <kernel/oswrapper/timer.h> |
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45 | |
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46 | |
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47 | #include <Singular/tok.h> |
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48 | #include <Singular/ipid.h> |
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49 | #include <Singular/lists.h> |
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50 | #include <Singular/attrib.h> |
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51 | |
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52 | #include <Singular/ipid.h> |
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53 | #include <Singular/ipshell.h> // For iiAddCproc |
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54 | |
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55 | #include <stdio.h> |
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56 | #include <stdlib.h> |
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57 | #include <string.h> |
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58 | |
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59 | // USING_NAMESPACE_SINGULARXX; |
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60 | USING_NAMESPACE( SINGULARXXNAME :: DEBUG ) |
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61 | |
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62 | |
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63 | BEGIN_NAMESPACE_SINGULARXX BEGIN_NAMESPACE(SYZEXTRA) |
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64 | |
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65 | |
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66 | BEGIN_NAMESPACE_NONAME |
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67 | |
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68 | static inline poly pp_Add_qq( const poly a, const poly b, const ring R) |
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69 | { |
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70 | return p_Add_q( p_Copy(a, R), p_Copy(b, R), R ); |
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71 | } |
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72 | |
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73 | static inline poly p_VectorProductLT( poly s, const ideal& L, const ideal& T, const ring& R) |
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74 | { |
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75 | assume( IDELEMS(L) == IDELEMS(T) ); |
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76 | poly vp = NULL; // resulting vector product |
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77 | |
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78 | while( s != NULL ) |
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79 | { |
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80 | const poly nxt = pNext(s); |
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81 | pNext(s) = NULL; |
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82 | |
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83 | if( !n_IsZero( p_GetCoeff(s, R), R) ) |
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84 | { |
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85 | const int i = p_GetComp(s, R) - 1; |
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86 | assume( i >= 0 ); assume( i < IDELEMS(L) ); |
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87 | p_SetComp(s, 0, R); p_SetmComp(s, R); |
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88 | |
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89 | vp = p_Add_q( vp, pp_Mult_qq( s, L->m[i], R ), R); |
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90 | vp = p_Add_q( vp, pp_Mult_qq( s, T->m[i], R ), R); |
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91 | } |
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92 | |
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93 | p_Delete(&s, R); |
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94 | |
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95 | s = nxt; |
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96 | }; |
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97 | |
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98 | assume( s == NULL ); |
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99 | |
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100 | return vp; |
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101 | } |
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102 | |
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103 | static inline int atGetInt(idhdl rootRingHdl, const char* attribute, long def) |
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104 | { |
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105 | return ((int)(long)(atGet(rootRingHdl, attribute, INT_CMD, (void*)def))); |
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106 | } |
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107 | |
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108 | END_NAMESPACE |
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109 | |
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110 | BEGIN_NAMESPACE(SORT_c_ds) |
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111 | |
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112 | #if (defined(HAVE_QSORT_R) && (defined __APPLE__ || defined __MACH__ || defined __DARWIN__ || defined __FreeBSD__ || defined __BSD__ || defined OpenBSD3_1 || defined OpenBSD3_9)) |
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113 | static int cmp_c_ds(void *R, const void *p1, const void *p2){ |
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114 | #elif (defined(HAVE_QSORT_R) && (defined _GNU_SOURCE || defined __GNU__ || defined __linux__)) |
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115 | static int cmp_c_ds(const void *p1, const void *p2, void *R){ |
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116 | #else |
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117 | static int cmp_c_ds(const void *p1, const void *p2){ void *R = currRing; |
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118 | #endif |
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119 | assume(R != NULL); |
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120 | const int YES = 1; |
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121 | const int NO = -1; |
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122 | |
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123 | const ring r = (const ring) R; // TODO/NOTE: the structure is known: C, lp!!! |
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124 | |
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125 | assume( r == currRing ); // for now... |
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126 | |
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127 | const poly a = *(const poly*)p1; |
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128 | const poly b = *(const poly*)p2; |
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129 | |
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130 | assume( a != NULL ); |
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131 | assume( b != NULL ); |
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132 | |
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133 | p_LmTest(a, r); |
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134 | p_LmTest(b, r); |
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135 | |
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136 | |
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137 | const signed long iCompDiff = p_GetComp(a, r) - p_GetComp(b, r); |
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138 | |
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139 | // TODO: test this!!!!!!!!!!!!!!!! |
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140 | |
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141 | //return -( compare (c, qsorts) ) |
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142 | |
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143 | #ifndef SING_NDEBUG |
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144 | const int __DEBUG__ = 0; |
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145 | if( __DEBUG__ ) |
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146 | { |
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147 | PrintS("cmp_c_ds: a, b: \np1: "); dPrint(a, r, r, 2); |
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148 | PrintS("b: "); dPrint(b, r, r, 2); |
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149 | PrintLn(); |
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150 | } |
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151 | #endif |
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152 | |
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153 | |
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154 | if( iCompDiff > 0 ) |
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155 | return YES; |
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156 | |
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157 | if( iCompDiff < 0 ) |
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158 | return NO; |
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159 | |
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160 | assume( iCompDiff == 0 ); |
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161 | |
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162 | const signed long iDegDiff = p_Totaldegree(a, r) - p_Totaldegree(b, r); |
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163 | |
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164 | if( iDegDiff > 0 ) |
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165 | return YES; |
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166 | |
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167 | if( iDegDiff < 0 ) |
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168 | return NO; |
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169 | |
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170 | assume( iDegDiff == 0 ); |
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171 | |
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172 | #ifndef SING_NDEBUG |
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173 | if( __DEBUG__ ) |
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174 | { |
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175 | PrintS("cmp_c_ds: a & b have the same comp & deg! "); PrintLn(); |
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176 | } |
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177 | #endif |
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178 | |
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179 | for (int v = rVar(r); v > 0; v--) |
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180 | { |
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181 | assume( v > 0 ); |
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182 | assume( v <= rVar(r) ); |
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183 | |
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184 | const signed int d = p_GetExp(a, v, r) - p_GetExp(b, v, r); |
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185 | |
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186 | if( d > 0 ) |
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187 | return YES; |
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188 | |
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189 | if( d < 0 ) |
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190 | return NO; |
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191 | |
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192 | assume( d == 0 ); |
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193 | } |
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194 | |
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195 | return 0; |
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196 | } |
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197 | |
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198 | /* |
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199 | static int cmp_poly(const poly &a, const poly &b) |
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200 | { |
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201 | const int YES = 1; |
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202 | const int NO = -1; |
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203 | |
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204 | const ring r = (const ring) currRing; // TODO/NOTE: the structure is known: C, lp!!! |
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205 | |
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206 | assume( r == currRing ); |
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207 | |
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208 | assume( a != NULL ); |
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209 | assume( b != NULL ); |
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210 | |
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211 | p_LmTest(a, r); |
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212 | p_LmTest(b, r); |
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213 | assume( p_GetComp(a, r) == 0 ); |
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214 | assume( p_GetComp(b, r) == 0 ); |
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215 | |
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216 | #ifndef SING_NDEBUG |
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217 | const int __DEBUG__ = 0; |
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218 | if( __DEBUG__ ) |
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219 | { |
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220 | PrintS("cmp_lex: a, b: \np1: "); dPrint(a, r, r, 2); |
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221 | PrintS("b: "); dPrint(b, r, r, 2); |
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222 | PrintLn(); |
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223 | } |
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224 | #endif |
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225 | |
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226 | for (int v = rVar(r); v > 0; v--) |
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227 | { |
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228 | assume( v > 0 ); |
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229 | assume( v <= rVar(r) ); |
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230 | |
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231 | const signed int d = p_GetExp(a, v, r) - p_GetExp(b, v, r); |
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232 | |
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233 | if( d > 0 ) |
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234 | return YES; |
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235 | |
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236 | if( d < 0 ) |
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237 | return NO; |
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238 | |
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239 | assume( d == 0 ); |
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240 | } |
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241 | |
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242 | return 0; |
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243 | } |
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244 | */ |
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245 | |
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246 | END_NAMESPACE |
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247 | /* namespace SORT_c_ds */ |
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248 | |
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249 | /// writes a monomial (p), |
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250 | /// uses form x*gen(.) if ko != coloumn number of p |
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251 | static void writeLatexTerm(const poly t, const ring r, const bool bCurrSyz = true, const bool bLTonly = true) |
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252 | { |
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253 | if( t == NULL ) |
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254 | { |
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255 | PrintS(" 0 "); |
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256 | return; |
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257 | } |
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258 | |
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259 | assume( r != NULL ); |
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260 | const coeffs C = r->cf; assume(C != NULL); |
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261 | |
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262 | poly p = t; |
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263 | BOOLEAN writePlus = FALSE; |
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264 | |
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265 | do { |
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266 | assume( p != NULL ); |
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267 | |
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268 | // write coef... |
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269 | number& n = p_GetCoeff(p, r); |
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270 | |
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271 | n_Normalize(n, C); |
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272 | |
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273 | BOOLEAN writeMult = FALSE; ///< needs * before pp or module generator |
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274 | |
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275 | BOOLEAN writeOne = FALSE; ///< need to write something after '-'! |
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276 | |
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277 | if( n_IsZero(n, C) ) |
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278 | { |
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279 | PrintS( writePlus? " + 0" : " 0 " ); writePlus = TRUE; writeMult = TRUE; |
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280 | // return; // yes? |
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281 | } |
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282 | |
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283 | if (n_IsMOne(n, C)) |
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284 | { |
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285 | PrintS(" - "); writeOne = TRUE; writePlus = FALSE; |
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286 | } |
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287 | else if (!n_IsOne(n, C)) |
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288 | { |
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289 | if( writePlus && n_GreaterZero(n, C) ) |
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290 | PrintS(" + "); |
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291 | |
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292 | StringSetS(""); n_WriteLong(n, C); |
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293 | if (true) |
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294 | { |
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295 | char *s = StringEndS(); PrintS(s); omFree(s); |
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296 | } |
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297 | |
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298 | |
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299 | writeMult = TRUE; |
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300 | writePlus = TRUE; |
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301 | } else |
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302 | writeOne = TRUE; |
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303 | |
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304 | // missing '1' if no PP and gen...!? |
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305 | // write monom... |
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306 | const short N = rVar(r); |
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307 | |
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308 | BOOLEAN wrotePP = FALSE; ///< needs * before module generator? |
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309 | |
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310 | for (short i = 0; i < N; i++) |
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311 | { |
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312 | const long ee = p_GetExp(p, i+1, r); |
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313 | |
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314 | if (ee!=0L) |
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315 | { |
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316 | if (writeMult) |
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317 | { |
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318 | PrintS(" "); |
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319 | writeMult = FALSE; |
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320 | } else |
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321 | if( writePlus ) |
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322 | PrintS(" + "); |
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323 | |
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324 | writePlus = FALSE; |
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325 | |
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326 | if (ee != 1L) |
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327 | Print(" %s^{%ld} ", rRingVar(i, r), ee); |
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328 | else |
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329 | Print(" %s ", rRingVar(i, r)); |
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330 | |
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331 | writeOne = FALSE; |
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332 | wrotePP = TRUE; |
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333 | } |
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334 | } |
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335 | |
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336 | writePlus = writePlus || wrotePP; |
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337 | writeMult = writeMult || wrotePP; |
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338 | |
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339 | // write module gen... |
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340 | const long comp = p_GetComp(p, r); |
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341 | |
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342 | if (comp > 0 ) |
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343 | { |
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344 | if (writeMult) |
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345 | PrintS(" "); |
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346 | else |
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347 | if( writePlus ) |
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348 | PrintS(" + "); |
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349 | |
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350 | if (bCurrSyz) |
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351 | Print(" \\\\GEN{%ld} ", comp); |
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352 | else |
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353 | Print(" \\\\GENP{%ld} ", comp); |
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354 | |
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355 | writeOne = FALSE; |
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356 | } |
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357 | |
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358 | if ( writeOne ) |
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359 | PrintS( writePlus? " + 1 " : " 1 " ); |
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360 | |
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361 | |
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362 | pIter(p); |
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363 | |
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364 | writePlus = TRUE; |
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365 | } while( (!bLTonly) && (p != NULL) ); |
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366 | |
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367 | } |
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368 | |
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369 | |
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370 | |
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371 | |
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372 | |
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373 | /// return a new term: leading coeff * leading monomial of p |
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374 | /// with 0 leading component! |
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375 | poly leadmonom(const poly p, const ring r, const bool bSetZeroComp) |
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376 | { |
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377 | poly m = NULL; |
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378 | |
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379 | if( p != NULL ) |
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380 | { |
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381 | assume( p != NULL ); |
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382 | p_LmTest(p, r); |
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383 | |
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384 | m = p_LmInit(p, r); |
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385 | p_SetCoeff0(m, n_Copy(p_GetCoeff(p, r), r), r); |
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386 | |
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387 | if( bSetZeroComp ) |
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388 | p_SetComp(m, 0, r); |
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389 | p_Setm(m, r); |
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390 | |
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391 | |
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392 | assume( m != NULL ); |
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393 | assume( pNext(m) == NULL ); |
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394 | p_LmTest(m, r); |
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395 | |
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396 | if( bSetZeroComp ) |
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397 | assume( p_GetComp(m, r) == 0 ); |
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398 | } |
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399 | |
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400 | return m; |
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401 | } |
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402 | |
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403 | |
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404 | |
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405 | poly p_Tail(const poly p, const ring r) |
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406 | { |
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407 | if( p == NULL) |
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408 | return NULL; |
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409 | else |
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410 | return p_Copy( pNext(p), r ); |
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411 | } |
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412 | |
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413 | |
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414 | ideal id_Tail(const ideal id, const ring r) |
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415 | { |
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416 | if( id == NULL) |
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417 | return NULL; |
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418 | |
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419 | const ideal newid = idInit(IDELEMS(id),id->rank); |
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420 | |
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421 | for (int i=IDELEMS(id) - 1; i >= 0; i--) |
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422 | newid->m[i] = p_Tail( id->m[i], r ); |
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423 | |
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424 | newid->rank = id_RankFreeModule(newid, currRing); |
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425 | |
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426 | return newid; |
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427 | } |
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428 | |
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429 | |
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430 | |
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431 | void Sort_c_ds(const ideal id, const ring r) |
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432 | { |
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433 | const int sizeNew = IDELEMS(id); |
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434 | |
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435 | #if ( (defined(HAVE_QSORT_R)) && (defined __APPLE__ || defined __MACH__ || defined __DARWIN__ || defined __FreeBSD__ || defined __BSD__ || defined OpenBSD3_1 || defined OpenBSD3_9) ) |
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436 | #define qsort_my(m, s, ss, r, cmp) qsort_r(m, s, ss, r, cmp) |
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437 | #elif ( (defined(HAVE_QSORT_R)) && (defined _GNU_SOURCE || defined __GNU__ || defined __linux__)) |
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438 | #define qsort_my(m, s, ss, r, cmp) qsort_r(m, s, ss, cmp, r) |
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439 | #else |
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440 | #define qsort_my(m, s, ss, r, cmp) qsort(m, s, ss, cmp) |
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441 | #endif |
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442 | |
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443 | if( sizeNew >= 2 ) |
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444 | qsort_my(id->m, sizeNew, sizeof(poly), r, FROM_NAMESPACE(SORT_c_ds, cmp_c_ds)); |
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445 | |
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446 | #undef qsort_my |
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447 | |
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448 | id->rank = id_RankFreeModule(id, r); |
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449 | } |
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450 | |
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451 | /// Clean up all the accumulated data |
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452 | void SchreyerSyzygyComputation::CleanUp() |
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453 | { |
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454 | extern void id_Delete (ideal*, const ring); |
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455 | |
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456 | id_Delete(const_cast<ideal*>(&m_idTails), m_rBaseRing); // TODO!!! |
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457 | |
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458 | if( m_sum_bucket != NULL ) |
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459 | { |
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460 | sBucketDestroy(&m_sum_bucket); |
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461 | m_sum_bucket = NULL; |
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462 | } |
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463 | |
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464 | if( m_spoly_bucket != NULL ) |
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465 | { |
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466 | kBucketDestroy(&m_spoly_bucket); |
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467 | m_spoly_bucket = NULL; |
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468 | } |
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469 | |
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470 | for( TCache::iterator it = m_cache.begin(); it != m_cache.end(); it++ ) |
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471 | { |
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472 | TP2PCache& T = it->second; |
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473 | |
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474 | for(TP2PCache::iterator vit = T.begin(); vit != T.end(); vit++ ) |
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475 | { |
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476 | p_Delete( (&(vit->second)), m_rBaseRing); |
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477 | p_Delete( const_cast<poly*>(&(vit->first)), m_rBaseRing); |
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478 | } |
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479 | } |
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480 | } |
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481 | /* |
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482 | for( TTailTerms::const_iterator it = m_idTailTerms.begin(); it != m_idTailTerms.end(); it++ ) |
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483 | { |
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484 | const TTail& v = *it; |
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485 | for(TTail::const_iterator vit = v.begin(); vit != v.end(); vit++ ) |
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486 | delete const_cast<CTailTerm*>(*vit); |
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487 | } |
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488 | */ |
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489 | |
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490 | |
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491 | |
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492 | int CReducerFinder::PreProcessTerm(const poly t, CReducerFinder& syzChecker) const |
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493 | { |
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494 | assume( t != NULL ); |
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495 | |
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496 | if( __DEBUG__ & __TAILREDSYZ__ ) |
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497 | assume( !IsDivisible(t) ); // each input term should NOT be in <L> |
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498 | |
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499 | const ring r = m_rBaseRing; |
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500 | |
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501 | |
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502 | if( __TAILREDSYZ__ ) |
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503 | if( p_LmIsConstant(t, r) ) // most basic case of baing coprime with L, whatever that is... |
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504 | return 1; // TODO: prove this...? |
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505 | |
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506 | // return false; // appears to be fine |
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507 | |
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508 | const long comp = p_GetComp(t, r); |
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509 | |
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510 | CReducersHash::const_iterator itr = m_hash.find(comp); |
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511 | |
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512 | if ( itr == m_hash.end() ) |
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513 | return 2; // no such leading component!!! |
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514 | |
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515 | assume( itr->first == comp ); |
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516 | |
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517 | const bool bIdealCase = (comp == 0); |
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518 | const bool bSyzCheck = syzChecker.IsNonempty(); // need to check even in ideal case????? proof? "&& !bIdealCase" |
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519 | |
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520 | if( __TAILREDSYZ__ && (bIdealCase || bSyzCheck) ) |
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521 | { |
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522 | const TReducers& v = itr->second; |
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523 | const int N = rVar(r); |
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524 | // TODO: extract exps of t beforehand?! |
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525 | bool coprime = true; |
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526 | for(TReducers::const_iterator vit = v.begin(); (vit != v.end()) && coprime; ++vit ) |
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527 | { |
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528 | assume( m_L->m[(*vit)->m_label] == (*vit)->m_lt ); |
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529 | |
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530 | const poly p = (*vit)->m_lt; |
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531 | |
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532 | assume( p_GetComp(p, r) == comp ); |
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533 | |
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534 | // TODO: check if coprime with Leads... if __TAILREDSYZ__ ! |
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535 | for( int var = N; var > 0; --var ) |
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536 | if( (p_GetExp(p, var, r) != 0) && (p_GetExp(t, var, r) != 0) ) |
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537 | { |
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538 | #ifndef SING_NDEBUG |
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539 | if( __DEBUG__ | 0) |
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540 | { |
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541 | PrintS("CReducerFinder::PreProcessTerm, 't' is NOT co-prime with the following leading term: \n"); |
---|
542 | dPrint(p, r, r, 1); |
---|
543 | } |
---|
544 | #endif |
---|
545 | coprime = false; // t not coprime with p! |
---|
546 | break; |
---|
547 | } |
---|
548 | |
---|
549 | if( bSyzCheck && coprime ) |
---|
550 | { |
---|
551 | poly ss = p_LmInit(t, r); |
---|
552 | p_SetCoeff0(ss, n_Init(1, r), r); // for delete & printout only!... |
---|
553 | p_SetComp(ss, (*vit)->m_label + 1, r); // coeff? |
---|
554 | p_Setm(ss, r); |
---|
555 | |
---|
556 | coprime = ( syzChecker.IsDivisible(ss) ); |
---|
557 | |
---|
558 | #ifndef SING_NDEBUG |
---|
559 | if( __DEBUG__ && !coprime) |
---|
560 | { |
---|
561 | PrintS("CReducerFinder::PreProcessTerm, 't' is co-prime with p but may lead to NOT divisible syz.term: \n"); |
---|
562 | dPrint(ss, r, r, 1); |
---|
563 | } |
---|
564 | #endif |
---|
565 | |
---|
566 | p_LmDelete(&ss, r); // deletes coeff as well??? |
---|
567 | } |
---|
568 | |
---|
569 | } |
---|
570 | |
---|
571 | #ifndef SING_NDEBUG |
---|
572 | if( __DEBUG__ && coprime ) |
---|
573 | PrintS("CReducerFinder::PreProcessTerm, the following 't' is 'co-prime' with all of leading terms! \n"); |
---|
574 | #endif |
---|
575 | |
---|
576 | return coprime? 3: 0; // t was coprime with all of leading terms!!! |
---|
577 | |
---|
578 | } |
---|
579 | // return true; // delete the term |
---|
580 | |
---|
581 | return 0; |
---|
582 | } |
---|
583 | |
---|
584 | |
---|
585 | void SchreyerSyzygyComputation::SetUpTailTerms() |
---|
586 | { |
---|
587 | const ideal idTails = m_idTails; |
---|
588 | assume( idTails != NULL ); |
---|
589 | assume( idTails->m != NULL ); |
---|
590 | const ring r = m_rBaseRing; |
---|
591 | |
---|
592 | #ifndef SING_NDEBUG |
---|
593 | if( __DEBUG__ | 0) |
---|
594 | { |
---|
595 | PrintS("SchreyerSyzygyComputation::SetUpTailTerms(): Tails: \n"); |
---|
596 | dPrint(idTails, r, r, 0); |
---|
597 | } |
---|
598 | |
---|
599 | unsigned long pp[4] = {0,0,0,0}; // count preprocessed terms... |
---|
600 | #endif |
---|
601 | |
---|
602 | for( int p = IDELEMS(idTails) - 1; p >= 0; --p ) |
---|
603 | for( poly* tt = &(idTails->m[p]); (*tt) != NULL; ) |
---|
604 | { |
---|
605 | const poly t = *tt; |
---|
606 | const int k = m_div.PreProcessTerm(t, m_checker); // 0..3 |
---|
607 | assume( 0 <= k && k <= 3 ); |
---|
608 | |
---|
609 | #ifndef SING_NDEBUG |
---|
610 | pp[k]++; |
---|
611 | #endif |
---|
612 | |
---|
613 | if( k ) |
---|
614 | { |
---|
615 | #ifndef SING_NDEBUG |
---|
616 | if( __DEBUG__) |
---|
617 | { |
---|
618 | Print("SchreyerSyzygyComputation::SetUpTailTerms(): PP (%d) the following TT: \n", k); |
---|
619 | dPrint(t, r, r, 1); |
---|
620 | } |
---|
621 | #endif |
---|
622 | |
---|
623 | (*tt) = p_LmDeleteAndNext(t, r); // delete the lead and next... |
---|
624 | } |
---|
625 | else |
---|
626 | tt = &pNext(t); // go next? |
---|
627 | |
---|
628 | } |
---|
629 | |
---|
630 | #ifndef SING_NDEBUG |
---|
631 | if( !__TREEOUTPUT__ ) |
---|
632 | if( TEST_OPT_PROT | 1) |
---|
633 | Print("%% **!!** SchreyerSyzygyComputation::SetUpTailTerms()::PreProcessing(): X: {c: %lu, C: %lu, P: %lu} + %lu\n", pp[1], pp[2], pp[3], pp[0]); |
---|
634 | #endif |
---|
635 | |
---|
636 | #ifndef SING_NDEBUG |
---|
637 | if( !__TREEOUTPUT__ ) |
---|
638 | if( __DEBUG__ | 0) |
---|
639 | { |
---|
640 | PrintS("SchreyerSyzygyComputation::SetUpTailTerms(): Preprocessed Tails: \n"); |
---|
641 | dPrint(idTails, r, r, 0); |
---|
642 | } |
---|
643 | #endif |
---|
644 | |
---|
645 | } |
---|
646 | /* |
---|
647 | m_idTailTerms.resize( IDELEMS(idTails) ); |
---|
648 | |
---|
649 | for( unsigned int p = IDELEMS(idTails) - 1; p >= 0; p -- ) |
---|
650 | { |
---|
651 | TTail& v = m_idTailTerms[p]; |
---|
652 | poly t = idTails->m[p]; |
---|
653 | v.resize( pLength(t) ); |
---|
654 | |
---|
655 | unsigned int pp = 0; |
---|
656 | |
---|
657 | while( t != NULL ) |
---|
658 | { |
---|
659 | assume( t != NULL ); |
---|
660 | // TODO: compute L:t! |
---|
661 | // ideal reducers; |
---|
662 | // CReducerFinder m_reducers |
---|
663 | |
---|
664 | CTailTerm* d = v[pp] = new CTailTerm(); |
---|
665 | |
---|
666 | ++pp; pIter(t); |
---|
667 | } |
---|
668 | } |
---|
669 | */ |
---|
670 | |
---|
671 | |
---|
672 | |
---|
673 | ideal SchreyerSyzygyComputation::Compute1LeadingSyzygyTerms() |
---|
674 | { |
---|
675 | const ideal& id = m_idLeads; |
---|
676 | const ring& r = m_rBaseRing; |
---|
677 | // const SchreyerSyzygyComputationFlags& attributes = m_atttributes; |
---|
678 | |
---|
679 | assume(!__LEAD2SYZ__); |
---|
680 | |
---|
681 | // 1. set of components S? |
---|
682 | // 2. for each component c from S: set of indices of leading terms |
---|
683 | // with this component? |
---|
684 | // 3. short exp. vectors for each leading term? |
---|
685 | |
---|
686 | const int size = IDELEMS(id); |
---|
687 | |
---|
688 | if( size < 2 ) |
---|
689 | { |
---|
690 | const ideal newid = idInit(1, 0); newid->m[0] = NULL; // zero ideal... |
---|
691 | return newid; |
---|
692 | } |
---|
693 | |
---|
694 | // TODO/NOTE: input is supposed to be (reverse-) sorted wrt "(c,ds)"!?? |
---|
695 | |
---|
696 | // components should come in groups: count elements in each group |
---|
697 | // && estimate the real size!!! |
---|
698 | |
---|
699 | |
---|
700 | // use just a vector instead??? |
---|
701 | const ideal newid = idInit( (size * (size-1))/2, size); // maximal size: ideal case! |
---|
702 | |
---|
703 | int k = 0; |
---|
704 | |
---|
705 | for (int j = 0; j < size; j++) |
---|
706 | { |
---|
707 | const poly p = id->m[j]; |
---|
708 | assume( p != NULL ); |
---|
709 | const int c = p_GetComp(p, r); |
---|
710 | |
---|
711 | for (int i = j - 1; i >= 0; i--) |
---|
712 | { |
---|
713 | const poly pp = id->m[i]; |
---|
714 | assume( pp != NULL ); |
---|
715 | const int cc = p_GetComp(pp, r); |
---|
716 | |
---|
717 | if( c != cc ) |
---|
718 | continue; |
---|
719 | |
---|
720 | const poly m = p_Init(r); // p_New??? |
---|
721 | |
---|
722 | // m = LCM(p, pp) / p! // TODO: optimize: knowing the ring structure: (C/lp)! |
---|
723 | for (int v = rVar(r); v > 0; v--) |
---|
724 | { |
---|
725 | assume( v > 0 ); |
---|
726 | assume( v <= rVar(r) ); |
---|
727 | |
---|
728 | const short e1 = p_GetExp(p , v, r); |
---|
729 | const short e2 = p_GetExp(pp, v, r); |
---|
730 | |
---|
731 | if( e1 >= e2 ) |
---|
732 | p_SetExp(m, v, 0, r); |
---|
733 | else |
---|
734 | p_SetExp(m, v, e2 - e1, r); |
---|
735 | |
---|
736 | } |
---|
737 | |
---|
738 | assume( (j > i) && (i >= 0) ); |
---|
739 | |
---|
740 | p_SetComp(m, j + 1, r); |
---|
741 | pNext(m) = NULL; |
---|
742 | p_SetCoeff0(m, n_Init(1, r->cf), r); // for later... |
---|
743 | |
---|
744 | p_Setm(m, r); // should not do anything!!! |
---|
745 | |
---|
746 | newid->m[k++] = m; |
---|
747 | } |
---|
748 | } |
---|
749 | |
---|
750 | // if( __DEBUG__ && FALSE ) |
---|
751 | // { |
---|
752 | // PrintS("ComputeLeadingSyzygyTerms::Temp0: \n"); |
---|
753 | // dPrint(newid, r, r, 1); |
---|
754 | // } |
---|
755 | |
---|
756 | // the rest of newid is assumed to be zeroes... |
---|
757 | |
---|
758 | // simplify(newid, 2 + 32)?? |
---|
759 | // sort(newid, "C,ds")[1]??? |
---|
760 | id_DelDiv(newid, r); // #define SIMPL_LMDIV 32 |
---|
761 | |
---|
762 | // if( __DEBUG__ && FALSE ) |
---|
763 | // { |
---|
764 | // PrintS("ComputeLeadingSyzygyTerms::Temp1: \n"); |
---|
765 | // dPrint(newid, r, r, 1); |
---|
766 | // } |
---|
767 | |
---|
768 | idSkipZeroes(newid); // #define SIMPL_NULL 2 |
---|
769 | |
---|
770 | // if( __DEBUG__ ) |
---|
771 | // { |
---|
772 | // PrintS("ComputeLeadingSyzygyTerms::Output: \n"); |
---|
773 | // dPrint(newid, r, r, 1); |
---|
774 | // } |
---|
775 | |
---|
776 | Sort_c_ds(newid, r); |
---|
777 | |
---|
778 | return newid; |
---|
779 | } |
---|
780 | |
---|
781 | ideal SchreyerSyzygyComputation::Compute2LeadingSyzygyTerms() |
---|
782 | { |
---|
783 | const ideal& id = m_idLeads; |
---|
784 | const ring& r = m_rBaseRing; |
---|
785 | // const SchreyerSyzygyComputationFlags& attributes = m_atttributes; |
---|
786 | |
---|
787 | // 1. set of components S? |
---|
788 | // 2. for each component c from S: set of indices of leading terms |
---|
789 | // with this component? |
---|
790 | // 3. short exp. vectors for each leading term? |
---|
791 | |
---|
792 | const int size = IDELEMS(id); |
---|
793 | |
---|
794 | if( size < 2 ) |
---|
795 | { |
---|
796 | const ideal newid = idInit(1, 1); newid->m[0] = NULL; // zero module... |
---|
797 | return newid; |
---|
798 | } |
---|
799 | |
---|
800 | |
---|
801 | // TODO/NOTE: input is supposed to be sorted wrt "C,ds"!?? |
---|
802 | |
---|
803 | // components should come in groups: count elements in each group |
---|
804 | // && estimate the real size!!! |
---|
805 | |
---|
806 | |
---|
807 | // use just a vector instead??? |
---|
808 | ideal newid = idInit( (size * (size-1))/2, size); // maximal size: ideal case! |
---|
809 | |
---|
810 | int k = 0; |
---|
811 | |
---|
812 | for (int j = 0; j < size; j++) |
---|
813 | { |
---|
814 | const poly p = id->m[j]; |
---|
815 | assume( p != NULL ); |
---|
816 | const int c = p_GetComp(p, r); |
---|
817 | |
---|
818 | for (int i = j - 1; i >= 0; i--) |
---|
819 | { |
---|
820 | const poly pp = id->m[i]; |
---|
821 | assume( pp != NULL ); |
---|
822 | const int cc = p_GetComp(pp, r); |
---|
823 | |
---|
824 | if( c != cc ) |
---|
825 | continue; |
---|
826 | |
---|
827 | // allocate memory & zero it out! |
---|
828 | const poly m = p_Init(r); const poly mm = p_Init(r); |
---|
829 | |
---|
830 | |
---|
831 | // m = LCM(p, pp) / p! mm = LCM(p, pp) / pp! |
---|
832 | // TODO: optimize: knowing the ring structure: (C/lp)! |
---|
833 | |
---|
834 | for (int v = rVar(r); v > 0; v--) |
---|
835 | { |
---|
836 | assume( v > 0 ); |
---|
837 | assume( v <= rVar(r) ); |
---|
838 | |
---|
839 | const short e1 = p_GetExp(p , v, r); |
---|
840 | const short e2 = p_GetExp(pp, v, r); |
---|
841 | |
---|
842 | if( e1 >= e2 ) |
---|
843 | p_SetExp(mm, v, e1 - e2, r); // p_SetExp(m, v, 0, r); |
---|
844 | else |
---|
845 | p_SetExp(m, v, e2 - e1, r); // p_SetExp(mm, v, 0, r); |
---|
846 | |
---|
847 | } |
---|
848 | |
---|
849 | assume( (j > i) && (i >= 0) ); |
---|
850 | |
---|
851 | p_SetComp(m, j + 1, r); |
---|
852 | p_SetComp(mm, i + 1, r); |
---|
853 | |
---|
854 | const number& lc1 = p_GetCoeff(p , r); |
---|
855 | const number& lc2 = p_GetCoeff(pp, r); |
---|
856 | |
---|
857 | number g = n_Lcm( lc1, lc2, r->cf ); |
---|
858 | |
---|
859 | p_SetCoeff0(m , n_Div(g, lc1, r), r); |
---|
860 | p_SetCoeff0(mm, n_InpNeg(n_Div(g, lc2, r), r), r); |
---|
861 | |
---|
862 | n_Delete(&g, r); |
---|
863 | |
---|
864 | p_Setm(m, r); // should not do anything!!! |
---|
865 | p_Setm(mm, r); // should not do anything!!! |
---|
866 | |
---|
867 | pNext(m) = mm; // pNext(mm) = NULL; |
---|
868 | |
---|
869 | newid->m[k++] = m; |
---|
870 | } |
---|
871 | } |
---|
872 | |
---|
873 | // if( __DEBUG__ && FALSE ) |
---|
874 | // { |
---|
875 | // PrintS("Compute2LeadingSyzygyTerms::Temp0: \n"); |
---|
876 | // dPrint(newid, r, r, 1); |
---|
877 | // } |
---|
878 | |
---|
879 | if( !__TAILREDSYZ__ ) |
---|
880 | { |
---|
881 | // simplify(newid, 2 + 32)?? |
---|
882 | // sort(newid, "C,ds")[1]??? |
---|
883 | id_DelDiv(newid, r); // #define SIMPL_LMDIV 32 |
---|
884 | |
---|
885 | // if( __DEBUG__ && FALSE ) |
---|
886 | // { |
---|
887 | // PrintS("Compute2LeadingSyzygyTerms::Temp1 (deldiv): \n"); |
---|
888 | // dPrint(newid, r, r, 1); |
---|
889 | // } |
---|
890 | } |
---|
891 | else |
---|
892 | { |
---|
893 | // option(redSB); option(redTail); |
---|
894 | // TEST_OPT_REDSB |
---|
895 | // TEST_OPT_REDTAIL |
---|
896 | assume( r == currRing ); |
---|
897 | |
---|
898 | BITSET _save_test; SI_SAVE_OPT1(_save_test); |
---|
899 | SI_RESTORE_OPT1(Sy_bit(OPT_REDTAIL) | Sy_bit(OPT_REDSB) | _save_test); |
---|
900 | |
---|
901 | intvec* w=new intvec(IDELEMS(newid)); |
---|
902 | ideal tmp = kStd(newid, currRing->qideal, isHomog, &w); |
---|
903 | delete w; |
---|
904 | |
---|
905 | SI_RESTORE_OPT1(_save_test) |
---|
906 | |
---|
907 | id_Delete(&newid, r); |
---|
908 | newid = tmp; |
---|
909 | |
---|
910 | // if( __DEBUG__ && FALSE ) |
---|
911 | // { |
---|
912 | // PrintS("Compute2LeadingSyzygyTerms::Temp1 (std): \n"); |
---|
913 | // dPrint(newid, r, r, 1); |
---|
914 | // } |
---|
915 | |
---|
916 | } |
---|
917 | |
---|
918 | idSkipZeroes(newid); |
---|
919 | |
---|
920 | Sort_c_ds(newid, r); |
---|
921 | |
---|
922 | return newid; |
---|
923 | } |
---|
924 | |
---|
925 | poly SchreyerSyzygyComputation::TraverseNF(const poly a, const poly a2) const |
---|
926 | { |
---|
927 | const ideal& L = m_idLeads; |
---|
928 | const ideal& T = m_idTails; |
---|
929 | |
---|
930 | const ring& R = m_rBaseRing; |
---|
931 | |
---|
932 | const int r = p_GetComp(a, R) - 1; |
---|
933 | |
---|
934 | assume( r >= 0 && r < IDELEMS(T) ); |
---|
935 | assume( r >= 0 && r < IDELEMS(L) ); |
---|
936 | |
---|
937 | assume( a != NULL ); |
---|
938 | |
---|
939 | if( __TREEOUTPUT__ ) |
---|
940 | { |
---|
941 | PrintS("{ \"nodelabel\": \""); writeLatexTerm(a, R); PrintS("\", \"children\": ["); |
---|
942 | } |
---|
943 | |
---|
944 | |
---|
945 | poly aa = leadmonom(a, R); assume( aa != NULL); // :( |
---|
946 | |
---|
947 | poly t = TraverseTail(aa, r); |
---|
948 | |
---|
949 | if( a2 != NULL ) |
---|
950 | { |
---|
951 | assume( __LEAD2SYZ__ ); |
---|
952 | |
---|
953 | if( __TREEOUTPUT__ ) |
---|
954 | { |
---|
955 | PrintS("{ \"nodelabel\": \""); writeLatexTerm(a2, R); PrintS("\", \"children\": ["); |
---|
956 | } |
---|
957 | |
---|
958 | // replace the following... ? |
---|
959 | const int r2 = p_GetComp(a2, R) - 1; poly aa2 = leadmonom(a2, R); // :( |
---|
960 | |
---|
961 | assume( r2 >= 0 && r2 < IDELEMS(T) ); |
---|
962 | |
---|
963 | t = p_Add_q(a2, p_Add_q(t, TraverseTail(aa2, r2), R), R); |
---|
964 | |
---|
965 | p_Delete(&aa2, R); |
---|
966 | |
---|
967 | if( __TREEOUTPUT__ ) |
---|
968 | PrintS("]},"); |
---|
969 | |
---|
970 | } else |
---|
971 | t = p_Add_q(t, ReduceTerm(aa, L->m[r], a), R); |
---|
972 | |
---|
973 | p_Delete(&aa, R); |
---|
974 | |
---|
975 | // TODO: print t??? |
---|
976 | |
---|
977 | if( __TREEOUTPUT__ ) |
---|
978 | { |
---|
979 | PrintS("], \"noderesult\": \""); writeLatexTerm(t, R, true, false); PrintS("\" },"); |
---|
980 | } |
---|
981 | return t; |
---|
982 | } |
---|
983 | |
---|
984 | |
---|
985 | void SchreyerSyzygyComputation::ComputeSyzygy() |
---|
986 | { |
---|
987 | assume( m_idLeads != NULL ); |
---|
988 | assume( m_idTails != NULL ); |
---|
989 | |
---|
990 | const ideal& L = m_idLeads; |
---|
991 | const ideal& T = m_idTails; |
---|
992 | |
---|
993 | ideal& TT = m_syzTails; |
---|
994 | const ring& R = m_rBaseRing; |
---|
995 | |
---|
996 | if( m_sum_bucket == NULL ) |
---|
997 | m_sum_bucket = sBucketCreate(R); |
---|
998 | |
---|
999 | if( m_spoly_bucket == NULL ) |
---|
1000 | m_spoly_bucket = kBucketCreate(R); |
---|
1001 | |
---|
1002 | |
---|
1003 | assume( IDELEMS(L) == IDELEMS(T) ); |
---|
1004 | #ifndef SING_NDEBUG |
---|
1005 | int t, r; |
---|
1006 | #endif |
---|
1007 | |
---|
1008 | if( __TREEOUTPUT__ ) |
---|
1009 | { |
---|
1010 | Print("\n{ \"syzygylayer\": \"%d\", \"hybridnf\": \"%d\", \"diagrams\": \n[", __SYZNUMBER__, __HYBRIDNF__ ); |
---|
1011 | } |
---|
1012 | |
---|
1013 | if( m_syzLeads == NULL ) |
---|
1014 | { |
---|
1015 | #ifndef SING_NDEBUG |
---|
1016 | if( !__TREEOUTPUT__ ) |
---|
1017 | if( TEST_OPT_PROT | 1) |
---|
1018 | { |
---|
1019 | t = getTimer(); r = getRTimer(); |
---|
1020 | Print("%% %5d **!TIME4!** SchreyerSyzygyComputation::ComputeSyzygy::ComputeLeadingSyzygyTerms: t: %d, r: %d\n", r, t, r); |
---|
1021 | } |
---|
1022 | #endif |
---|
1023 | ComputeLeadingSyzygyTerms( __LEAD2SYZ__ && !__IGNORETAILS__ ); // 2 terms OR 1 term! |
---|
1024 | #ifndef SING_NDEBUG |
---|
1025 | if( !__TREEOUTPUT__ ) |
---|
1026 | if( TEST_OPT_PROT | 1) |
---|
1027 | { |
---|
1028 | t = getTimer() - t; r = getRTimer() - r; |
---|
1029 | Print("%% %5d **!TIME4!** SchreyerSyzygyComputation::ComputeSyzygy::ComputeLeadingSyzygyTerms: dt: %d, dr: %d\n", getRTimer(), t, r); |
---|
1030 | } |
---|
1031 | #endif |
---|
1032 | |
---|
1033 | } |
---|
1034 | |
---|
1035 | assume( m_syzLeads != NULL ); |
---|
1036 | ideal& LL = m_syzLeads; |
---|
1037 | const int size = IDELEMS(LL); |
---|
1038 | |
---|
1039 | TT = idInit(size, 0); |
---|
1040 | |
---|
1041 | if( size == 1 && LL->m[0] == NULL ) |
---|
1042 | { |
---|
1043 | if( __TREEOUTPUT__ ) |
---|
1044 | PrintS("]},"); |
---|
1045 | return; |
---|
1046 | } |
---|
1047 | |
---|
1048 | |
---|
1049 | // use hybrid method? |
---|
1050 | const bool method = (__HYBRIDNF__ == 1) || (__HYBRIDNF__ == 2 && __SYZNUMBER__ < 3); |
---|
1051 | |
---|
1052 | if( !__IGNORETAILS__) |
---|
1053 | { |
---|
1054 | if( T != NULL ) |
---|
1055 | { |
---|
1056 | #ifndef SING_NDEBUG |
---|
1057 | if( !__TREEOUTPUT__ ) |
---|
1058 | if( TEST_OPT_PROT | 1 ) |
---|
1059 | { |
---|
1060 | t = getTimer(); r = getRTimer(); |
---|
1061 | Print("%% %5d **!TIME4!** SchreyerSyzygyComputation::ComputeSyzygy::SetUpTailTerms(): t: %d, r: %d\n", r, t, r); |
---|
1062 | } |
---|
1063 | #endif |
---|
1064 | |
---|
1065 | SetUpTailTerms(); |
---|
1066 | #ifndef SING_NDEBUG |
---|
1067 | if( !__TREEOUTPUT__ ) |
---|
1068 | if( TEST_OPT_PROT | 1) |
---|
1069 | { |
---|
1070 | t = getTimer() - t; r = getRTimer() - r; |
---|
1071 | Print("%% %5d **!TIME4!** SchreyerSyzygyComputation::ComputeSyzygy::SetUpTailTerms(): dt: %d, dr: %d\n", getRTimer(), t, r); |
---|
1072 | } |
---|
1073 | #endif |
---|
1074 | } |
---|
1075 | } |
---|
1076 | |
---|
1077 | #ifndef SING_NDEBUG |
---|
1078 | if( !__TREEOUTPUT__ ) |
---|
1079 | if( TEST_OPT_PROT | 1) |
---|
1080 | { |
---|
1081 | t = getTimer(); r = getRTimer(); |
---|
1082 | Print("%% %5d **!TIME4!** SchreyerSyzygyComputation::ComputeSyzygy::SyzygyLift: t: %d, r: %d\n", r, t, r); |
---|
1083 | } |
---|
1084 | #endif |
---|
1085 | |
---|
1086 | for( int k = size - 1; k >= 0; k-- ) |
---|
1087 | { |
---|
1088 | const poly a = LL->m[k]; assume( a != NULL ); |
---|
1089 | |
---|
1090 | poly a2 = pNext(a); |
---|
1091 | |
---|
1092 | // Splitting 2-terms Leading syzygy module |
---|
1093 | if( a2 != NULL ) |
---|
1094 | pNext(a) = NULL; |
---|
1095 | |
---|
1096 | if( __IGNORETAILS__ ) |
---|
1097 | { |
---|
1098 | TT->m[k] = NULL; |
---|
1099 | |
---|
1100 | assume( a2 != NULL ); |
---|
1101 | |
---|
1102 | if( a2 != NULL ) |
---|
1103 | p_Delete(&a2, R); |
---|
1104 | |
---|
1105 | continue; |
---|
1106 | } |
---|
1107 | |
---|
1108 | // TT->m[k] = a2; |
---|
1109 | |
---|
1110 | if( method ) |
---|
1111 | TT->m[k] = SchreyerSyzygyNF(a, a2); |
---|
1112 | else |
---|
1113 | TT->m[k] = TraverseNF(a, a2); // TODO: WRONG |
---|
1114 | |
---|
1115 | if( __SYZCHECK__ ) |
---|
1116 | { |
---|
1117 | // TODO: check the correctness (syzygy property): a + TT->m[k] should be a syzygy!!! |
---|
1118 | |
---|
1119 | poly s = pp_Add_qq( a, TT->m[k], R); // current syzygy |
---|
1120 | |
---|
1121 | poly vp = p_VectorProductLT(s, L, T, R); |
---|
1122 | |
---|
1123 | if( (__DEBUG__ | __TREEOUTPUT__) && (vp != NULL) ) |
---|
1124 | { |
---|
1125 | Warn("SchreyerSyzygyComputation::ComputeSyzygy: failed syzygy property for syzygy [%d], non-zero image is as follows: ", k); |
---|
1126 | dPrint(vp, R, R, 0); p_Delete(&vp, R); |
---|
1127 | |
---|
1128 | PrintS("SchreyerSyzygyComputation::ComputeSyzygy: Wrong syzygy is as follows: "); |
---|
1129 | s = pp_Add_qq( a, TT->m[k], R); |
---|
1130 | dPrint(s, R, R, 0); p_Delete(&s, R); |
---|
1131 | |
---|
1132 | PrintS("SchreyerSyzygyComputation::ComputeSyzygy: Testing with the other method"); |
---|
1133 | |
---|
1134 | if( !method ) |
---|
1135 | s = SchreyerSyzygyNF(a, a2); |
---|
1136 | else |
---|
1137 | s = TraverseNF(a, a2); |
---|
1138 | |
---|
1139 | s = p_Add_q( a, s, R); // another syzygy |
---|
1140 | PrintS("SchreyerSyzygyComputation::ComputeSyzygy: The other method gives the following syzygy: "); |
---|
1141 | dPrint(s, R, R, 0); |
---|
1142 | |
---|
1143 | vp = p_VectorProductLT(s, L, T, R); |
---|
1144 | |
---|
1145 | if( vp == NULL ) |
---|
1146 | { |
---|
1147 | PrintS("SchreyerSyzygyComputation::ComputeSyzygy: .... which is correct!!! "); |
---|
1148 | } else |
---|
1149 | { |
---|
1150 | Warn("SchreyerSyzygyComputation::ComputeSyzygy: failed to compute syzygy tail[%d] with both methods!!! Non-zero image (2nd) is as follows: ", k); |
---|
1151 | dPrint(vp, R, R, 0); |
---|
1152 | } |
---|
1153 | |
---|
1154 | } else |
---|
1155 | assume( vp == NULL ); |
---|
1156 | |
---|
1157 | p_Delete(&vp, R); |
---|
1158 | } |
---|
1159 | |
---|
1160 | } |
---|
1161 | |
---|
1162 | #ifndef SING_NDEBUG |
---|
1163 | if( !__TREEOUTPUT__ ) |
---|
1164 | if( TEST_OPT_PROT | 1) |
---|
1165 | { |
---|
1166 | t = getTimer() - t; r = getRTimer() - r; |
---|
1167 | Print("%% %5d **!TIME4!** SchreyerSyzygyComputation::ComputeSyzygy::SyzygyLift: dt: %d, dr: %d\n", getRTimer(), t, r); |
---|
1168 | } |
---|
1169 | #endif |
---|
1170 | |
---|
1171 | TT->rank = id_RankFreeModule(TT, R); |
---|
1172 | |
---|
1173 | if( __TREEOUTPUT__ ) |
---|
1174 | PrintS("\n]},"); |
---|
1175 | } |
---|
1176 | |
---|
1177 | void SchreyerSyzygyComputation::ComputeLeadingSyzygyTerms(bool bComputeSecondTerms) |
---|
1178 | { |
---|
1179 | // const SchreyerSyzygyComputationFlags& attributes = m_atttributes; |
---|
1180 | |
---|
1181 | // const BOOLEAN __LEAD2SYZ__ = attributes.__LEAD2SYZ__; |
---|
1182 | // const BOOLEAN __TAILREDSYZ__ = attributes.__TAILREDSYZ__; |
---|
1183 | |
---|
1184 | assume( m_syzLeads == NULL ); |
---|
1185 | |
---|
1186 | if( bComputeSecondTerms ) |
---|
1187 | { |
---|
1188 | assume( __LEAD2SYZ__ ); |
---|
1189 | // m_syzLeads = FROM_NAMESPACE(INTERNAL, _Compute2LeadingSyzygyTerms(m_idLeads, m_rBaseRing, m_atttributes)); |
---|
1190 | m_syzLeads = Compute2LeadingSyzygyTerms(); |
---|
1191 | } |
---|
1192 | else |
---|
1193 | { |
---|
1194 | assume( !__LEAD2SYZ__ ); |
---|
1195 | |
---|
1196 | m_syzLeads = Compute1LeadingSyzygyTerms(); |
---|
1197 | } |
---|
1198 | // m_syzLeads = FROM_NAMESPACE(INTERNAL, _ComputeLeadingSyzygyTerms(m_idLeads, m_rBaseRing, m_atttributes)); |
---|
1199 | |
---|
1200 | // NOTE: set m_LS if tails are to be reduced! |
---|
1201 | assume( m_syzLeads!= NULL ); |
---|
1202 | |
---|
1203 | if (__TAILREDSYZ__ && !__IGNORETAILS__ && (IDELEMS(m_syzLeads) > 0) && !((IDELEMS(m_syzLeads) == 1) && (m_syzLeads->m[0] == NULL))) |
---|
1204 | { |
---|
1205 | m_LS = m_syzLeads; |
---|
1206 | m_checker.Initialize(m_syzLeads); |
---|
1207 | #ifndef SING_NDEBUG |
---|
1208 | if( __DEBUG__ ) |
---|
1209 | { |
---|
1210 | const ring& r = m_rBaseRing; |
---|
1211 | PrintS("SchreyerSyzygyComputation::ComputeLeadingSyzygyTerms: \n"); |
---|
1212 | PrintS("m_syzLeads: \n"); |
---|
1213 | dPrint(m_syzLeads, r, r, 1); |
---|
1214 | PrintS("m_checker.Initialize(m_syzLeads) => \n"); |
---|
1215 | m_checker.DebugPrint(); |
---|
1216 | } |
---|
1217 | #endif |
---|
1218 | assume( m_checker.IsNonempty() ); // TODO: this always fails... BUG???? |
---|
1219 | } |
---|
1220 | } |
---|
1221 | |
---|
1222 | #define NOPRODUCT 1 |
---|
1223 | |
---|
1224 | poly SchreyerSyzygyComputation::SchreyerSyzygyNF(const poly syz_lead, poly syz_2) const |
---|
1225 | { |
---|
1226 | |
---|
1227 | assume( !__IGNORETAILS__ ); |
---|
1228 | |
---|
1229 | const ideal& L = m_idLeads; |
---|
1230 | const ideal& T = m_idTails; |
---|
1231 | const ring& r = m_rBaseRing; |
---|
1232 | |
---|
1233 | assume( syz_lead != NULL ); |
---|
1234 | |
---|
1235 | if( __TREEOUTPUT__ ) |
---|
1236 | { |
---|
1237 | // PrintS("%%%% BEGIN LIFTHYBRID DIAGRAMM\n"); |
---|
1238 | PrintS("{ \"nodelabel\": \""); writeLatexTerm(syz_lead, r); PrintS("\", \"children\": ["); |
---|
1239 | } |
---|
1240 | |
---|
1241 | if( syz_2 == NULL ) |
---|
1242 | { |
---|
1243 | const int rr = p_GetComp(syz_lead, r) - 1; |
---|
1244 | |
---|
1245 | assume( rr >= 0 && rr < IDELEMS(T) ); |
---|
1246 | assume( rr >= 0 && rr < IDELEMS(L) ); |
---|
1247 | |
---|
1248 | #if NOPRODUCT |
---|
1249 | syz_2 = m_div.FindReducer(syz_lead, L->m[rr], syz_lead, m_checker); |
---|
1250 | |
---|
1251 | if( __TREEOUTPUT__ ) |
---|
1252 | { |
---|
1253 | PrintS("{ \"nodelabel\": \""); writeLatexTerm(syz_2, r); PrintS("\" },"); |
---|
1254 | } |
---|
1255 | #else |
---|
1256 | poly aa = leadmonom(syz_lead, r); assume( aa != NULL); // :( |
---|
1257 | aa = p_Mult_mm(aa, L->m[rr], r); |
---|
1258 | |
---|
1259 | if( __TREEOUTPUT__ ) |
---|
1260 | { |
---|
1261 | PrintS("{ \"nodelabel\": \""); writeLatexTerm(syz_2, r); PrintS("\", \"edgelable\": \""); writeLatexTerm(aa, r, false); PrintS("\" },"); |
---|
1262 | } |
---|
1263 | |
---|
1264 | syz_2 = m_div.FindReducer(aa, syz_lead, m_checker); |
---|
1265 | |
---|
1266 | p_Delete(&aa, r); |
---|
1267 | #endif |
---|
1268 | |
---|
1269 | } |
---|
1270 | |
---|
1271 | assume( syz_2 != NULL ); // by construction of S-Polynomial |
---|
1272 | |
---|
1273 | assume( L != NULL ); |
---|
1274 | assume( T != NULL ); |
---|
1275 | |
---|
1276 | assume( IDELEMS(L) == IDELEMS(T) ); |
---|
1277 | |
---|
1278 | int c = p_GetComp(syz_lead, r) - 1; |
---|
1279 | |
---|
1280 | assume( c >= 0 && c < IDELEMS(T) ); |
---|
1281 | |
---|
1282 | if( m_sum_bucket == NULL ) |
---|
1283 | m_sum_bucket = sBucketCreate(r); |
---|
1284 | |
---|
1285 | if( m_spoly_bucket == NULL ) |
---|
1286 | m_spoly_bucket = kBucketCreate(r); |
---|
1287 | |
---|
1288 | sBucket_pt& tail = m_sum_bucket; assume( tail != NULL ); |
---|
1289 | kBucket_pt& bucket = m_spoly_bucket; assume( bucket != NULL ); |
---|
1290 | kbTest(bucket); |
---|
1291 | |
---|
1292 | |
---|
1293 | // kBucketInit(bucket, NULL, 0); // not needed!? |
---|
1294 | |
---|
1295 | poly p = leadmonom(syz_lead, r); // :( |
---|
1296 | // poly spoly = pp_Mult_qq(p, T->m[c], r); |
---|
1297 | kBucket_Plus_mm_Mult_pp(bucket, p, T->m[c], 0); // TODO: store pLength(T->m[c]) separately!? |
---|
1298 | p_Delete(&p, r); |
---|
1299 | |
---|
1300 | kbTest(bucket); |
---|
1301 | |
---|
1302 | c = p_GetComp(syz_2, r) - 1; |
---|
1303 | assume( c >= 0 && c < IDELEMS(T) ); |
---|
1304 | |
---|
1305 | p = leadmonom(syz_2, r); // :( |
---|
1306 | // spoly = p_Add_q(spoly, pp_Mult_qq(p, T->m[c], r), r); |
---|
1307 | kBucket_Plus_mm_Mult_pp(bucket, p, T->m[c], 0); // pLength(T->m[c])?! |
---|
1308 | kbTest(bucket); |
---|
1309 | p_Delete(&p, r); |
---|
1310 | |
---|
1311 | // TODO: use bucket!? |
---|
1312 | // const bool bUsePolynomial = TEST_OPT_NOT_BUCKETS; // || (pLength(spoly) < MIN_LENGTH_BUCKET); |
---|
1313 | // CPolynomialSummator tail(r, bUsePolynomial); |
---|
1314 | sBucket_Add_p(tail, syz_2, 1); // tail.AddAndDelete(syz_2, 1); |
---|
1315 | |
---|
1316 | kbTest(bucket); |
---|
1317 | for( poly spoly = kBucketExtractLm(bucket); spoly != NULL; p_LmDelete(&spoly, r), spoly = kBucketExtractLm(bucket)) |
---|
1318 | { |
---|
1319 | kbTest(bucket); |
---|
1320 | poly t = m_div.FindReducer(spoly, NULL, m_checker); |
---|
1321 | |
---|
1322 | if( t != NULL ) |
---|
1323 | { |
---|
1324 | p = leadmonom(t, r); // :( |
---|
1325 | c = p_GetComp(t, r) - 1; |
---|
1326 | |
---|
1327 | assume( c >= 0 && c < IDELEMS(T) ); |
---|
1328 | |
---|
1329 | if( __TREEOUTPUT__ ) |
---|
1330 | { |
---|
1331 | PrintS("{ \"nodelabel\": \""); writeLatexTerm(t, r); PrintS("\", \"edgelable\": \""); writeLatexTerm(spoly, r, false); PrintS("\" },"); |
---|
1332 | } |
---|
1333 | |
---|
1334 | kBucket_Plus_mm_Mult_pp(bucket, p, T->m[c], 0); // pLength(T->m[c])? |
---|
1335 | // spoly = p_Add_q(spoly, pp_Mult_qq(p, T->m[c], r), r); |
---|
1336 | |
---|
1337 | p_Delete(&p, r); |
---|
1338 | |
---|
1339 | sBucket_Add_p(tail, t, 1); // tail.AddAndDelete(t, 1); |
---|
1340 | } // otherwise discard that leading term altogether! |
---|
1341 | kbTest(bucket); |
---|
1342 | } |
---|
1343 | |
---|
1344 | // now bucket must be empty! |
---|
1345 | kbTest(bucket); |
---|
1346 | assume( kBucketClear(bucket) == NULL ); |
---|
1347 | |
---|
1348 | poly result; int len; |
---|
1349 | sBucketClearAdd(tail, &result, &len); // TODO: use Merge with sBucket??? |
---|
1350 | assume( pLength(result) == len ); |
---|
1351 | |
---|
1352 | if( __TREEOUTPUT__ ) |
---|
1353 | { |
---|
1354 | PrintS("]},"); |
---|
1355 | } |
---|
1356 | |
---|
1357 | |
---|
1358 | return result; |
---|
1359 | } |
---|
1360 | |
---|
1361 | // namespace { |
---|
1362 | |
---|
1363 | // }; |
---|
1364 | |
---|
1365 | bool my_p_LmCmp (poly a, poly b, const ring r) { return p_LmCmp(a, b, r) == -1; } // TODO: change to simple lex. memory compare! |
---|
1366 | |
---|
1367 | // NOTE: need p_Copy?????? for image + multiplier!!??? |
---|
1368 | // NOTE: better store complete syz. terms!!? |
---|
1369 | poly SchreyerSyzygyComputation::TraverseTail(poly multiplier, const int tail) const |
---|
1370 | { |
---|
1371 | const ring& r = m_rBaseRing; |
---|
1372 | |
---|
1373 | assume(m_idTails != NULL && m_idTails->m != NULL); |
---|
1374 | assume( tail >= 0 && tail < IDELEMS(m_idTails) ); |
---|
1375 | |
---|
1376 | /* return ComputeImage(multiplier, tail); */ |
---|
1377 | |
---|
1378 | // TODO: store (multiplier, tail) -.-^-.-^-.--> ! |
---|
1379 | TCache::iterator top_itr = m_cache.find(tail); |
---|
1380 | |
---|
1381 | if ( top_itr != m_cache.end() ) |
---|
1382 | { |
---|
1383 | assume( top_itr->first == tail ); |
---|
1384 | |
---|
1385 | TP2PCache& T = top_itr->second; |
---|
1386 | |
---|
1387 | TP2PCache::iterator itr = T.find(multiplier); |
---|
1388 | |
---|
1389 | if( itr != T.end() ) // Yey - Reuse!!! |
---|
1390 | { |
---|
1391 | assume( p_LmEqual(itr->first, multiplier, r) ); |
---|
1392 | |
---|
1393 | if( itr->second == NULL ) |
---|
1394 | return (NULL); |
---|
1395 | |
---|
1396 | poly p = p_Copy(itr->second, r); // no copy??? |
---|
1397 | |
---|
1398 | if( __TREEOUTPUT__ ) |
---|
1399 | { |
---|
1400 | // PrintS("{ \"nodelabel\": \""); writeLatexTerm(multiplier, r, false); |
---|
1401 | // Print(" \\\\cdot \\\\GEN{%d}\", \"children\": [ ", tail + 1); |
---|
1402 | Print("{ \"lookedupnode\": \"1\", \"nodelabel\": \""); |
---|
1403 | writeLatexTerm(p, r, true, false); |
---|
1404 | } |
---|
1405 | |
---|
1406 | if( !n_Equal( pGetCoeff(multiplier), pGetCoeff(itr->first), r) ) // normalize coeffs!? |
---|
1407 | { |
---|
1408 | number n = n_Div( pGetCoeff(multiplier), pGetCoeff(itr->first), r); |
---|
1409 | p = p_Mult_nn(p, n, r); |
---|
1410 | n_Delete(&n, r); |
---|
1411 | |
---|
1412 | if( __TREEOUTPUT__ ) |
---|
1413 | Print("\", \"RESCALEDRESULT\": \"1\" },"); |
---|
1414 | } else |
---|
1415 | { |
---|
1416 | if( __TREEOUTPUT__ ) |
---|
1417 | Print("\", \"RESCALEDRESULT\": \"0\" },"); |
---|
1418 | } |
---|
1419 | |
---|
1420 | return p; |
---|
1421 | } |
---|
1422 | |
---|
1423 | if( __TREEOUTPUT__ ) |
---|
1424 | { |
---|
1425 | // PrintS("{ \"nodelabel\": \""); writeLatexTerm(multiplier, r, false); Print(" \\\\cdot \\\\GEN{%d}\", \"children\": [", tail + 1); |
---|
1426 | } |
---|
1427 | |
---|
1428 | const poly p = ComputeImage(multiplier, tail); |
---|
1429 | T.insert( TP2PCache::value_type(p_Copy(multiplier, r), p) ); // T[ multiplier ] = p; |
---|
1430 | |
---|
1431 | // if( p == NULL ) |
---|
1432 | // return (NULL); |
---|
1433 | |
---|
1434 | if( __TREEOUTPUT__ ) |
---|
1435 | { |
---|
1436 | // PrintS("], \"storedResult\": \""); writeLatexTerm(p, r, true, false); PrintS("\" },"); |
---|
1437 | } |
---|
1438 | |
---|
1439 | return p_Copy(p, r); |
---|
1440 | } |
---|
1441 | |
---|
1442 | CCacheCompare o(r); TP2PCache T(o); |
---|
1443 | |
---|
1444 | if( __TREEOUTPUT__ ) |
---|
1445 | { |
---|
1446 | // PrintS("{ \"nodelabel\": \""); writeLatexTerm(multiplier, r, false); Print(" \\\\cdot \\\\GEN{%d}\", \"children\": [", tail + 1); |
---|
1447 | } |
---|
1448 | |
---|
1449 | |
---|
1450 | const poly p = ComputeImage(multiplier, tail); |
---|
1451 | |
---|
1452 | T.insert( TP2PCache::value_type(p_Copy(multiplier, r), p) ); |
---|
1453 | |
---|
1454 | m_cache.insert( TCache::value_type(tail, T) ); |
---|
1455 | |
---|
1456 | // if( p == NULL ) |
---|
1457 | // return (NULL); |
---|
1458 | |
---|
1459 | if( __TREEOUTPUT__ ) |
---|
1460 | { |
---|
1461 | // PrintS("], \"storedResult\": \""); writeLatexTerm(p, r, true, false); PrintS("\" },"); |
---|
1462 | } |
---|
1463 | |
---|
1464 | return p_Copy(p, r); |
---|
1465 | } |
---|
1466 | |
---|
1467 | poly SchreyerSyzygyComputation::ComputeImage(poly multiplier, const int tail) const |
---|
1468 | { |
---|
1469 | const poly t = m_idTails->m[tail]; // !!! |
---|
1470 | |
---|
1471 | if(t != NULL) |
---|
1472 | return TraverseTail(multiplier, t); |
---|
1473 | |
---|
1474 | return NULL; |
---|
1475 | } |
---|
1476 | |
---|
1477 | |
---|
1478 | poly SchreyerSyzygyComputation::TraverseTail(poly multiplier, poly tail) const |
---|
1479 | { |
---|
1480 | assume( !__IGNORETAILS__ ); |
---|
1481 | |
---|
1482 | const ideal& L = m_idLeads; |
---|
1483 | const ideal& T = m_idTails; |
---|
1484 | const ring& r = m_rBaseRing; |
---|
1485 | |
---|
1486 | assume( multiplier != NULL ); |
---|
1487 | |
---|
1488 | assume( L != NULL ); |
---|
1489 | assume( T != NULL ); |
---|
1490 | |
---|
1491 | |
---|
1492 | if( (!__TAILREDSYZ__) || m_lcm.Check(multiplier) ) |
---|
1493 | { |
---|
1494 | // const bool bUsePolynomial = TEST_OPT_NOT_BUCKETS; // || (pLength(tail) < MIN_LENGTH_BUCKET); |
---|
1495 | if( m_sum_bucket == NULL ) |
---|
1496 | m_sum_bucket = sBucketCreate(r); |
---|
1497 | |
---|
1498 | sBucket_pt& sum = m_sum_bucket; assume( sum != NULL ); |
---|
1499 | poly s; int len; |
---|
1500 | |
---|
1501 | // CPolynomialSummator sum(r, bUsePolynomial); |
---|
1502 | // poly s = NULL; |
---|
1503 | for(poly p = tail; p != NULL; p = pNext(p)) // iterate over the tail |
---|
1504 | { |
---|
1505 | // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
---|
1506 | // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
---|
1507 | // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
---|
1508 | const poly rt = ReduceTerm(multiplier, p, NULL); // TODO: also return/store length? |
---|
1509 | // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
---|
1510 | // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
---|
1511 | // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
---|
1512 | |
---|
1513 | const int lp = pLength(rt); |
---|
1514 | if( rt != NULL && lp != 0 ) |
---|
1515 | sBucket_Add_p(sum, rt, lp); |
---|
1516 | } |
---|
1517 | |
---|
1518 | sBucketClearAdd(sum, &s, &len); |
---|
1519 | assume( pLength(s) == len ); |
---|
1520 | return s; |
---|
1521 | } |
---|
1522 | |
---|
1523 | return NULL; |
---|
1524 | |
---|
1525 | } |
---|
1526 | |
---|
1527 | |
---|
1528 | |
---|
1529 | |
---|
1530 | poly SchreyerSyzygyComputation::ReduceTerm(poly multiplier, poly term4reduction, poly syztermCheck) const |
---|
1531 | { |
---|
1532 | assume( !__IGNORETAILS__ ); |
---|
1533 | |
---|
1534 | const ideal& L = m_idLeads; |
---|
1535 | const ideal& T = m_idTails; |
---|
1536 | const ring& r = m_rBaseRing; |
---|
1537 | |
---|
1538 | assume( multiplier != NULL ); |
---|
1539 | assume( term4reduction != NULL ); |
---|
1540 | |
---|
1541 | |
---|
1542 | assume( L != NULL ); |
---|
1543 | assume( T != NULL ); |
---|
1544 | |
---|
1545 | // simple implementation with FindReducer: |
---|
1546 | poly s = NULL; |
---|
1547 | |
---|
1548 | if( (!__TAILREDSYZ__) || m_lcm.Check(multiplier) ) |
---|
1549 | { |
---|
1550 | #if NOPRODUCT |
---|
1551 | s = m_div.FindReducer(multiplier, term4reduction, syztermCheck, m_checker); |
---|
1552 | |
---|
1553 | if( s == NULL ) // No Reducer? |
---|
1554 | return s; |
---|
1555 | |
---|
1556 | if( __TREEOUTPUT__ ) |
---|
1557 | { |
---|
1558 | PrintS("{ \"nodelabel\": \""); writeLatexTerm(s, r); |
---|
1559 | } |
---|
1560 | |
---|
1561 | #else |
---|
1562 | // NOTE: only LT(term4reduction) should be used in the following: |
---|
1563 | poly product = pp_Mult_mm(multiplier, term4reduction, r); |
---|
1564 | s = m_div.FindReducer(product, syztermCheck, m_checker); |
---|
1565 | |
---|
1566 | if( s == NULL ) // No Reducer? |
---|
1567 | return s; |
---|
1568 | |
---|
1569 | if( __TREEOUTPUT__ ) |
---|
1570 | { |
---|
1571 | PrintS("{ \"nodelabel\": \""); writeLatexTerm(s, r); PrintS("\", \"edgelable\": \""); writeLatexTerm(product, r, false); |
---|
1572 | } |
---|
1573 | |
---|
1574 | p_Delete(&product, r); |
---|
1575 | #endif |
---|
1576 | } |
---|
1577 | |
---|
1578 | if( s == NULL ) // No Reducer? |
---|
1579 | return s; |
---|
1580 | |
---|
1581 | |
---|
1582 | poly b = leadmonom(s, r); |
---|
1583 | |
---|
1584 | const int c = p_GetComp(s, r) - 1; |
---|
1585 | assume( c >= 0 && c < IDELEMS(T) ); |
---|
1586 | |
---|
1587 | |
---|
1588 | if( __TREEOUTPUT__ ) |
---|
1589 | PrintS("\", \"children\": ["); |
---|
1590 | |
---|
1591 | const poly t = TraverseTail(b, c); // T->m[c]; |
---|
1592 | |
---|
1593 | if( t != NULL ) |
---|
1594 | s = p_Add_q(s, t, r); |
---|
1595 | |
---|
1596 | if( __TREEOUTPUT__ ) |
---|
1597 | { |
---|
1598 | |
---|
1599 | PrintS("], \"noderesult\": \""); |
---|
1600 | writeLatexTerm(s, r, true, false); |
---|
1601 | PrintS("\" },"); |
---|
1602 | } |
---|
1603 | |
---|
1604 | return s; |
---|
1605 | } |
---|
1606 | |
---|
1607 | SchreyerSyzygyComputationFlags::SchreyerSyzygyComputationFlags(idhdl rootRingHdl): |
---|
1608 | __DEBUG__( atGetInt(rootRingHdl,"DEBUG", 0) ), |
---|
1609 | __LEAD2SYZ__( atGetInt(rootRingHdl, "LEAD2SYZ", 0) ), |
---|
1610 | __TAILREDSYZ__( atGetInt(rootRingHdl, "TAILREDSYZ", 1) ), |
---|
1611 | __HYBRIDNF__( atGetInt(rootRingHdl, "HYBRIDNF", 1) ), |
---|
1612 | __IGNORETAILS__( atGetInt(rootRingHdl, "IGNORETAILS", 0) ), |
---|
1613 | __SYZNUMBER__( atGetInt(rootRingHdl, "SYZNUMBER", 0) ), |
---|
1614 | __TREEOUTPUT__( atGetInt(rootRingHdl, "TREEOUTPUT", 0) ), |
---|
1615 | __SYZCHECK__( atGetInt(rootRingHdl, "SYZCHECK", 0) ), |
---|
1616 | m_rBaseRing( rootRingHdl->data.uring ) |
---|
1617 | { |
---|
1618 | #ifndef SING_NDEBUG |
---|
1619 | if( __DEBUG__ ) |
---|
1620 | { |
---|
1621 | PrintS("SchreyerSyzygyComputationFlags: \n"); |
---|
1622 | Print(" DEBUG: \t%d\n", __DEBUG__); |
---|
1623 | // Print(" SYZCHECK : \t%d\n", __SYZCHECK__); |
---|
1624 | Print(" LEAD2SYZ: \t%d\n", __LEAD2SYZ__); |
---|
1625 | Print(" TAILREDSYZ: \t%d\n", __TAILREDSYZ__); |
---|
1626 | Print(" IGNORETAILS: \t%d\n", __IGNORETAILS__); |
---|
1627 | Print(" TREEOUTPUT: \t%d\n", __TREEOUTPUT__); |
---|
1628 | Print(" SYZCHECK: \t%d\n", __SYZCHECK__); |
---|
1629 | } |
---|
1630 | #endif |
---|
1631 | |
---|
1632 | // TODO: just current setting! |
---|
1633 | assume( rootRingHdl == currRingHdl ); |
---|
1634 | assume( rootRingHdl->typ == RING_CMD ); |
---|
1635 | assume( m_rBaseRing == currRing ); |
---|
1636 | // move the global ring here inside??? |
---|
1637 | } |
---|
1638 | |
---|
1639 | |
---|
1640 | |
---|
1641 | CLeadingTerm::CLeadingTerm(unsigned int _label, const poly _lt, const ring R): |
---|
1642 | m_sev( p_GetShortExpVector(_lt, R) ), m_label( _label ), m_lt( _lt ) |
---|
1643 | { } |
---|
1644 | |
---|
1645 | |
---|
1646 | CReducerFinder::~CReducerFinder() |
---|
1647 | { |
---|
1648 | for( CReducersHash::const_iterator it = m_hash.begin(); it != m_hash.end(); it++ ) |
---|
1649 | { |
---|
1650 | const TReducers& v = it->second; |
---|
1651 | for(TReducers::const_iterator vit = v.begin(); vit != v.end(); vit++ ) |
---|
1652 | delete const_cast<CLeadingTerm*>(*vit); |
---|
1653 | } |
---|
1654 | } |
---|
1655 | |
---|
1656 | |
---|
1657 | void CReducerFinder::Initialize(const ideal L) |
---|
1658 | { |
---|
1659 | assume( m_L == NULL || m_L == L ); |
---|
1660 | if( m_L == NULL ) |
---|
1661 | m_L = L; |
---|
1662 | |
---|
1663 | assume( m_L == L ); |
---|
1664 | |
---|
1665 | if( L != NULL ) |
---|
1666 | { |
---|
1667 | const ring& R = m_rBaseRing; |
---|
1668 | assume( R != NULL ); |
---|
1669 | |
---|
1670 | for( int k = IDELEMS(L) - 1; k >= 0; k-- ) |
---|
1671 | { |
---|
1672 | const poly a = L->m[k]; // assume( a != NULL ); |
---|
1673 | |
---|
1674 | // NOTE: label is k \in 0 ... |L|-1!!! |
---|
1675 | if( a != NULL ) |
---|
1676 | m_hash[p_GetComp(a, R)].push_back( new CLeadingTerm(k, a, R) ); |
---|
1677 | } |
---|
1678 | } |
---|
1679 | } |
---|
1680 | |
---|
1681 | CReducerFinder::CReducerFinder(const ideal L, const SchreyerSyzygyComputationFlags& flags): |
---|
1682 | SchreyerSyzygyComputationFlags(flags), |
---|
1683 | m_L(const_cast<ideal>(L)), // for debug anyway |
---|
1684 | m_hash() |
---|
1685 | { |
---|
1686 | assume( flags.m_rBaseRing == m_rBaseRing ); |
---|
1687 | if( L != NULL ) |
---|
1688 | Initialize(L); |
---|
1689 | } |
---|
1690 | |
---|
1691 | /// _p_LmDivisibleByNoComp for a | b*c |
---|
1692 | static inline BOOLEAN _p_LmDivisibleByNoComp(const poly a, const poly b, const poly c, const ring r) |
---|
1693 | { |
---|
1694 | int i=r->VarL_Size - 1; |
---|
1695 | unsigned long divmask = r->divmask; |
---|
1696 | unsigned long la, lb; |
---|
1697 | |
---|
1698 | if (r->VarL_LowIndex >= 0) |
---|
1699 | { |
---|
1700 | i += r->VarL_LowIndex; |
---|
1701 | do |
---|
1702 | { |
---|
1703 | la = a->exp[i]; |
---|
1704 | lb = b->exp[i] + c->exp[i]; |
---|
1705 | if ((la > lb) || |
---|
1706 | (((la & divmask) ^ (lb & divmask)) != ((lb - la) & divmask))) |
---|
1707 | { |
---|
1708 | pDivAssume(p_DebugLmDivisibleByNoComp(a, b, r) == FALSE); |
---|
1709 | return FALSE; |
---|
1710 | } |
---|
1711 | i--; |
---|
1712 | } |
---|
1713 | while (i>=r->VarL_LowIndex); |
---|
1714 | } |
---|
1715 | else |
---|
1716 | { |
---|
1717 | do |
---|
1718 | { |
---|
1719 | la = a->exp[r->VarL_Offset[i]]; |
---|
1720 | lb = b->exp[r->VarL_Offset[i]] + c->exp[r->VarL_Offset[i]]; |
---|
1721 | if ((la > lb) || |
---|
1722 | (((la & divmask) ^ (lb & divmask)) != ((lb - la) & divmask))) |
---|
1723 | { |
---|
1724 | pDivAssume(p_DebugLmDivisibleByNoComp(a, b, r) == FALSE); |
---|
1725 | return FALSE; |
---|
1726 | } |
---|
1727 | i--; |
---|
1728 | } |
---|
1729 | while (i>=0); |
---|
1730 | } |
---|
1731 | #ifdef HAVE_RINGS |
---|
1732 | assume( !rField_is_Ring(r) ); // not implemented for rings...! |
---|
1733 | #endif |
---|
1734 | return TRUE; |
---|
1735 | } |
---|
1736 | |
---|
1737 | bool CLeadingTerm::DivisibilityCheck(const poly product, const unsigned long not_sev, const ring r) const |
---|
1738 | { |
---|
1739 | const poly p = m_lt; |
---|
1740 | |
---|
1741 | assume( p_GetComp(p, r) == p_GetComp(product, r) ); |
---|
1742 | |
---|
1743 | // const int k = m_label; |
---|
1744 | // assume( m_L->m[k] == p ); |
---|
1745 | |
---|
1746 | const unsigned long p_sev = m_sev; |
---|
1747 | |
---|
1748 | assume( p_sev == p_GetShortExpVector(p, r) ); |
---|
1749 | |
---|
1750 | return p_LmShortDivisibleByNoComp(p, p_sev, product, not_sev, r); |
---|
1751 | |
---|
1752 | } |
---|
1753 | |
---|
1754 | /// as DivisibilityCheck(multiplier * t, ...) for monomial 'm' |
---|
1755 | /// and a module term 't' |
---|
1756 | bool CLeadingTerm::DivisibilityCheck(const poly m, const poly t, const unsigned long not_sev, const ring r) const |
---|
1757 | { |
---|
1758 | const poly p = m_lt; |
---|
1759 | |
---|
1760 | assume( p_GetComp(p, r) == p_GetComp(t, r) ); |
---|
1761 | // assume( p_GetComp(m, r) == 0 ); |
---|
1762 | |
---|
1763 | // const int k = m_label; |
---|
1764 | // assume( m_L->m[k] == p ); |
---|
1765 | |
---|
1766 | const unsigned long p_sev = m_sev; |
---|
1767 | assume( p_sev == p_GetShortExpVector(p, r) ); |
---|
1768 | |
---|
1769 | if (p_sev & not_sev) |
---|
1770 | return false; |
---|
1771 | |
---|
1772 | return _p_LmDivisibleByNoComp(p, m, t, r); |
---|
1773 | |
---|
1774 | // return p_LmShortDivisibleByNoComp(p, p_sev, product, not_sev, r); |
---|
1775 | |
---|
1776 | } |
---|
1777 | |
---|
1778 | |
---|
1779 | |
---|
1780 | /// TODO: |
---|
1781 | class CDivisorEnumerator: public SchreyerSyzygyComputationFlags |
---|
1782 | { |
---|
1783 | private: |
---|
1784 | const CReducerFinder& m_reds; |
---|
1785 | const poly m_product; |
---|
1786 | const unsigned long m_not_sev; |
---|
1787 | const long m_comp; |
---|
1788 | |
---|
1789 | CReducerFinder::CReducersHash::const_iterator m_itr; |
---|
1790 | CReducerFinder::TReducers::const_iterator m_current, m_finish; |
---|
1791 | |
---|
1792 | bool m_active; |
---|
1793 | |
---|
1794 | public: |
---|
1795 | CDivisorEnumerator(const CReducerFinder& self, const poly product): |
---|
1796 | SchreyerSyzygyComputationFlags(self), |
---|
1797 | m_reds(self), |
---|
1798 | m_product(product), |
---|
1799 | m_not_sev(~p_GetShortExpVector(product, m_rBaseRing)), |
---|
1800 | m_comp(p_GetComp(product, m_rBaseRing)), |
---|
1801 | m_itr(), m_current(), m_finish(), |
---|
1802 | m_active(false) |
---|
1803 | { |
---|
1804 | assume( m_comp >= 0 ); |
---|
1805 | assume( m_reds.m_L != NULL ); |
---|
1806 | } |
---|
1807 | |
---|
1808 | inline bool Reset() |
---|
1809 | { |
---|
1810 | m_active = false; |
---|
1811 | |
---|
1812 | m_itr = m_reds.m_hash.find(m_comp); |
---|
1813 | |
---|
1814 | if( m_itr == m_reds.m_hash.end() ) |
---|
1815 | return false; |
---|
1816 | |
---|
1817 | assume( m_itr->first == m_comp ); |
---|
1818 | |
---|
1819 | m_current = (m_itr->second).begin(); |
---|
1820 | m_finish = (m_itr->second).end(); |
---|
1821 | |
---|
1822 | if (m_current == m_finish) |
---|
1823 | return false; |
---|
1824 | |
---|
1825 | // m_active = true; |
---|
1826 | return true; |
---|
1827 | } |
---|
1828 | |
---|
1829 | const CLeadingTerm& Current() const |
---|
1830 | { |
---|
1831 | assume( m_active ); |
---|
1832 | assume( m_current != m_finish ); |
---|
1833 | |
---|
1834 | return *(*m_current); |
---|
1835 | } |
---|
1836 | |
---|
1837 | inline bool MoveNext() |
---|
1838 | { |
---|
1839 | assume( m_current != m_finish ); |
---|
1840 | |
---|
1841 | if( m_active ) |
---|
1842 | ++m_current; |
---|
1843 | else |
---|
1844 | m_active = true; // for Current() |
---|
1845 | |
---|
1846 | // looking for the next good entry |
---|
1847 | for( ; m_current != m_finish; ++m_current ) |
---|
1848 | { |
---|
1849 | assume( m_reds.m_L->m[Current().m_label] == Current().m_lt ); |
---|
1850 | |
---|
1851 | if( Current().DivisibilityCheck(m_product, m_not_sev, m_rBaseRing) ) |
---|
1852 | { |
---|
1853 | #ifndef SING_NDEBUG |
---|
1854 | if( __DEBUG__ ) |
---|
1855 | { |
---|
1856 | Print("CDivisorEnumerator::MoveNext::est LS: q is divisible by LS[%d] !:((, diviser is: ", 1 + Current().m_label); |
---|
1857 | dPrint(Current().m_lt, m_rBaseRing, m_rBaseRing, 1); |
---|
1858 | } |
---|
1859 | #endif |
---|
1860 | // m_active = true; |
---|
1861 | return true; |
---|
1862 | } |
---|
1863 | } |
---|
1864 | |
---|
1865 | // the end... :( |
---|
1866 | assume( m_current == m_finish ); |
---|
1867 | |
---|
1868 | m_active = false; |
---|
1869 | return false; |
---|
1870 | } |
---|
1871 | }; |
---|
1872 | |
---|
1873 | |
---|
1874 | |
---|
1875 | bool CReducerFinder::IsDivisible(const poly product) const |
---|
1876 | { |
---|
1877 | CDivisorEnumerator itr(*this, product); |
---|
1878 | if( !itr.Reset() ) |
---|
1879 | return false; |
---|
1880 | |
---|
1881 | return itr.MoveNext(); |
---|
1882 | |
---|
1883 | /* |
---|
1884 | const ring& r = m_rBaseRing; |
---|
1885 | |
---|
1886 | const long comp = p_GetComp(product, r); |
---|
1887 | const unsigned long not_sev = ~p_GetShortExpVector(product, r); |
---|
1888 | |
---|
1889 | assume( comp >= 0 ); |
---|
1890 | |
---|
1891 | CReducersHash::const_iterator it = m_hash.find(comp); // same module component |
---|
1892 | |
---|
1893 | assume( m_L != NULL ); |
---|
1894 | |
---|
1895 | if( it == m_hash.end() ) |
---|
1896 | return false; |
---|
1897 | // assume comp! |
---|
1898 | |
---|
1899 | const TReducers& reducers = it->second; |
---|
1900 | |
---|
1901 | for(TReducers::const_iterator vit = reducers.begin(); vit != reducers.end(); vit++ ) |
---|
1902 | { |
---|
1903 | assume( m_L->m[(*vit)->m_label] == (*vit)->m_lt ); |
---|
1904 | |
---|
1905 | if( (*vit)->DivisibilityCheck(product, not_sev, r) ) |
---|
1906 | { |
---|
1907 | if( __DEBUG__ ) |
---|
1908 | { |
---|
1909 | Print("_FindReducer::Test LS: q is divisible by LS[%d] !:((, diviser is: ", 1 + (*vit)->m_label); |
---|
1910 | dPrint((*vit)->m_lt, r, r, 1); |
---|
1911 | } |
---|
1912 | |
---|
1913 | return true; |
---|
1914 | } |
---|
1915 | } |
---|
1916 | |
---|
1917 | return false; |
---|
1918 | */ |
---|
1919 | } |
---|
1920 | |
---|
1921 | |
---|
1922 | #ifndef SING_NDEBUG |
---|
1923 | void CReducerFinder::DebugPrint() const |
---|
1924 | { |
---|
1925 | const ring& r = m_rBaseRing; |
---|
1926 | |
---|
1927 | for( CReducersHash::const_iterator it = m_hash.begin(); it != m_hash.end(); it++) |
---|
1928 | { |
---|
1929 | Print("Hash Key: %ld, Values: \n", it->first); |
---|
1930 | const TReducers& reducers = it->second; |
---|
1931 | |
---|
1932 | for(TReducers::const_iterator vit = reducers.begin(); vit != reducers.end(); vit++ ) |
---|
1933 | { |
---|
1934 | const poly p = (*vit)->m_lt; |
---|
1935 | |
---|
1936 | assume( p_GetComp(p, r) == it->first ); |
---|
1937 | |
---|
1938 | const int k = (*vit)->m_label; |
---|
1939 | |
---|
1940 | assume( m_L->m[k] == p ); |
---|
1941 | |
---|
1942 | const unsigned long p_sev = (*vit)->m_sev; |
---|
1943 | |
---|
1944 | assume( p_sev == p_GetShortExpVector(p, r) ); |
---|
1945 | |
---|
1946 | Print("L[%d]: ", k); dPrint(p, r, r, 0); Print("SEV: %ld\n", p_sev); |
---|
1947 | } |
---|
1948 | } |
---|
1949 | } |
---|
1950 | #endif |
---|
1951 | |
---|
1952 | /// TODO: |
---|
1953 | class CDivisorEnumerator2: public SchreyerSyzygyComputationFlags |
---|
1954 | { |
---|
1955 | private: |
---|
1956 | const CReducerFinder& m_reds; |
---|
1957 | const poly m_multiplier, m_term; |
---|
1958 | const unsigned long m_not_sev; |
---|
1959 | const long m_comp; |
---|
1960 | |
---|
1961 | CReducerFinder::CReducersHash::const_iterator m_itr; |
---|
1962 | CReducerFinder::TReducers::const_iterator m_current, m_finish; |
---|
1963 | |
---|
1964 | bool m_active; |
---|
1965 | |
---|
1966 | public: |
---|
1967 | CDivisorEnumerator2(const CReducerFinder& self, const poly m, const poly t): |
---|
1968 | SchreyerSyzygyComputationFlags(self), |
---|
1969 | m_reds(self), |
---|
1970 | m_multiplier(m), m_term(t), |
---|
1971 | m_not_sev(~p_GetShortExpVector(m, t, m_rBaseRing)), |
---|
1972 | m_comp(p_GetComp(t, m_rBaseRing)), |
---|
1973 | m_itr(), m_current(), m_finish(), |
---|
1974 | m_active(false) |
---|
1975 | { |
---|
1976 | assume( m_comp >= 0 ); |
---|
1977 | assume( m_reds.m_L != NULL ); |
---|
1978 | assume( m_multiplier != NULL ); |
---|
1979 | assume( m_term != NULL ); |
---|
1980 | // assume( p_GetComp(m_multiplier, m_rBaseRing) == 0 ); |
---|
1981 | } |
---|
1982 | |
---|
1983 | inline bool Reset() |
---|
1984 | { |
---|
1985 | m_active = false; |
---|
1986 | |
---|
1987 | m_itr = m_reds.m_hash.find(m_comp); |
---|
1988 | |
---|
1989 | if( m_itr == m_reds.m_hash.end() ) |
---|
1990 | return false; |
---|
1991 | |
---|
1992 | assume( m_itr->first == m_comp ); |
---|
1993 | |
---|
1994 | m_current = (m_itr->second).begin(); |
---|
1995 | m_finish = (m_itr->second).end(); |
---|
1996 | |
---|
1997 | if (m_current == m_finish) |
---|
1998 | return false; |
---|
1999 | |
---|
2000 | return true; |
---|
2001 | } |
---|
2002 | |
---|
2003 | const CLeadingTerm& Current() const |
---|
2004 | { |
---|
2005 | assume( m_active ); |
---|
2006 | assume( m_current != m_finish ); |
---|
2007 | |
---|
2008 | return *(*m_current); |
---|
2009 | } |
---|
2010 | |
---|
2011 | inline bool MoveNext() |
---|
2012 | { |
---|
2013 | assume( m_current != m_finish ); |
---|
2014 | |
---|
2015 | if( m_active ) |
---|
2016 | ++m_current; |
---|
2017 | else |
---|
2018 | m_active = true; |
---|
2019 | |
---|
2020 | |
---|
2021 | // looking for the next good entry |
---|
2022 | for( ; m_current != m_finish; ++m_current ) |
---|
2023 | { |
---|
2024 | assume( m_reds.m_L->m[Current().m_label] == Current().m_lt ); |
---|
2025 | |
---|
2026 | if( Current().DivisibilityCheck(m_multiplier, m_term, m_not_sev, m_rBaseRing) ) |
---|
2027 | { |
---|
2028 | #ifndef SING_NDEBUG |
---|
2029 | if( __DEBUG__ ) |
---|
2030 | { |
---|
2031 | Print("CDivisorEnumerator::MoveNext::est LS: q is divisible by LS[%d] !:((, diviser is: ", 1 + Current().m_label); |
---|
2032 | dPrint(Current().m_lt, m_rBaseRing, m_rBaseRing, 1); |
---|
2033 | } |
---|
2034 | #endif |
---|
2035 | // m_active = true; |
---|
2036 | return true; |
---|
2037 | |
---|
2038 | } |
---|
2039 | } |
---|
2040 | |
---|
2041 | // the end... :( |
---|
2042 | assume( m_current == m_finish ); |
---|
2043 | |
---|
2044 | m_active = false; |
---|
2045 | return false; |
---|
2046 | } |
---|
2047 | }; |
---|
2048 | |
---|
2049 | poly CReducerFinder::FindReducer(const poly multiplier, const poly t, |
---|
2050 | const poly syzterm, |
---|
2051 | const CReducerFinder& syz_checker) const |
---|
2052 | { |
---|
2053 | CDivisorEnumerator2 itr(*this, multiplier, t); |
---|
2054 | if( !itr.Reset() ) |
---|
2055 | return NULL; |
---|
2056 | |
---|
2057 | // don't care about the module component of multiplier (as it may be the syzygy term) |
---|
2058 | // product = multiplier * t? |
---|
2059 | const ring& r = m_rBaseRing; |
---|
2060 | |
---|
2061 | assume( multiplier != NULL ); assume( t != NULL ); |
---|
2062 | |
---|
2063 | const ideal& L = m_L; assume( L != NULL ); // for debug/testing only! |
---|
2064 | |
---|
2065 | long c = 0; |
---|
2066 | |
---|
2067 | if (syzterm != NULL) |
---|
2068 | c = p_GetComp(syzterm, r) - 1; |
---|
2069 | |
---|
2070 | assume( c >= 0 && c < IDELEMS(L) ); |
---|
2071 | |
---|
2072 | if (__DEBUG__ && (syzterm != NULL)) |
---|
2073 | { |
---|
2074 | const poly m = L->m[c]; |
---|
2075 | |
---|
2076 | assume( m != NULL ); assume( pNext(m) == NULL ); |
---|
2077 | |
---|
2078 | poly lm = p_Mult_mm(leadmonom(syzterm, r), m, r); |
---|
2079 | |
---|
2080 | poly pr = p_Mult_q( leadmonom(multiplier, r, false), leadmonom(t, r, false), r); |
---|
2081 | |
---|
2082 | assume( p_EqualPolys(lm, pr, r) ); |
---|
2083 | |
---|
2084 | // def @@c = leadcomp(syzterm); int @@r = int(@@c); |
---|
2085 | // def @@product = leadmonomial(syzterm) * L[@@r]; |
---|
2086 | |
---|
2087 | p_Delete(&lm, r); |
---|
2088 | p_Delete(&pr, r); |
---|
2089 | } |
---|
2090 | |
---|
2091 | const BOOLEAN to_check = (syz_checker.IsNonempty()); // __TAILREDSYZ__ && |
---|
2092 | |
---|
2093 | const poly q = p_New(r); pNext(q) = NULL; |
---|
2094 | |
---|
2095 | if( __DEBUG__ ) |
---|
2096 | p_SetCoeff0(q, 0, r); // for printing q |
---|
2097 | |
---|
2098 | while( itr.MoveNext() ) |
---|
2099 | { |
---|
2100 | const poly p = itr.Current().m_lt; |
---|
2101 | const int k = itr.Current().m_label; |
---|
2102 | |
---|
2103 | p_ExpVectorSum(q, multiplier, t, r); // q == product == multiplier * t // TODO: do it once? |
---|
2104 | p_ExpVectorDiff(q, q, p, r); // (LM(product) / LM(L[k])) |
---|
2105 | |
---|
2106 | p_SetComp(q, k + 1, r); |
---|
2107 | p_Setm(q, r); |
---|
2108 | |
---|
2109 | // cannot allow something like: a*gen(i) - a*gen(i) |
---|
2110 | if (syzterm != NULL && (k == c)) |
---|
2111 | if (p_ExpVectorEqual(syzterm, q, r)) |
---|
2112 | { |
---|
2113 | #ifndef SING_NDEBUG |
---|
2114 | if( __DEBUG__ ) |
---|
2115 | { |
---|
2116 | Print("_FindReducer::Test SYZTERM: q == syzterm !:((, syzterm is: "); |
---|
2117 | dPrint(syzterm, r, r, 1); |
---|
2118 | } |
---|
2119 | #endif |
---|
2120 | continue; |
---|
2121 | } |
---|
2122 | |
---|
2123 | // while the complement (the fraction) is not reducible by leading syzygies |
---|
2124 | if( to_check && syz_checker.IsDivisible(q) ) |
---|
2125 | { |
---|
2126 | #ifndef SING_NDEBUG |
---|
2127 | if( __DEBUG__ ) |
---|
2128 | { |
---|
2129 | PrintS("_FindReducer::Test LS: q is divisible by LS[?] !:((: "); |
---|
2130 | } |
---|
2131 | #endif |
---|
2132 | continue; |
---|
2133 | } |
---|
2134 | |
---|
2135 | number n = n_Mult( p_GetCoeff(multiplier, r), p_GetCoeff(t, r), r); |
---|
2136 | p_SetCoeff0(q, n_InpNeg( n_Div(n, p_GetCoeff(p, r), r), r), r); |
---|
2137 | n_Delete(&n, r); |
---|
2138 | |
---|
2139 | return q; |
---|
2140 | } |
---|
2141 | |
---|
2142 | /* |
---|
2143 | const long comp = p_GetComp(t, r); assume( comp >= 0 ); |
---|
2144 | const unsigned long not_sev = ~p_GetShortExpVector(multiplier, t, r); // ! |
---|
2145 | |
---|
2146 | // for( int k = IDELEMS(L)-1; k>= 0; k-- ) |
---|
2147 | // { |
---|
2148 | // const poly p = L->m[k]; |
---|
2149 | // |
---|
2150 | // if ( p_GetComp(p, r) != comp ) |
---|
2151 | // continue; |
---|
2152 | // |
---|
2153 | // const unsigned long p_sev = p_GetShortExpVector(p, r); // to be stored in m_hash!!! |
---|
2154 | |
---|
2155 | // looking for an appropriate diviser p = L[k]... |
---|
2156 | CReducersHash::const_iterator it = m_hash.find(comp); // same module component |
---|
2157 | |
---|
2158 | if( it == m_hash.end() ) |
---|
2159 | return NULL; |
---|
2160 | |
---|
2161 | // assume comp! |
---|
2162 | |
---|
2163 | assume( m_L != NULL ); |
---|
2164 | |
---|
2165 | const TReducers& reducers = it->second; |
---|
2166 | |
---|
2167 | for(TReducers::const_iterator vit = reducers.begin(); vit != reducers.end(); vit++ ) |
---|
2168 | { |
---|
2169 | |
---|
2170 | const poly p = (*vit)->m_lt; |
---|
2171 | const int k = (*vit)->m_label; |
---|
2172 | |
---|
2173 | assume( L->m[k] == p ); |
---|
2174 | |
---|
2175 | // const unsigned long p_sev = (*vit)->m_sev; |
---|
2176 | // assume( p_sev == p_GetShortExpVector(p, r) ); |
---|
2177 | |
---|
2178 | // if( !p_LmShortDivisibleByNoComp(p, p_sev, product, not_sev, r) ) |
---|
2179 | // continue; |
---|
2180 | |
---|
2181 | if( !(*vit)->DivisibilityCheck(multiplier, t, not_sev, r) ) |
---|
2182 | continue; |
---|
2183 | |
---|
2184 | |
---|
2185 | // if (p_sev & not_sev) continue; |
---|
2186 | // if( !_p_LmDivisibleByNoComp(p, multiplier, t, r) ) continue; |
---|
2187 | |
---|
2188 | |
---|
2189 | p_ExpVectorSum(q, multiplier, t, r); // q == product == multiplier * t |
---|
2190 | p_ExpVectorDiff(q, q, p, r); // (LM(product) / LM(L[k])) |
---|
2191 | |
---|
2192 | p_SetComp(q, k + 1, r); |
---|
2193 | p_Setm(q, r); |
---|
2194 | |
---|
2195 | // cannot allow something like: a*gen(i) - a*gen(i) |
---|
2196 | if (syzterm != NULL && (k == c)) |
---|
2197 | if (p_ExpVectorEqual(syzterm, q, r)) |
---|
2198 | { |
---|
2199 | if( __DEBUG__ ) |
---|
2200 | { |
---|
2201 | Print("_FindReducer::Test SYZTERM: q == syzterm !:((, syzterm is: "); |
---|
2202 | dPrint(syzterm, r, r, 1); |
---|
2203 | } |
---|
2204 | |
---|
2205 | continue; |
---|
2206 | } |
---|
2207 | |
---|
2208 | // while the complement (the fraction) is not reducible by leading syzygies |
---|
2209 | if( to_check && syz_checker.IsDivisible(q) ) |
---|
2210 | { |
---|
2211 | if( __DEBUG__ ) |
---|
2212 | { |
---|
2213 | PrintS("_FindReducer::Test LS: q is divisible by LS[?] !:((: "); |
---|
2214 | } |
---|
2215 | |
---|
2216 | continue; |
---|
2217 | } |
---|
2218 | |
---|
2219 | number n = n_Mult( p_GetCoeff(multiplier, r), p_GetCoeff(t, r), r); |
---|
2220 | p_SetCoeff0(q, n_InpNeg( n_Div(n, p_GetCoeff(p, r), r), r), r); |
---|
2221 | n_Delete(&n, r); |
---|
2222 | |
---|
2223 | return q; |
---|
2224 | } |
---|
2225 | */ |
---|
2226 | |
---|
2227 | p_LmFree(q, r); |
---|
2228 | |
---|
2229 | return NULL; |
---|
2230 | |
---|
2231 | } |
---|
2232 | |
---|
2233 | |
---|
2234 | poly CReducerFinder::FindReducer(const poly product, const poly syzterm, const CReducerFinder& syz_checker) const |
---|
2235 | { |
---|
2236 | CDivisorEnumerator itr(*this, product); |
---|
2237 | if( !itr.Reset() ) |
---|
2238 | return NULL; |
---|
2239 | |
---|
2240 | |
---|
2241 | const ring& r = m_rBaseRing; |
---|
2242 | |
---|
2243 | assume( product != NULL ); |
---|
2244 | |
---|
2245 | const ideal& L = m_L; assume( L != NULL ); // for debug/testing only! |
---|
2246 | |
---|
2247 | long c = 0; |
---|
2248 | |
---|
2249 | if (syzterm != NULL) |
---|
2250 | c = p_GetComp(syzterm, r) - 1; |
---|
2251 | |
---|
2252 | assume( c >= 0 && c < IDELEMS(L) ); |
---|
2253 | |
---|
2254 | if (__DEBUG__ && (syzterm != NULL)) |
---|
2255 | { |
---|
2256 | const poly m = L->m[c]; |
---|
2257 | |
---|
2258 | assume( m != NULL ); assume( pNext(m) == NULL ); |
---|
2259 | |
---|
2260 | poly lm = p_Mult_mm(leadmonom(syzterm, r), m, r); |
---|
2261 | assume( p_EqualPolys(lm, product, r) ); |
---|
2262 | |
---|
2263 | // def @@c = leadcomp(syzterm); int @@r = int(@@c); |
---|
2264 | // def @@product = leadmonomial(syzterm) * L[@@r]; |
---|
2265 | |
---|
2266 | p_Delete(&lm, r); |
---|
2267 | } |
---|
2268 | |
---|
2269 | |
---|
2270 | const BOOLEAN to_check = (syz_checker.IsNonempty()); // __TAILREDSYZ__ && |
---|
2271 | |
---|
2272 | const poly q = p_New(r); pNext(q) = NULL; |
---|
2273 | |
---|
2274 | if( __DEBUG__ ) |
---|
2275 | p_SetCoeff0(q, 0, r); // for printing q |
---|
2276 | |
---|
2277 | while( itr.MoveNext() ) |
---|
2278 | { |
---|
2279 | const poly p = itr.Current().m_lt; |
---|
2280 | const int k = itr.Current().m_label; |
---|
2281 | |
---|
2282 | p_ExpVectorDiff(q, product, p, r); // (LM(product) / LM(L[k])) |
---|
2283 | p_SetComp(q, k + 1, r); |
---|
2284 | p_Setm(q, r); |
---|
2285 | |
---|
2286 | // cannot allow something like: a*gen(i) - a*gen(i) |
---|
2287 | if (syzterm != NULL && (k == c)) |
---|
2288 | if (p_ExpVectorEqual(syzterm, q, r)) |
---|
2289 | { |
---|
2290 | #ifndef SING_NDEBUG |
---|
2291 | if( __DEBUG__ ) |
---|
2292 | { |
---|
2293 | Print("_FindReducer::Test SYZTERM: q == syzterm !:((, syzterm is: "); |
---|
2294 | dPrint(syzterm, r, r, 1); |
---|
2295 | } |
---|
2296 | #endif |
---|
2297 | continue; |
---|
2298 | } |
---|
2299 | |
---|
2300 | // while the complement (the fraction) is not reducible by leading syzygies |
---|
2301 | if( to_check && syz_checker.IsDivisible(q) ) |
---|
2302 | { |
---|
2303 | #ifndef SING_NDEBUG |
---|
2304 | if( __DEBUG__ ) |
---|
2305 | { |
---|
2306 | PrintS("_FindReducer::Test LS: q is divisible by LS[?] !:((: "); |
---|
2307 | } |
---|
2308 | #endif |
---|
2309 | continue; |
---|
2310 | } |
---|
2311 | |
---|
2312 | p_SetCoeff0(q, n_InpNeg( n_Div( p_GetCoeff(product, r), p_GetCoeff(p, r), r), r), r); |
---|
2313 | |
---|
2314 | return q; |
---|
2315 | } |
---|
2316 | |
---|
2317 | |
---|
2318 | |
---|
2319 | /* |
---|
2320 | const long comp = p_GetComp(product, r); |
---|
2321 | const unsigned long not_sev = ~p_GetShortExpVector(product, r); |
---|
2322 | |
---|
2323 | assume( comp >= 0 ); |
---|
2324 | |
---|
2325 | // for( int k = IDELEMS(L)-1; k>= 0; k-- ) |
---|
2326 | // { |
---|
2327 | // const poly p = L->m[k]; |
---|
2328 | // |
---|
2329 | // if ( p_GetComp(p, r) != comp ) |
---|
2330 | // continue; |
---|
2331 | // |
---|
2332 | // const unsigned long p_sev = p_GetShortExpVector(p, r); // to be stored in m_hash!!! |
---|
2333 | |
---|
2334 | // looking for an appropriate diviser p = L[k]... |
---|
2335 | CReducersHash::const_iterator it = m_hash.find(comp); // same module component |
---|
2336 | |
---|
2337 | if( it == m_hash.end() ) |
---|
2338 | return NULL; |
---|
2339 | |
---|
2340 | assume( m_L != NULL ); |
---|
2341 | |
---|
2342 | const TReducers& reducers = it->second; |
---|
2343 | |
---|
2344 | const BOOLEAN to_check = (syz_checker.IsNonempty()); // __TAILREDSYZ__ && |
---|
2345 | |
---|
2346 | const poly q = p_New(r); pNext(q) = NULL; |
---|
2347 | |
---|
2348 | if( __DEBUG__ ) |
---|
2349 | p_SetCoeff0(q, 0, r); // for printing q |
---|
2350 | |
---|
2351 | for(TReducers::const_iterator vit = reducers.begin(); vit != reducers.end(); vit++ ) |
---|
2352 | { |
---|
2353 | const poly p = (*vit)->m_lt; |
---|
2354 | |
---|
2355 | assume( p_GetComp(p, r) == comp ); |
---|
2356 | |
---|
2357 | const int k = (*vit)->m_label; |
---|
2358 | |
---|
2359 | assume( L->m[k] == p ); |
---|
2360 | |
---|
2361 | const unsigned long p_sev = (*vit)->m_sev; |
---|
2362 | |
---|
2363 | assume( p_sev == p_GetShortExpVector(p, r) ); |
---|
2364 | |
---|
2365 | if( !p_LmShortDivisibleByNoComp(p, p_sev, product, not_sev, r) ) |
---|
2366 | continue; |
---|
2367 | |
---|
2368 | // // ... which divides the product, looking for the _1st_ appropriate one! |
---|
2369 | // if( !p_LmDivisibleByNoComp(p, product, r) ) // included inside p_LmShortDivisibleBy! |
---|
2370 | // continue; |
---|
2371 | |
---|
2372 | p_ExpVectorDiff(q, product, p, r); // (LM(product) / LM(L[k])) |
---|
2373 | p_SetComp(q, k + 1, r); |
---|
2374 | p_Setm(q, r); |
---|
2375 | |
---|
2376 | // cannot allow something like: a*gen(i) - a*gen(i) |
---|
2377 | if (syzterm != NULL && (k == c)) |
---|
2378 | if (p_ExpVectorEqual(syzterm, q, r)) |
---|
2379 | { |
---|
2380 | if( __DEBUG__ ) |
---|
2381 | { |
---|
2382 | Print("_FindReducer::Test SYZTERM: q == syzterm !:((, syzterm is: "); |
---|
2383 | dPrint(syzterm, r, r, 1); |
---|
2384 | } |
---|
2385 | |
---|
2386 | continue; |
---|
2387 | } |
---|
2388 | |
---|
2389 | // while the complement (the fraction) is not reducible by leading syzygies |
---|
2390 | if( to_check && syz_checker.IsDivisible(q) ) |
---|
2391 | { |
---|
2392 | if( __DEBUG__ ) |
---|
2393 | { |
---|
2394 | PrintS("_FindReducer::Test LS: q is divisible by LS[?] !:((: "); |
---|
2395 | } |
---|
2396 | |
---|
2397 | continue; |
---|
2398 | } |
---|
2399 | |
---|
2400 | p_SetCoeff0(q, n_InpNeg( n_Div( p_GetCoeff(product, r), p_GetCoeff(p, r), r), r), r); |
---|
2401 | return q; |
---|
2402 | } |
---|
2403 | */ |
---|
2404 | |
---|
2405 | p_LmFree(q, r); |
---|
2406 | |
---|
2407 | return NULL; |
---|
2408 | } |
---|
2409 | |
---|
2410 | |
---|
2411 | |
---|
2412 | CLCM::CLCM(const ideal& L, const SchreyerSyzygyComputationFlags& flags): |
---|
2413 | SchreyerSyzygyComputationFlags(flags), std::vector<bool>(), |
---|
2414 | m_compute(false), m_N(rVar(flags.m_rBaseRing)) |
---|
2415 | { |
---|
2416 | const ring& R = m_rBaseRing; |
---|
2417 | assume( flags.m_rBaseRing == R ); |
---|
2418 | assume( R != NULL ); |
---|
2419 | |
---|
2420 | assume( L != NULL ); |
---|
2421 | |
---|
2422 | if( __TAILREDSYZ__ && !__HYBRIDNF__ && (L != NULL)) |
---|
2423 | { |
---|
2424 | const int l = IDELEMS(L); |
---|
2425 | |
---|
2426 | assume( l > 0 ); |
---|
2427 | |
---|
2428 | resize(l, false); |
---|
2429 | |
---|
2430 | for( int k = l - 1; k >= 0; k-- ) |
---|
2431 | { |
---|
2432 | const poly a = L->m[k]; assume( a != NULL ); |
---|
2433 | |
---|
2434 | for (unsigned int j = m_N; j > 0; j--) |
---|
2435 | if ( !(*this)[j] ) |
---|
2436 | (*this)[j] = (p_GetExp(a, j, R) > 0); |
---|
2437 | } |
---|
2438 | |
---|
2439 | m_compute = true; |
---|
2440 | } |
---|
2441 | } |
---|
2442 | |
---|
2443 | |
---|
2444 | bool CLCM::Check(const poly m) const |
---|
2445 | { |
---|
2446 | assume( m != NULL ); |
---|
2447 | if( m_compute && (m != NULL)) |
---|
2448 | { |
---|
2449 | const ring& R = m_rBaseRing; |
---|
2450 | |
---|
2451 | assume( __TAILREDSYZ__ && !__HYBRIDNF__ ); |
---|
2452 | |
---|
2453 | for (unsigned int j = m_N; j > 0; j--) |
---|
2454 | if ( (*this)[j] ) |
---|
2455 | if(p_GetExp(m, j, R) > 0) |
---|
2456 | return true; |
---|
2457 | |
---|
2458 | return false; |
---|
2459 | |
---|
2460 | } else return true; |
---|
2461 | } |
---|
2462 | |
---|
2463 | CCacheCompare::CCacheCompare(): m_ring(currRing) {} |
---|
2464 | |
---|
2465 | |
---|
2466 | template class std::vector<bool>; |
---|
2467 | template class std::vector<CLeadingTerm const*>; |
---|
2468 | template class std::map< CReducerFinder::TComponentKey, CReducerFinder::TReducers >; |
---|
2469 | |
---|
2470 | template class std::map<TCacheKey, TCacheValue, struct CCacheCompare>; |
---|
2471 | template class std::map<int, TP2PCache>; |
---|
2472 | |
---|
2473 | |
---|
2474 | |
---|
2475 | END_NAMESPACE END_NAMESPACE_SINGULARXX |
---|
2476 | |
---|
2477 | |
---|
2478 | // Vi-modeline: vim: filetype=c:syntax:shiftwidth=2:tabstop=8:textwidth=0:expandtab |
---|