1 | // emacs edit mode for this file is -*- C++ -*- |
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2 | /**************************************** |
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3 | * Computer Algebra System SINGULAR * |
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4 | ****************************************/ |
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5 | // $Id$ |
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6 | /* |
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7 | * ABSTRACT: convert data between Singular and factory |
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8 | */ |
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9 | |
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10 | |
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11 | #include <kernel/mod2.h> |
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12 | #ifdef HAVE_FACTORY |
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13 | #include <omalloc/omalloc.h> |
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14 | #include <kernel/structs.h> |
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15 | #define SI_DONT_HAVE_GLOBAL_VARS |
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16 | #include <kernel/clapconv.h> |
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17 | #include <kernel/numbers.h> |
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18 | #include <kernel/modulop.h> |
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19 | #include <kernel/longalg.h> |
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20 | #include <kernel/longtrans.h> |
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21 | #include <kernel/polys.h> |
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22 | #include <kernel/febase.h> |
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23 | #include <kernel/ring.h> |
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24 | #include <kernel/sbuckets.h> |
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25 | #include <kernel/ffields.h> |
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26 | |
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27 | typedef __mpz_struct lint; |
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28 | |
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29 | void out_cf(char *s1,const CanonicalForm &f,char *s2); |
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30 | |
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31 | static void conv_RecPP ( const CanonicalForm & f, int * exp, sBucket_pt result, ring r ); |
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32 | |
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33 | static void convRecTrP ( const CanonicalForm & f, int * exp, poly & result, int offs, const ring r ); |
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34 | |
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35 | static void convRecGFGF ( const CanonicalForm & f, int * exp, poly & result ); |
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36 | |
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37 | static number convFactoryNSingAN( const CanonicalForm &f, const ring r); |
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38 | |
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39 | CanonicalForm convSingNFactoryN( number n, const ring r ) |
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40 | { |
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41 | CanonicalForm term; |
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42 | /* does only work for Zp, Q */ |
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43 | if ((r==NULL) || rField_is_Q(r)) |
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44 | { |
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45 | if ( SR_HDL(n) & SR_INT ) |
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46 | { |
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47 | term = SR_TO_INT(n); |
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48 | } |
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49 | else |
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50 | { |
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51 | if ( n->s == 3 ) |
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52 | { |
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53 | lint dummy; |
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54 | mpz_init_set( &dummy,n->z ); |
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55 | term = make_cf( dummy ); |
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56 | } |
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57 | else |
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58 | { |
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59 | // assume s==0 or s==1 |
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60 | lint num, den; |
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61 | On(SW_RATIONAL); |
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62 | mpz_init_set( &num, n->z ); |
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63 | mpz_init_set( &den, n->n ); |
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64 | term = make_cf( num, den, ( n->s != 1 )); |
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65 | } |
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66 | } |
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67 | } |
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68 | else /*if ( (r!=NULL) && rField_is_Zp(r) ) */ |
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69 | { |
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70 | term = npInt( n,r ); |
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71 | } |
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72 | return term; |
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73 | } |
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74 | |
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75 | number convFactoryNSingN( const CanonicalForm & n, const ring r) |
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76 | { |
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77 | if (n.isImm()) |
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78 | { |
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79 | if (r==NULL) return nlInit(n.intval(),NULL); |
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80 | else return n_Init(n.intval(),r); |
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81 | } |
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82 | else |
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83 | { |
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84 | number z=ALLOC_RNUMBER(); |
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85 | #if defined(LDEBUG) |
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86 | z->debug=123456; |
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87 | #endif |
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88 | gmp_numerator( n, z->z ); |
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89 | if ( n.den().isOne() ) |
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90 | z->s = 3; |
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91 | else |
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92 | { |
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93 | gmp_denominator( n, z->n ); |
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94 | z->s = 0; |
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95 | } |
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96 | nlNormalize(z); |
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97 | return z; |
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98 | } |
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99 | } |
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100 | |
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101 | //number convFactoryNSingN( const CanonicalForm & n) |
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102 | //{ |
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103 | // return convFactoryNSingN(n,currRing); |
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104 | //} |
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105 | |
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106 | |
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107 | poly convFactoryPSingP ( const CanonicalForm & f, const ring r ) |
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108 | { |
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109 | // cerr << " f = " << f << endl; |
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110 | int n = rVar(r)+1; |
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111 | /* ASSERT( level( f ) <= pVariables, "illegal number of variables" ); */ |
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112 | int * exp = (int*)omAlloc0(n*sizeof(int)); |
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113 | sBucket_pt result_bucket=sBucketCreate(r); |
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114 | conv_RecPP( f, exp, result_bucket, r ); |
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115 | poly result; int dummy; |
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116 | sBucketDestroyMerge(result_bucket,&result,&dummy); |
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117 | omFreeSize((ADDRESS)exp,n*sizeof(int)); |
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118 | return result; |
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119 | } |
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120 | |
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121 | static void conv_RecPP ( const CanonicalForm & f, int * exp, sBucket_pt result, ring r ) |
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122 | { |
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123 | if (f.isZero()) |
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124 | return; |
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125 | if ( ! f.inCoeffDomain() ) |
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126 | { |
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127 | int l = f.level(); |
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128 | for ( CFIterator i = f; i.hasTerms(); i++ ) |
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129 | { |
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130 | exp[l] = i.exp(); |
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131 | conv_RecPP( i.coeff(), exp, result, r ); |
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132 | } |
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133 | exp[l] = 0; |
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134 | } |
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135 | else |
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136 | { |
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137 | poly term = p_Init(r); |
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138 | pNext( term ) = NULL; |
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139 | for ( int i = 1; i <= r->N; i++ ) |
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140 | p_SetExp( term, i, exp[i], r); |
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141 | //if (rRing_has_Comp(r)) p_SetComp(term, 0, r); // done by p_Init |
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142 | if ( f.isImm() ) |
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143 | pGetCoeff( term ) = n_Init( f.intval(), r ); |
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144 | else |
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145 | { |
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146 | number z=ALLOC_RNUMBER(); |
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147 | #if defined(LDEBUG) |
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148 | z->debug=123456; |
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149 | #endif |
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150 | gmp_numerator( f, z->z ); |
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151 | if ( f.den().isOne() ) |
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152 | z->s = 3; |
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153 | else |
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154 | { |
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155 | gmp_denominator( f, z->n ); |
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156 | z->s = 0; |
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157 | nlNormalize(z); |
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158 | } |
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159 | pGetCoeff( term ) = z; |
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160 | } |
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161 | p_Setm( term, r ); |
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162 | if ( n_IsZero(pGetCoeff(term), r) ) |
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163 | { |
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164 | p_Delete(&term,r); |
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165 | } |
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166 | else |
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167 | { |
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168 | sBucket_Merge_p(result,term,1); |
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169 | } |
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170 | } |
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171 | } |
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172 | |
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173 | |
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174 | CanonicalForm convSingPFactoryP( poly p, const ring r ) |
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175 | { |
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176 | CanonicalForm result = 0; |
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177 | int e, n = rVar(r); |
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178 | |
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179 | while ( p!=NULL) |
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180 | { |
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181 | CanonicalForm term; |
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182 | /* does only work for finite fields */ |
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183 | if ( rField_is_Zp(r) ) |
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184 | { |
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185 | term = npInt( pGetCoeff( p ),r ); |
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186 | } |
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187 | else if (rField_is_Q(r)) |
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188 | { |
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189 | if ( SR_HDL(pGetCoeff( p )) & SR_INT ) |
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190 | term = SR_TO_INT( pGetCoeff( p ) ); |
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191 | else |
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192 | { |
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193 | if ( pGetCoeff( p )->s == 3 ) |
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194 | { |
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195 | lint dummy; |
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196 | mpz_init_set( &dummy, (pGetCoeff( p )->z) ); |
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197 | term = make_cf( dummy ); |
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198 | } |
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199 | else |
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200 | { |
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201 | // assume s==0 or s==1 |
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202 | lint num, den; |
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203 | On(SW_RATIONAL); |
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204 | mpz_init_set( &num, (pGetCoeff( p )->z) ); |
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205 | mpz_init_set( &den, (pGetCoeff( p )->n) ); |
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206 | term = make_cf( num, den, ( pGetCoeff( p )->s != 1 )); |
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207 | } |
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208 | } |
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209 | } |
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210 | else |
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211 | { |
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212 | WerrorS("conversion error"); |
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213 | return result; |
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214 | } |
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215 | for ( int i = n; i >0; i-- ) |
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216 | { |
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217 | if ( (e = p_GetExp( p, i, r)) != 0 ) |
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218 | term *= power( Variable( i ), e ); |
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219 | } |
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220 | result += term; |
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221 | pIter( p ); |
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222 | } |
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223 | return result; |
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224 | } |
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225 | |
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226 | CanonicalForm convSingAPFactoryAP ( poly p , const Variable & a, const ring r) |
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227 | { |
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228 | CanonicalForm result = 0; |
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229 | int e, n = pVariables; |
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230 | int off=rPar(currRing); |
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231 | |
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232 | On(SW_RATIONAL); |
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233 | while ( p!=NULL) |
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234 | { |
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235 | CanonicalForm term=convSingAFactoryA(((lnumber)pGetCoeff(p))->z,a, r); |
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236 | for ( int i = 1; i <= n; i++ ) |
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237 | { |
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238 | if ( (e = pGetExp( p, i )) != 0 ) |
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239 | term *= power( Variable( i + off), e ); |
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240 | } |
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241 | result += term; |
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242 | pIter( p ); |
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243 | } |
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244 | return result; |
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245 | } |
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246 | |
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247 | static void |
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248 | convRecAP_R ( const CanonicalForm & f, int * exp, poly & result, int par_start, int var_start, const ring r) ; |
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249 | |
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250 | poly convFactoryAPSingAP_R ( const CanonicalForm & f, int par_start, int var_start, const ring r ) |
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251 | { |
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252 | int n = rVar(r)+rPar(r)+1; |
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253 | int * exp = (int *)omAlloc0(n*sizeof(int)); |
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254 | poly result = NULL; |
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255 | convRecAP_R( f, exp, result,par_start, var_start, r ); |
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256 | omFreeSize((ADDRESS)exp,n*sizeof(int)); |
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257 | return result; |
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258 | } |
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259 | |
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260 | poly convFactoryAPSingAP ( const CanonicalForm & f, const ring r ) |
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261 | { |
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262 | return convFactoryAPSingAP_R(f,0,rPar(r),r); |
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263 | } |
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264 | |
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265 | static void convRecAP_R ( const CanonicalForm & f, int * exp, poly & result, int par_start, int var_start, const ring r ) |
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266 | { |
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267 | if (f.isZero()) |
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268 | return; |
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269 | if ( ! f.inCoeffDomain() ) |
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270 | { |
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271 | int l = f.level(); |
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272 | for ( CFIterator i = f; i.hasTerms(); i++ ) |
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273 | { |
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274 | exp[l] = i.exp(); |
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275 | convRecAP_R( i.coeff(), exp, result, par_start, var_start, r); |
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276 | } |
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277 | exp[l] = 0; |
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278 | } |
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279 | else |
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280 | { |
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281 | napoly z=(napoly)convFactoryASingA( f,r ); |
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282 | if (z!=NULL) |
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283 | { |
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284 | poly term = p_Init(r); |
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285 | pNext( term ) = NULL; |
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286 | int i; |
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287 | for ( i = rVar(r); i>0 ; i-- ) |
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288 | p_SetExp( term, i , exp[i+var_start],r); |
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289 | //if (rRing_has_Comp(currRing->algring)) p_SetComp(term, 0, currRing->algring); // done by pInit |
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290 | if (par_start==0) |
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291 | { |
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292 | for ( i = 1; i <= var_start; i++ ) |
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293 | //z->e[i-1]+=exp[i]; |
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294 | p_AddExp(z,i,exp[i],r->algring); |
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295 | } |
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296 | else |
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297 | { |
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298 | for ( i = par_start+1; i <= var_start+rPar(currRing); i++ ) |
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299 | //z->e[i-1]+=exp[i]; |
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300 | p_AddExp(z,i,exp[i-par_start],r->algring); |
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301 | } |
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302 | pGetCoeff(term)=(number)ALLOC0_LNUMBER(); |
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303 | ((lnumber)pGetCoeff(term))->z=z; |
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304 | p_Setm( term,r ); |
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305 | result = p_Add_q( result, term, r ); |
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306 | } |
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307 | } |
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308 | } |
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309 | |
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310 | CanonicalForm convSingAFactoryA ( napoly p , const Variable & a, const ring r ) |
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311 | { |
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312 | CanonicalForm result = 0; |
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313 | int e; |
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314 | |
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315 | while ( p!=NULL ) |
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316 | { |
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317 | CanonicalForm term; |
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318 | /* does only work for finite fields:Z/p */ |
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319 | if ( rField_is_Zp_a() ) |
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320 | { |
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321 | term = npInt( napGetCoeff( p ),r ); |
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322 | } |
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323 | else |
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324 | { |
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325 | if ( SR_HDL(napGetCoeff( p )) & SR_INT ) |
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326 | term = SR_TO_INT(napGetCoeff( p )) ; |
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327 | else |
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328 | { |
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329 | if ( napGetCoeff( p )->s == 3 ) |
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330 | { |
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331 | lint dummy; |
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332 | mpz_init_set( &dummy, (napGetCoeff( p )->z) ); |
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333 | term = make_cf( dummy ); |
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334 | } |
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335 | else |
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336 | { |
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337 | // assume s==0 or s==1 |
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338 | lint num, den; |
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339 | On(SW_RATIONAL); |
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340 | mpz_init_set( &num, (napGetCoeff( p )->z) ); |
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341 | mpz_init_set( &den, (napGetCoeff( p )->n) ); |
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342 | term = make_cf( num, den, ( napGetCoeff( p )->s != 1 )); |
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343 | } |
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344 | } |
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345 | } |
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346 | if ( (e = p_GetExp( p, 1, r->algring )) != 0 ) |
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347 | term *= power( a , e ); |
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348 | result += term; |
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349 | p = pNext( p ); |
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350 | } |
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351 | return result; |
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352 | } |
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353 | |
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354 | static number convFactoryNSingAN( const CanonicalForm &f, const ring r) |
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355 | { |
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356 | if ( f.isImm() ) |
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357 | return n_Init( f.intval(), r->algring ); |
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358 | else |
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359 | { |
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360 | number z=ALLOC_RNUMBER(); |
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361 | #if defined(LDEBUG) |
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362 | z->debug=123456; |
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363 | #endif |
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364 | gmp_numerator( f, z->z ); |
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365 | if ( f.den().isOne() ) |
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366 | { |
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367 | z->s = 3; |
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368 | } |
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369 | else |
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370 | { |
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371 | gmp_denominator( f, z->n ); |
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372 | z->s = 0; |
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373 | nlNormalize(z); |
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374 | } |
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375 | #ifdef LDEBUG |
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376 | nlDBTest(z,__FILE__,__LINE__); |
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377 | #endif |
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378 | return z; |
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379 | } |
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380 | } |
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381 | |
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382 | napoly convFactoryASingA ( const CanonicalForm & f, const ring r ) |
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383 | { |
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384 | poly a=NULL; |
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385 | poly t; |
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386 | for( CFIterator i=f; i.hasTerms(); i++) |
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387 | { |
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388 | t=napNew(); |
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389 | // pNext( t ) = NULL; //already done by napNew |
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390 | pGetCoeff(t)=convFactoryNSingAN( i.coeff(), r ); |
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391 | if (n_IsZero(napGetCoeff(t),r->algring)) |
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392 | { |
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393 | p_Delete(&t,r->algring); |
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394 | } |
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395 | else |
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396 | { |
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397 | p_SetExp(t,1,i.exp(),r->algring); |
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398 | a=p_Add_q(a,t,r->algring); |
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399 | } |
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400 | } |
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401 | if (a!=NULL) |
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402 | { |
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403 | if (r->minpoly!=NULL) |
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404 | { |
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405 | lnumber l=(lnumber)r->minpoly; |
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406 | if (p_GetExp(a,1,r->algring) >= p_GetExp(l->z,1,r->algring)) |
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407 | a = napRemainder( a, l->z); |
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408 | } |
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409 | } |
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410 | return a; |
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411 | } |
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412 | |
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413 | CanonicalForm convSingTrPFactoryP ( poly p, const ring r ) |
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414 | { |
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415 | CanonicalForm result = 0; |
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416 | int e, n = rVar(r); |
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417 | int offs = rPar(r); |
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418 | |
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419 | while ( p!=NULL ) |
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420 | { |
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421 | n_Normalize(pGetCoeff(p),r); |
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422 | CanonicalForm term=convSingPFactoryP(((lnumber)pGetCoeff(p))->z,r->algring); |
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423 | |
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424 | if ((((lnumber)pGetCoeff(p))->n!=NULL) |
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425 | && (!errorreported)) |
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426 | { |
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427 | WerrorS("conversion error: denominator!= 1"); |
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428 | } |
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429 | |
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430 | for ( int i = n; i > 0; i-- ) |
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431 | { |
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432 | if ( (e = p_GetExp( p, i,r )) != 0 ) |
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433 | term = term * power( Variable( i + offs ), e ); |
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434 | } |
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435 | result += term; |
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436 | p = pNext( p ); |
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437 | } |
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438 | return result; |
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439 | } |
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440 | |
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441 | poly convFactoryPSingTrP ( const CanonicalForm & f, const ring r ) |
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442 | { |
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443 | int n = rVar(r)+1; |
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444 | int * exp = (int*)omAlloc0(n*sizeof(int)); |
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445 | poly result = NULL; |
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446 | convRecTrP( f, exp, result , rPar(r), r ); |
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447 | omFreeSize((ADDRESS)exp,n*sizeof(int)); |
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448 | return result; |
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449 | } |
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450 | |
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451 | static void |
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452 | convRecTrP ( const CanonicalForm & f, int * exp, poly & result , int offs, const ring r) |
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453 | { |
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454 | if (f.isZero()) |
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455 | return; |
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456 | if ( f.level() > offs ) |
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457 | { |
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458 | int l = f.level(); |
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459 | for ( CFIterator i = f; i.hasTerms(); i++ ) |
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460 | { |
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461 | exp[l-offs] = i.exp(); |
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462 | convRecTrP( i.coeff(), exp, result, offs, r ); |
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463 | } |
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464 | exp[l-offs] = 0; |
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465 | } |
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466 | else |
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467 | { |
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468 | poly term = p_Init(r); |
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469 | pNext( term ) = NULL; |
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470 | for ( int i = rVar(r); i>0; i-- ) |
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471 | p_SetExp( term, i ,exp[i], r); |
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472 | //if (rRing_has_Comp(currRing)) p_SetComp(term, 0, currRing); // done by pInit |
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473 | pGetCoeff(term)=(number)ALLOC0_LNUMBER(); |
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474 | ((lnumber)pGetCoeff(term))->z=convFactoryPSingP( f, r->algring ); |
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475 | p_Setm( term,r ); |
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476 | result = p_Add_q( result, term,r ); |
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477 | } |
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478 | } |
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479 | |
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480 | number nlChineseRemainder(number *x, number *q,int rl) |
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481 | // elemenst in the array are x[0..(rl-1)], q[0..(rl-1)] |
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482 | { |
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483 | #ifdef HAVE_FACTORY |
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484 | setCharacteristic( 0 ); // only in char 0 |
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485 | CFArray X(rl), Q(rl); |
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486 | int i; |
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487 | for(i=rl-1;i>=0;i--) |
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488 | { |
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489 | X[i]=convSingNFactoryN(x[i],NULL); // may be larger MAX_INT |
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490 | Q[i]=convSingNFactoryN(q[i],NULL); // may be larger MAX_INT |
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491 | } |
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492 | CanonicalForm xnew,qnew; |
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493 | chineseRemainder(X,Q,xnew,qnew); |
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494 | number n=convFactoryNSingN(xnew,NULL); |
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495 | number p=convFactoryNSingN(qnew,NULL); |
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496 | number p2=nlIntDiv(p,nlInit(2, NULL)); |
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497 | if (nlGreater(n,p2)) |
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498 | { |
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499 | number n2=nlSub(n,p); |
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500 | nlDelete(&n,NULL); |
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501 | n=n2; |
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502 | } |
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503 | nlDelete(&p,NULL); |
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504 | nlDelete(&p2,NULL); |
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505 | return n; |
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506 | #else |
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507 | WerrorS("not implemented"); |
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508 | return nlInit(0); |
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509 | #endif |
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510 | } |
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511 | |
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512 | CanonicalForm |
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513 | convSingGFFactoryGF( poly p ) |
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514 | { |
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515 | CanonicalForm result=CanonicalForm(0); |
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516 | int e, n = pVariables; |
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517 | |
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518 | while ( p != NULL ) |
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519 | { |
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520 | CanonicalForm term; |
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521 | term = make_cf_from_gf( (int)(long)pGetCoeff( p ) ); |
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522 | //int * A=(int *)&term; |
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523 | //Print("term=%x, == 0 ?: %d\n",*A, term.isZero()); |
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524 | for ( int i = 1; i <= n; i++ ) |
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525 | { |
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526 | if ( (e = pGetExp( p, i )) != 0 ) |
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527 | term *= power( Variable( i ), e ); |
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528 | } |
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529 | result += term; |
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530 | p = pNext( p ); |
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531 | } |
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532 | return result; |
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533 | } |
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534 | |
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535 | poly |
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536 | convFactoryGFSingGF ( const CanonicalForm & f ) |
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537 | { |
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538 | // cerr << " f = " << f << endl; |
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539 | int n = pVariables+1; |
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540 | /* ASSERT( level( f ) <= pVariables, "illegal number of variables" ); */ |
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541 | int * exp = (int*)omAlloc0(n*sizeof(int)); |
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542 | poly result = NULL; |
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543 | convRecGFGF( f, exp, result ); |
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544 | omFreeSize((ADDRESS)exp,n*sizeof(int)); |
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545 | return result; |
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546 | } |
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547 | |
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548 | static void |
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549 | convRecGFGF ( const CanonicalForm & f, int * exp, poly & result ) |
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550 | { |
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551 | if (f.isZero()) |
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552 | return; |
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553 | if ( ! f.inCoeffDomain() ) |
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554 | { |
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555 | int l = f.level(); |
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556 | for ( CFIterator i = f; i.hasTerms(); i++ ) |
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557 | { |
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558 | exp[l] = i.exp(); |
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559 | convRecGFGF( i.coeff(), exp, result ); |
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560 | } |
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561 | exp[l] = 0; |
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562 | } |
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563 | else |
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564 | { |
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565 | poly term = pInit(); |
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566 | pNext( term ) = NULL; |
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567 | for ( int i = 1; i <= pVariables; i++ ) |
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568 | pSetExp( term, i, exp[i]); |
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569 | //if (rRing_has_Comp(currRing)) p_SetComp(term, 0, currRing); // done by pInit |
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570 | pGetCoeff( term ) = (number) gf_value (f); |
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571 | pSetm( term ); |
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572 | result = pAdd( result, term ); |
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573 | } |
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574 | } |
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575 | |
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576 | int convFactoryISingI( const CanonicalForm & f) |
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577 | { |
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578 | if (!f.isImm()) WerrorS("int overflow in det"); |
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579 | return f.intval(); |
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580 | } |
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581 | #endif |
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