1 | #include "mod2.h" |
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2 | #include <omalloc.h> |
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3 | #include "p_polys.h" |
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4 | #include "prCopy.h" |
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5 | #include "ideals.h" |
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6 | #include "ring.h" |
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7 | #include "febase.h" |
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8 | #include "structs.h" |
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9 | #include "polys.h" |
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10 | #include "stdlib.h" |
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11 | |
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12 | |
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13 | #include "kutil.h" |
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14 | #include "kInline.cc" |
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15 | #include "kstd1.h" |
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16 | #include "kbuckets.h" |
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17 | |
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18 | #define FULLREDUCTIONS |
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19 | #define HEAD_BIN |
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20 | //#define HOMOGENEOUS_EXAMPLE |
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21 | #define REDTAIL_S |
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22 | //#define REDTAIL_PROT |
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23 | //#define QUICK_SPOLY_TEST |
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24 | //#define DIAGONAL_GOING |
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25 | //#define RANDOM_WALK |
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26 | struct int_pair_node{ |
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27 | int_pair_node* next; |
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28 | int a; |
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29 | int b; |
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30 | }; |
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31 | #ifdef RANDOM_WALK |
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32 | int my_rand(int n){ |
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33 | //RANDOM integer beetween 0,..,n-1 |
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34 | int erg=(double(rand())/RAND_MAX) *n; |
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35 | return ((erg>=n)?erg-1:erg); |
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36 | |
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37 | } |
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38 | #endif |
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39 | enum calc_state |
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40 | { |
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41 | UNCALCULATED, |
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42 | HASTREP, |
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43 | UNIMPORTANT |
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44 | }; |
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45 | struct calc_dat |
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46 | { |
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47 | int* rep; |
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48 | char** states; |
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49 | ideal S; |
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50 | ring r; |
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51 | int* lengths; |
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52 | long* short_Exps; |
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53 | kStrategy strat; |
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54 | int** deg; |
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55 | int* T_deg; |
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56 | int* misses; |
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57 | int_pair_node* soon_free; |
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58 | #ifdef HEAD_BIN |
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59 | struct omBin_s* HeadBin; |
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60 | #endif |
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61 | int max_misses; |
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62 | int found_i; |
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63 | int found_j; |
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64 | int continue_i; |
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65 | int continue_j; |
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66 | int n; |
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67 | int skipped_i; |
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68 | int normal_forms; |
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69 | int skipped_pairs; |
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70 | int current_degree; |
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71 | int misses_counter; |
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72 | int misses_series; |
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73 | }; |
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74 | bool find_next_pair(calc_dat* c); |
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75 | void shorten_tails(calc_dat* c, poly monom); |
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76 | void replace_pair(int & i, int & j, calc_dat* c); |
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77 | void initial_data(calc_dat* c); |
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78 | void add_to_basis(poly h, calc_dat* c); |
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79 | void do_this_spoly_stuff(int i,int j,calc_dat* c); |
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80 | ideal t_rep_gb(ring r,ideal arg_I); |
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81 | bool has_t_rep(const int & arg_i, const int & arg_j, calc_dat* state); |
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82 | int* make_connections(int from, poly bound, calc_dat* c); |
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83 | int* make_connections(int from, int to, poly bound, calc_dat* c); |
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84 | void now_t_rep(int arg_i, int arg_j, calc_dat* c); |
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85 | int pLcmDeg(poly a, poly b); |
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86 | int simple_posInS (kStrategy strat, poly p,int len); |
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87 | |
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88 | bool find_next_pair(calc_dat* c) |
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89 | { |
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90 | int start_i,start_j,i,j; |
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91 | start_i=0; |
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92 | start_j=-1; |
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93 | #ifndef HOMOGENEOUS_EXAMPLE |
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94 | if (c->misses_series>80){ |
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95 | c->current_degree++; |
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96 | c->misses_series=0; |
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97 | } |
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98 | #endif |
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99 | start_i=c->continue_i; |
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100 | start_j=c->continue_j; |
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101 | #ifndef DIAGONAL_GOING |
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102 | for (int i=start_i;i<c->n;i++){ |
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103 | if (c->T_deg[i]>c->current_degree) |
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104 | { |
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105 | c->skipped_pairs++; |
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106 | continue; |
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107 | } |
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108 | for(int j=(i==start_i)?start_j+1:0;j<i;j++){ |
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109 | // printf("searching at %d,%d",i,j); |
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110 | if (c->misses_counter>=2) { |
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111 | c->skipped_pairs++; |
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112 | break; |
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113 | } |
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114 | if (c->states[i][j]==UNCALCULATED){ |
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115 | if(c->deg[i][j]<=c->current_degree) |
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116 | { |
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117 | c->continue_i=c->found_i=i; |
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118 | c->continue_j=c->found_j=j; |
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119 | return true; |
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120 | } |
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121 | else |
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122 | { |
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123 | ++(c->skipped_pairs); |
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124 | } |
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125 | } |
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126 | } |
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127 | c->misses_counter=0; |
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128 | } |
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129 | |
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130 | |
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131 | if (!((start_i==1) &&(start_j==0))){ |
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132 | c->continue_i=1; |
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133 | c->continue_j=0; |
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134 | return find_next_pair(c); |
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135 | } |
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136 | |
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137 | #else |
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138 | int z=0; |
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139 | i=start_i; |
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140 | j=start_j; |
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141 | z=start_i+start_j; |
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142 | while(z<=(2*c->n-3)){ |
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143 | |
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144 | while(i>j){ |
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145 | if(i>=c->n) { |
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146 | if (c->skipped_i<0) c->skipped_i=i; |
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147 | } else{ |
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148 | if(c->states[i][j]==UNCALCULATED){ |
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149 | if (c->deg[i][j]<=c->current_degree) |
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150 | { |
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151 | c->continue_i=c->found_i=i; |
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152 | c->continue_j=c->found_j=j; |
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153 | return true; |
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154 | } |
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155 | else |
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156 | { |
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157 | ++(c->skipped_pairs); |
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158 | } |
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159 | } |
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160 | } |
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161 | --i; |
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162 | ++j; |
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163 | } |
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164 | ++z; |
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165 | i=z; |
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166 | j=0; |
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167 | } |
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168 | #endif |
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169 | if (c->skipped_pairs>0){ |
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170 | ++(c->current_degree); |
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171 | c->skipped_pairs=0; |
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172 | c->continue_i=0; |
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173 | c->continue_j=0; |
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174 | return find_next_pair(c); |
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175 | } |
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176 | return false; |
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177 | } |
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178 | void move_forward_in_S(int old_pos, int new_pos,kStrategy strat) |
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179 | { |
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180 | poly p=strat->S[old_pos]; |
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181 | int ecart=strat->ecartS[old_pos]; |
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182 | long sev=strat->sevS[old_pos]; |
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183 | int s_2_r=strat->S_2_R[old_pos]; |
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184 | int length=strat->lenS[old_pos]; |
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185 | int i; |
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186 | for (i=old_pos; i>new_pos; i--) |
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187 | { |
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188 | strat->S[i] = strat->S[i-1]; |
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189 | strat->ecartS[i] = strat->ecartS[i-1]; |
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190 | strat->sevS[i] = strat->sevS[i-1]; |
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191 | strat->S_2_R[i] = strat->S_2_R[i-1]; |
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192 | } |
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193 | if (strat->lenS!=NULL) |
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194 | for (i=old_pos; i>new_pos; i--) |
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195 | strat->lenS[i] = strat->lenS[i-1]; |
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196 | |
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197 | strat->S[new_pos]=p; |
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198 | strat->ecartS[new_pos]=ecart; |
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199 | strat->sevS[new_pos]=sev; |
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200 | strat->S_2_R[new_pos]=s_2_r; |
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201 | strat->lenS[new_pos]=length; |
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202 | } |
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203 | void replace_pair(int & i, int & j, calc_dat* c) |
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204 | { |
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205 | c->soon_free=NULL; |
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206 | int curr_deg; |
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207 | poly lm=pOne(); |
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208 | |
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209 | pLcm(c->S->m[i], c->S->m[j], lm); |
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210 | pSetm(lm); |
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211 | int deciding_deg= pFDeg(lm); |
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212 | int* i_con =make_connections(i,j,lm,c); |
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213 | int z=0; |
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214 | |
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215 | for (int n=0;((n<c->n) && (i_con[n]>=0));n++){ |
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216 | if (i_con[n]==j){ |
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217 | // curr_deg=pFDeg(lm); |
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218 | // for(int z1=0;((z1<c->n) && (i_con[z1]>=0));z1++) |
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219 | // for (int z2=z1+1;((z2<c->n)&&(i_con[z2]>=0));z2++) |
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220 | // { |
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221 | // pLcm(c->S->m[i_con[z1]], c->S->m[i_con[z2]], lm); |
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222 | // pSetm(lm); |
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223 | // if (pFDeg(lm)==curr_deg) |
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224 | // now_t_rep(i_con[z1],i_con[z2],c); |
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225 | // } |
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226 | now_t_rep(i,j,c); |
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227 | omfree(i_con); |
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228 | p_Delete(&lm,c->r); |
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229 | return; |
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230 | } |
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231 | } |
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232 | |
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233 | int* j_con =make_connections(j,lm,c); |
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234 | i= i_con[0]; |
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235 | j=j_con[0]; |
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236 | if(c->n>1){ |
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237 | if (i_con[1]>=0) |
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238 | i=i_con[1]; |
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239 | else { |
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240 | if (j_con[1]>=0) |
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241 | j=j_con[1]; |
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242 | } |
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243 | } |
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244 | pLcm(c->S->m[i], c->S->m[j], lm); |
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245 | pSetm(lm); |
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246 | poly short_s; |
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247 | curr_deg=pFDeg(lm); |
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248 | int_pair_node* last=NULL; |
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249 | |
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250 | for (int n=0;((n<c->n) && (j_con[n]>=0));n++){ |
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251 | for (int m=0;((m<c->n) && (i_con[m]>=0));m++){ |
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252 | pLcm(c->S->m[i_con[m]], c->S->m[j_con[n]], lm); |
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253 | pSetm(lm); |
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254 | if (pFDeg(lm)>=deciding_deg) |
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255 | { |
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256 | int_pair_node* h= (int_pair_node*)omalloc(sizeof(int_pair_node)); |
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257 | if (last!=NULL) |
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258 | last->next=h; |
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259 | else |
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260 | c->soon_free=h; |
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261 | h->next=NULL; |
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262 | h->a=i_con[m]; |
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263 | h->b=j_con[n]; |
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264 | last=h; |
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265 | } |
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266 | // if ((comp_deg<curr_deg) |
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267 | // || |
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268 | // ((comp_deg==curr_deg) && |
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269 | short_s=ksCreateShortSpoly(c->S->m[i_con[m]],c->S->m[j_con[n]],c->r); |
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270 | if (short_s==NULL) { |
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271 | i=i_con[m]; |
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272 | j=j_con[n]; |
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273 | now_t_rep(i_con[m],j_con[n],c); |
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274 | p_Delete(&lm,c->r); |
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275 | omfree(i_con); |
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276 | omfree(j_con); |
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277 | |
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278 | return; |
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279 | |
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280 | } |
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281 | #ifdef QUICK_SPOLY_TEST |
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282 | |
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283 | for (int dz=0;dz<=c->n;dz++){ |
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284 | if (dz==c->n) { |
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285 | //have found not head reducing pair |
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286 | i=i_con[m]; |
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287 | j=j_con[n]; |
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288 | p_Delete(&short_s,c->r); |
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289 | p_Delete(&lm,c->r); |
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290 | omfree(i_con); |
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291 | omfree(j_con); |
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292 | |
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293 | return; |
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294 | } |
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295 | if (p_LmDivisibleBy(c->S->m[dz],short_s,c->r)) break; |
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296 | } |
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297 | #endif |
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298 | int comp_deg(pFDeg(short_s)); |
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299 | p_Delete(&short_s,c->r); |
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300 | if ((comp_deg<curr_deg) |
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301 | || |
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302 | ((comp_deg==curr_deg) && |
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303 | (c->misses[i]+c->misses[j] |
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304 | <= |
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305 | c->misses[i_con[m]]+c->misses[j_con[n]]))) |
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306 | // if ((comp_deg<curr_deg) |
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307 | // || |
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308 | // ((comp_deg==curr_deg) && |
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309 | // (c->lengths[i]+c->lengths[j] |
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310 | // <= |
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311 | // c->lengths[i_con[m]]+c->lengths[j_con[n]]))) |
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312 | |
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313 | { |
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314 | curr_deg=comp_deg; |
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315 | i=i_con[m]; |
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316 | j=j_con[n]; |
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317 | } |
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318 | } |
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319 | } |
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320 | p_Delete(&lm,c->r); |
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321 | omfree(i_con); |
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322 | omfree(j_con); |
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323 | return; |
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324 | } |
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325 | int* make_connections(int from, poly bound, calc_dat* c) |
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326 | { |
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327 | ideal I=c->S; |
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328 | int s=pFDeg(bound); |
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329 | int* cans=(int*) omalloc(c->n*sizeof(int)); |
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330 | int* connected=(int*) omalloc(c->n*sizeof(int)); |
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331 | int cans_length=0; |
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332 | connected[0]=from; |
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333 | int connected_length=1; |
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334 | long neg_bounds_short= ~p_GetShortExpVector(bound,c->r); |
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335 | for (int i=0;i<c->n;i++){ |
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336 | if (c->T_deg[i]>s) continue; |
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337 | if (i!=from){ |
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338 | if(p_LmShortDivisibleBy(I->m[i],c->short_Exps[i],bound,neg_bounds_short,c->r)){ |
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339 | cans[cans_length]=i; |
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340 | cans_length++; |
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341 | } |
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342 | } |
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343 | } |
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344 | int not_yet_found=cans_length; |
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345 | int con_checked=0; |
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346 | int pos; |
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347 | while((not_yet_found>0) && (con_checked<connected_length)){ |
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348 | pos=connected[con_checked]; |
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349 | for(int i=0;i<cans_length;i++){ |
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350 | if (cans[i]<0) continue; |
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351 | if (has_t_rep(pos,cans[i],c)){ |
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352 | |
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353 | connected[connected_length]=cans[i]; |
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354 | connected_length++; |
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355 | cans[i]=-1; |
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356 | --not_yet_found; |
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357 | |
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358 | } |
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359 | } |
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360 | con_checked++; |
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361 | } |
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362 | if (connected_length<c->n){ |
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363 | connected[connected_length]=-1; |
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364 | } |
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365 | omfree(cans); |
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366 | return connected; |
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367 | } |
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368 | int* make_connections(int from, int to, poly bound, calc_dat* c) |
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369 | { |
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370 | ideal I=c->S; |
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371 | int s=pFDeg(bound); |
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372 | int* cans=(int*) omalloc(c->n*sizeof(int)); |
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373 | int* connected=(int*) omalloc(c->n*sizeof(int)); |
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374 | cans[0]=to; |
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375 | int cans_length=1; |
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376 | connected[0]=from; |
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377 | int last_cans_pos=-1; |
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378 | int connected_length=1; |
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379 | long neg_bounds_short= ~p_GetShortExpVector(bound,c->r); |
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380 | // for (int i=0;i<c->n;i++){ |
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381 | // if (c->T_deg[i]>s) continue; |
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382 | // if (i!=from){ |
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383 | // if(p_LmShortDivisibleBy(I->m[i],c->short_Exps[i],bound,neg_bounds_short,c->r)){ |
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384 | // cans[cans_length]=i; |
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385 | // cans_length++; |
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386 | // } |
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387 | // } |
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388 | // } |
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389 | int not_yet_found=cans_length; |
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390 | int con_checked=0; |
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391 | int pos; |
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392 | bool can_find_more=true; |
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393 | while(((not_yet_found>0) && (con_checked<connected_length))||can_find_more){ |
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394 | if ((con_checked<connected_length)&& (not_yet_found>0)){ |
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395 | pos=connected[con_checked]; |
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396 | for(int i=0;i<cans_length;i++){ |
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397 | if (cans[i]<0) continue; |
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398 | if (has_t_rep(pos,cans[i],c)){ |
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399 | |
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400 | connected[connected_length]=cans[i]; |
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401 | connected_length++; |
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402 | cans[i]=-1; |
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403 | --not_yet_found; |
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404 | |
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405 | if (connected[connected_length-1]==to){ |
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406 | if (connected_length<c->n){ |
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407 | connected[connected_length]=-1; |
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408 | } |
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409 | |
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410 | omfree(cans); |
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411 | return connected; |
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412 | } |
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413 | } |
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414 | } |
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415 | con_checked++; |
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416 | } else { |
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417 | |
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418 | for(last_cans_pos++;last_cans_pos<=c->n;last_cans_pos++){ |
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419 | if (last_cans_pos==c->n){ |
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420 | if (connected_length<c->n){ |
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421 | connected[connected_length]=-1; |
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422 | } |
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423 | omfree(cans); |
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424 | return connected; |
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425 | } |
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426 | if ((last_cans_pos==from)||(last_cans_pos==to)) |
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427 | continue; |
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428 | if(p_LmShortDivisibleBy(I->m[last_cans_pos],c->short_Exps[last_cans_pos],bound,neg_bounds_short,c->r)){ |
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429 | cans[cans_length]=last_cans_pos; |
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430 | cans_length++; |
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431 | break; |
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432 | } |
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433 | } |
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434 | not_yet_found++; |
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435 | for (int i=0;i<con_checked;i++){ |
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436 | if (has_t_rep(connected[i],last_cans_pos,c)){ |
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437 | |
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438 | connected[connected_length]=last_cans_pos; |
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439 | connected_length++; |
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440 | cans[cans_length-1]=-1; |
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441 | |
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442 | --not_yet_found; |
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443 | if (connected[connected_length-1]==to){ |
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444 | if (connected_length<c->n){ |
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445 | connected[connected_length]=-1; |
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446 | } |
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447 | |
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448 | omfree(cans); |
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449 | return connected; |
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450 | } |
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451 | break; |
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452 | } |
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453 | |
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454 | } |
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455 | } |
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456 | } |
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457 | if (connected_length<c->n){ |
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458 | connected[connected_length]=-1; |
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459 | } |
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460 | |
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461 | omfree(cans); |
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462 | return connected; |
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463 | } |
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464 | #ifdef HEAD_BIN |
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465 | static inline poly p_MoveHead(poly p, omBin b) |
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466 | { |
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467 | poly np; |
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468 | omTypeAllocBin(poly, np, b); |
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469 | memmove(np, p, b->sizeW*sizeof(long)); |
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470 | omFreeBinAddr(p); |
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471 | return np; |
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472 | } |
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473 | #endif |
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474 | void initial_data(calc_dat* c){ |
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475 | void* h; |
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476 | int i,j; |
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477 | c->misses_series=0; |
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478 | c->soon_free=NULL; |
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479 | c->misses_counter=0; |
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480 | c->max_misses=0; |
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481 | c->normal_forms=0; |
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482 | c->current_degree=1; |
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483 | c->skipped_pairs=0; |
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484 | int n=c->S->idelems(); |
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485 | c->n=n; |
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486 | c->T_deg=(int*) omalloc(n*sizeof(int)); |
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487 | c->continue_i=0; |
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488 | c->continue_j=0; |
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489 | c->skipped_i=-1; |
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490 | #ifdef HEAD_BIN |
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491 | c->HeadBin=omGetSpecBin(POLYSIZE + (currRing->ExpL_Size)*sizeof(long)); |
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492 | #endif |
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493 | /* omUnGetSpecBin(&(c->HeadBin)); */ |
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494 | h=omalloc(n*sizeof(char*)); |
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495 | if (h!=NULL) |
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496 | c->states=(char**) h; |
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497 | else |
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498 | exit(1); |
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499 | c->misses=(int*) omalloc(n*sizeof(int)); |
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500 | c->deg=(int **) omalloc(n*sizeof(int*)); |
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501 | h=omalloc(n*sizeof(int)); |
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502 | if (h!=NULL) |
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503 | c->lengths=(int*) h; |
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504 | else |
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505 | exit(1); |
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506 | |
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507 | h=omalloc(n*sizeof(int)); |
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508 | if (h!=NULL) |
---|
509 | c->rep=(int*) h; |
---|
510 | else |
---|
511 | exit(1); |
---|
512 | c->short_Exps=(long*) omalloc(n*sizeof(long)); |
---|
513 | for (i=0;i<n;i++) |
---|
514 | { |
---|
515 | #ifdef HEAD_BIN |
---|
516 | c->S->m[i]=p_MoveHead(c->S->m[i],c->HeadBin); |
---|
517 | #endif |
---|
518 | c->T_deg[i]=pFDeg(c->S->m[i]); |
---|
519 | c->lengths[i]=pLength(c->S->m[i]); |
---|
520 | c->misses[i]=0; |
---|
521 | c->states[i]=(char *)omAlloc((i+1)*sizeof(char)); |
---|
522 | c->deg[i]=(int*) omAlloc((i+1)*sizeof(int)); |
---|
523 | for (j=0;j<i;j++){ |
---|
524 | //check product criterion |
---|
525 | if (pHasNotCF(c->S->m[i],c->S->m[j])){ |
---|
526 | c->states[i][j]=HASTREP; |
---|
527 | } else { |
---|
528 | c->states[i][j]=UNCALCULATED; |
---|
529 | } |
---|
530 | c->deg[i][j]=pLcmDeg(c->S->m[i],c->S->m[j]); |
---|
531 | } |
---|
532 | if ((c->lengths[i]==1) && (c->lengths[j]==1)) |
---|
533 | c->states[i][j]=HASTREP; |
---|
534 | c->rep[i]=i; |
---|
535 | c->short_Exps[i]=p_GetShortExpVector(c->S->m[i],c->r); |
---|
536 | |
---|
537 | } |
---|
538 | |
---|
539 | |
---|
540 | c->strat=new skStrategy; |
---|
541 | c->strat->syzComp = 0; |
---|
542 | initBuchMoraCrit(c->strat); |
---|
543 | initBuchMoraPos(c->strat); |
---|
544 | c->strat->initEcart = initEcartBBA; |
---|
545 | c->strat->enterS = enterSBba; |
---|
546 | c->strat->sl = -1; |
---|
547 | /* initS(c->S,NULL,c->strat); */ |
---|
548 | /* intS start: */ |
---|
549 | i=((i+IDELEMS(c->S)+15)/16)*16; |
---|
550 | c->strat->ecartS=(intset)omAlloc(i*sizeof(int)); /*initec(i);*/ |
---|
551 | c->strat->sevS=(unsigned long*)omAlloc0(i*sizeof(unsigned long)); |
---|
552 | /*initsevS(i);*/ |
---|
553 | c->strat->S_2_R=(int*)omAlloc0(i*sizeof(int));/*initS_2_R(i);*/ |
---|
554 | c->strat->fromQ=NULL; |
---|
555 | c->strat->Shdl=idInit(i,1); |
---|
556 | c->strat->S=c->strat->Shdl->m; |
---|
557 | c->strat->lenS=(int*)omAlloc0(i*sizeof(int)); |
---|
558 | for (i=0; i<IDELEMS(c->S); i++) |
---|
559 | { |
---|
560 | int pos; |
---|
561 | assume (c->S->m[i]!=NULL); |
---|
562 | LObject h; |
---|
563 | h.p = c->S->m[i]; |
---|
564 | h.pNorm(); |
---|
565 | c->strat->initEcart(&h); |
---|
566 | assume(c->lengths[i]==pLength(h.p)); |
---|
567 | if (c->strat->sl==-1) pos=0; |
---|
568 | else pos = simple_posInS(c->strat,h.p,c->lengths[i]); |
---|
569 | h.sev = pGetShortExpVector(h.p); |
---|
570 | c->strat->enterS(h,pos,c->strat); |
---|
571 | c->strat->lenS[pos]=c->lengths[i]; |
---|
572 | } |
---|
573 | //c->strat->lenS=(int*)omAlloc0(IDELEMS(c->strat->Shdl)*sizeof(int)); |
---|
574 | //for (i=c->strat->sl;i>=0;i--) |
---|
575 | //{ |
---|
576 | // pNorm(c->strat->S[i]); |
---|
577 | // c->strat->lenS[i]=pLength(c->strat->S[i]); |
---|
578 | //} |
---|
579 | /* initS end */ |
---|
580 | } |
---|
581 | int simple_posInS (kStrategy strat, poly p,int len) |
---|
582 | { |
---|
583 | if(strat->sl==-1) return 0; |
---|
584 | polyset set=strat->S; |
---|
585 | intset setL=strat->lenS; |
---|
586 | int length=strat->sl; |
---|
587 | int i; |
---|
588 | int an = 0; |
---|
589 | int en= length; |
---|
590 | |
---|
591 | if ((len>setL[length]) |
---|
592 | || ((len==setL[length]) && (pLmCmp(set[length],p)== -1))) |
---|
593 | return length+1; |
---|
594 | |
---|
595 | loop |
---|
596 | { |
---|
597 | if (an >= en-1) |
---|
598 | { |
---|
599 | if ((len<setL[an]) |
---|
600 | || ((len==setL[length]) && (pLmCmp(set[an],p) == 1))) return an; |
---|
601 | return en; |
---|
602 | } |
---|
603 | i=(an+en) / 2; |
---|
604 | if ((len<setL[i]) |
---|
605 | || ((len==setL[i]) && (pLmCmp(set[i],p) == 1))) en=i; |
---|
606 | //else if ((len>setL[i]) |
---|
607 | //|| ((len==setL[i]) && (pLmCmp(set[i],p) == -1))) an=i; |
---|
608 | else an=i; |
---|
609 | } |
---|
610 | } |
---|
611 | /*2 |
---|
612 | *if the leading term of p |
---|
613 | *divides the leading term of some S[i] it will be canceled |
---|
614 | */ |
---|
615 | static inline void clearS (poly p, unsigned long p_sev,int l, int* at, int* k, |
---|
616 | kStrategy strat) |
---|
617 | { |
---|
618 | assume(p_sev == pGetShortExpVector(p)); |
---|
619 | if (!pLmShortDivisibleBy(p,p_sev, strat->S[*at], ~ strat->sevS[*at])) return; |
---|
620 | if (l>=strat->lenS[*at]) return; |
---|
621 | PrintS("!");mflush(); |
---|
622 | //pDelete(&strat->S[*at]); |
---|
623 | deleteInS((*at),strat); |
---|
624 | (*at)--; |
---|
625 | (*k)--; |
---|
626 | } |
---|
627 | void add_to_basis(poly h, int i_pos, int j_pos,calc_dat* c) |
---|
628 | { |
---|
629 | BOOLEAN R_found=FALSE; |
---|
630 | void* hp; |
---|
631 | PrintS("s"); |
---|
632 | ++(c->n); |
---|
633 | ++(c->S->ncols); |
---|
634 | int i,j; |
---|
635 | i=c->n-1; |
---|
636 | c->T_deg=(int*) omrealloc(c->T_deg,c->n*sizeof(int)); |
---|
637 | c->T_deg[i]=pFDeg(h); |
---|
638 | hp=omrealloc(c->rep, c->n *sizeof(int)); |
---|
639 | if (hp!=NULL){ |
---|
640 | c->rep=(int*) hp; |
---|
641 | } else { |
---|
642 | exit(1); |
---|
643 | } |
---|
644 | c->short_Exps=(long *) omrealloc(c->short_Exps ,c->n*sizeof(long)); |
---|
645 | |
---|
646 | hp=omrealloc(c->lengths, c->n *sizeof(int)); |
---|
647 | if (hp!=NULL){ |
---|
648 | c->lengths=(int*) hp; |
---|
649 | } else { |
---|
650 | exit(1); |
---|
651 | } |
---|
652 | c->misses=(int*) omrealloc(c->misses,c->n*sizeof(int)); |
---|
653 | c->misses[i]=0; |
---|
654 | c->lengths[i]=pLength(h); |
---|
655 | hp=omrealloc(c->states, c->n * sizeof(char*)); |
---|
656 | if (hp!=NULL){ |
---|
657 | c->states=(char**) hp; |
---|
658 | } else { |
---|
659 | exit(1); |
---|
660 | } |
---|
661 | c->deg=(int**) omrealloc(c->deg, c->n * sizeof(int*)); |
---|
662 | c->rep[i]=i; |
---|
663 | hp=omalloc(i*sizeof(char)); |
---|
664 | if (hp!=NULL){ |
---|
665 | c->states[i]=(char*) hp; |
---|
666 | } else { |
---|
667 | exit(1); |
---|
668 | } |
---|
669 | c->deg[i]=(int*) omalloc(i*sizeof(int)); |
---|
670 | hp=omrealloc(c->S->m,c->n*sizeof(poly)); |
---|
671 | if (hp!=NULL){ |
---|
672 | c->S->m=(poly*) hp; |
---|
673 | } else { |
---|
674 | exit(1); |
---|
675 | } |
---|
676 | c->S->m[i]=h; |
---|
677 | c->short_Exps[i]=p_GetShortExpVector(h,c->r); |
---|
678 | for (j=0;j<i;j++){ |
---|
679 | c->deg[i][j]=pLcmDeg(c->S->m[i],c->S->m[j]); |
---|
680 | if (c->rep[j]==j){ |
---|
681 | //check product criterion |
---|
682 | |
---|
683 | c->states[i][j]=UNCALCULATED; |
---|
684 | |
---|
685 | |
---|
686 | //lies I[i] under I[j] ? |
---|
687 | if(p_LmShortDivisibleBy(c->S->m[i],c->short_Exps[i],c->S->m[j],~(c->short_Exps[j]),c->r)){ |
---|
688 | c->rep[j]=i; |
---|
689 | PrintS("R"); R_found=TRUE; |
---|
690 | |
---|
691 | c->misses[i_pos]--; |
---|
692 | c->misses[j_pos]--; |
---|
693 | for(int z=0;z<j;z++){ |
---|
694 | if (c->states[j][z]==UNCALCULATED){ |
---|
695 | c->states[j][z]=UNIMPORTANT; |
---|
696 | } |
---|
697 | } |
---|
698 | for(int z=j+1;z<i;z++){ |
---|
699 | if (c->states[z][j]==UNCALCULATED){ |
---|
700 | c->states[z][j]=UNIMPORTANT; |
---|
701 | } |
---|
702 | } |
---|
703 | } |
---|
704 | } |
---|
705 | else { |
---|
706 | c->states[i][j]=UNIMPORTANT; |
---|
707 | } |
---|
708 | if ((c->lengths[i]==1) && (c->lengths[j]==1)) |
---|
709 | c->states[i][j]=HASTREP; |
---|
710 | else if (pHasNotCF(c->S->m[i],c->S->m[j])) |
---|
711 | c->states[i][j]=HASTREP; |
---|
712 | |
---|
713 | } |
---|
714 | if (c->skipped_i>0){ |
---|
715 | c->continue_i=c->skipped_i; |
---|
716 | c->continue_j=0; |
---|
717 | c->skipped_i=-1; |
---|
718 | } |
---|
719 | |
---|
720 | //i=posInS(c->strat,c->strat->sl,h,0 /*ecart*/); |
---|
721 | i=simple_posInS(c->strat,h,c->lengths[c->n-1]); |
---|
722 | |
---|
723 | LObject P; memset(&P,0,sizeof(P)); |
---|
724 | P.tailRing=c->r; |
---|
725 | P.p=h; /*p_Copy(h,c->r);*/ |
---|
726 | P.FDeg=pFDeg(P.p,c->r); |
---|
727 | if (!rField_is_Zp(c->r)) pCleardenom(P.p); |
---|
728 | //enterT(P,c->strat,-1); |
---|
729 | c->strat->enterS(P,i,c->strat); |
---|
730 | c->strat->lenS[i]=/*pLength(c->strat->S[i]);*/ c->lengths[c->n-1]; |
---|
731 | pNorm(c->strat->S[i]); |
---|
732 | if (0 /*R_found && (i<c->strat->sl)*/) |
---|
733 | { |
---|
734 | i++; |
---|
735 | unsigned long h_sev = pGetShortExpVector(h); |
---|
736 | loop |
---|
737 | { |
---|
738 | if (i>c->strat->sl) break; |
---|
739 | clearS(h,h_sev,c->lengths[c->n-1], &i,&(c->strat->sl),c->strat); |
---|
740 | i++; |
---|
741 | } |
---|
742 | } |
---|
743 | if (c->lengths[c->n-1]==1) |
---|
744 | shorten_tails(c,c->S->m[c->n-1]); |
---|
745 | //you should really update c->lengths, c->strat->lenS, and the oder of polys in strat if you sort after lengths |
---|
746 | |
---|
747 | //for(i=c->strat->sl; i>0;i--) |
---|
748 | // if(c->strat->lenS[i]<c->strat->lenS[i-1]) printf("fehler bei %d\n",i); |
---|
749 | } |
---|
750 | #if 0 |
---|
751 | static poly redNF (poly h,kStrategy strat) |
---|
752 | { |
---|
753 | int j = 0; |
---|
754 | int z = 3; |
---|
755 | unsigned long not_sev; |
---|
756 | |
---|
757 | if (0 > strat->sl) |
---|
758 | { |
---|
759 | return h; |
---|
760 | } |
---|
761 | not_sev = ~ pGetShortExpVector(h); |
---|
762 | loop |
---|
763 | { |
---|
764 | if (pLmShortDivisibleBy(strat->S[j], strat->sevS[j], h, not_sev)) |
---|
765 | { |
---|
766 | //if (strat->interpt) test_int_std(strat->kIdeal); |
---|
767 | /*- compute the s-polynomial -*/ |
---|
768 | #ifdef KDEBUG |
---|
769 | if (TEST_OPT_DEBUG) |
---|
770 | { |
---|
771 | PrintS("red:"); |
---|
772 | wrp(h); |
---|
773 | PrintS(" with "); |
---|
774 | wrp(strat->S[j]); |
---|
775 | } |
---|
776 | #endif |
---|
777 | h = ksOldSpolyRed(strat->S[j],h,strat->kNoether); |
---|
778 | #ifdef KDEBUG |
---|
779 | if (TEST_OPT_DEBUG) |
---|
780 | { |
---|
781 | PrintS("\nto:"); |
---|
782 | wrp(h); |
---|
783 | PrintLn(); |
---|
784 | } |
---|
785 | #endif |
---|
786 | if (h == NULL) return NULL; |
---|
787 | z++; |
---|
788 | if (z>=10) |
---|
789 | { |
---|
790 | z=0; |
---|
791 | pNormalize(h); |
---|
792 | } |
---|
793 | /*- try to reduce the s-polynomial -*/ |
---|
794 | j = 0; |
---|
795 | not_sev = ~ pGetShortExpVector(h); |
---|
796 | } |
---|
797 | else |
---|
798 | { |
---|
799 | if (j >= strat->sl) return h; |
---|
800 | j++; |
---|
801 | } |
---|
802 | } |
---|
803 | } |
---|
804 | #else |
---|
805 | static poly redNF (poly h,kStrategy strat, int &len) |
---|
806 | { |
---|
807 | len=0; |
---|
808 | if (h==NULL) return NULL; |
---|
809 | int j; |
---|
810 | |
---|
811 | len=pLength(h); |
---|
812 | if (0 > strat->sl) |
---|
813 | { |
---|
814 | return h; |
---|
815 | } |
---|
816 | LObject P(h); |
---|
817 | P.SetShortExpVector(); |
---|
818 | P.bucket = kBucketCreate(currRing); |
---|
819 | kBucketInit(P.bucket,P.p,len /*pLength(P.p)*/); |
---|
820 | //int max_pos=simple_posInS(strat,P.p); |
---|
821 | loop |
---|
822 | { |
---|
823 | j=kFindDivisibleByInS(strat->S,strat->sevS,strat->sl,&P); |
---|
824 | if (j>=0) |
---|
825 | { |
---|
826 | nNormalize(pGetCoeff(P.p)); |
---|
827 | #ifdef KDEBUG |
---|
828 | if (TEST_OPT_DEBUG) |
---|
829 | { |
---|
830 | PrintS("red:"); |
---|
831 | wrp(h); |
---|
832 | PrintS(" with "); |
---|
833 | wrp(strat->S[j]); |
---|
834 | } |
---|
835 | #endif |
---|
836 | number coef=kBucketPolyRed(P.bucket,strat->S[j], |
---|
837 | strat->lenS[j]/*pLength(strat->S[j])*/, |
---|
838 | strat->kNoether); |
---|
839 | nDelete(&coef); |
---|
840 | h = kBucketGetLm(P.bucket); |
---|
841 | if (h==NULL) return NULL; |
---|
842 | P.p=h; |
---|
843 | P.t_p=NULL; |
---|
844 | P.SetShortExpVector(); |
---|
845 | #ifdef KDEBUG |
---|
846 | if (TEST_OPT_DEBUG) |
---|
847 | { |
---|
848 | PrintS("\nto:"); |
---|
849 | wrp(h); |
---|
850 | PrintLn(); |
---|
851 | } |
---|
852 | #endif |
---|
853 | } |
---|
854 | else |
---|
855 | { |
---|
856 | kBucketClear(P.bucket,&(P.p),&len); |
---|
857 | kBucketDestroy(&P.bucket); |
---|
858 | pNormalize(P.p); |
---|
859 | return P.p; |
---|
860 | } |
---|
861 | } |
---|
862 | } |
---|
863 | #endif |
---|
864 | #ifdef REDTAIL_S |
---|
865 | poly redNFTail (poly h,const int sl,kStrategy strat, int len) |
---|
866 | { |
---|
867 | if (h==NULL) return NULL; |
---|
868 | if (pNext(h)==NULL) return h; |
---|
869 | pTest(h); |
---|
870 | if (0 > sl) |
---|
871 | return h; |
---|
872 | |
---|
873 | int j; |
---|
874 | poly res=h; |
---|
875 | poly act=res; |
---|
876 | LObject P(pNext(h)); |
---|
877 | pNext(res)=NULL; |
---|
878 | P.bucket = kBucketCreate(currRing); |
---|
879 | len--; |
---|
880 | h=P.p; |
---|
881 | if (len <=0) len=pLength(h); |
---|
882 | kBucketInit(P.bucket,h /*P.p*/,len /*pLength(P.p)*/); |
---|
883 | pTest(h); |
---|
884 | loop |
---|
885 | { |
---|
886 | P.p=h; |
---|
887 | P.t_p=NULL; |
---|
888 | P.SetShortExpVector(); |
---|
889 | loop |
---|
890 | { |
---|
891 | j=kFindDivisibleByInS(strat->S,strat->sevS,sl,&P); |
---|
892 | if (j>=0) |
---|
893 | { |
---|
894 | #ifdef REDTAIL_PROT |
---|
895 | PrintS("r"); |
---|
896 | #endif |
---|
897 | nNormalize(pGetCoeff(P.p)); |
---|
898 | #ifdef KDEBUG |
---|
899 | if (TEST_OPT_DEBUG) |
---|
900 | { |
---|
901 | PrintS("red tail:"); |
---|
902 | wrp(h); |
---|
903 | PrintS(" with "); |
---|
904 | wrp(strat->S[j]); |
---|
905 | } |
---|
906 | #endif |
---|
907 | number coef; |
---|
908 | pTest(strat->S[j]); |
---|
909 | coef=kBucketPolyRed(P.bucket,strat->S[j], |
---|
910 | strat->lenS[j]/*pLength(strat->S[j])*/,strat->kNoether); |
---|
911 | pMult_nn(res,coef); |
---|
912 | nDelete(&coef); |
---|
913 | h = kBucketGetLm(P.bucket); |
---|
914 | pTest(h); |
---|
915 | if (h==NULL) |
---|
916 | { |
---|
917 | #ifdef REDTAIL_PROT |
---|
918 | PrintS(" "); |
---|
919 | #endif |
---|
920 | return res; |
---|
921 | } |
---|
922 | pTest(h); |
---|
923 | P.p=h; |
---|
924 | P.t_p=NULL; |
---|
925 | P.SetShortExpVector(); |
---|
926 | #ifdef KDEBUG |
---|
927 | if (TEST_OPT_DEBUG) |
---|
928 | { |
---|
929 | PrintS("\nto tail:"); |
---|
930 | wrp(h); |
---|
931 | PrintLn(); |
---|
932 | } |
---|
933 | #endif |
---|
934 | } |
---|
935 | else |
---|
936 | { |
---|
937 | #ifdef REDTAIL_PROT |
---|
938 | PrintS("n"); |
---|
939 | #endif |
---|
940 | break; |
---|
941 | } |
---|
942 | } /* end loop current mon */ |
---|
943 | poly tmp=pHead(h /*kBucketGetLm(P.bucket)*/); |
---|
944 | act->next=tmp;pIter(act); |
---|
945 | poly tmp2=pHead(h); |
---|
946 | pNeg(tmp2); |
---|
947 | int ltmp2=1; |
---|
948 | pTest(tmp2); |
---|
949 | kBucket_Add_q(P.bucket, tmp2, <mp2); |
---|
950 | |
---|
951 | h = kBucketGetLm(P.bucket); |
---|
952 | if (h==NULL) |
---|
953 | { |
---|
954 | #ifdef REDTAIL_PROT |
---|
955 | PrintS(" "); |
---|
956 | #endif |
---|
957 | return res; |
---|
958 | } |
---|
959 | pTest(h); |
---|
960 | } |
---|
961 | } |
---|
962 | #endif |
---|
963 | |
---|
964 | void do_this_spoly_stuff(int i,int j,calc_dat* c){ |
---|
965 | poly f=c->S->m[i]; |
---|
966 | poly g=c->S->m[j]; |
---|
967 | poly h=ksOldCreateSpoly(f, g, NULL, c->r); |
---|
968 | poly hr=NULL; |
---|
969 | #ifdef FULLREDUCTIONS |
---|
970 | if (h!=NULL) |
---|
971 | { |
---|
972 | int len; |
---|
973 | hr=redNF(h,c->strat,len); |
---|
974 | if (hr!=NULL) |
---|
975 | #ifdef REDTAIL_S |
---|
976 | hr = redNFTail(hr,c->strat->sl,c->strat,len); |
---|
977 | #else |
---|
978 | hr = redtailBba(hr,c->strat->sl,c->strat); |
---|
979 | #endif |
---|
980 | } |
---|
981 | #else |
---|
982 | if (h!=NULL) |
---|
983 | { |
---|
984 | int len; |
---|
985 | hr=redNF(h,c->strat,&len); |
---|
986 | } |
---|
987 | #endif |
---|
988 | c->normal_forms++; |
---|
989 | if (hr==NULL) |
---|
990 | { |
---|
991 | PrintS("-"); |
---|
992 | c->misses_counter++; |
---|
993 | c->misses[i]++; |
---|
994 | c->misses[j]++; |
---|
995 | c->misses_series++; |
---|
996 | } |
---|
997 | else |
---|
998 | { |
---|
999 | c->misses_series=0; |
---|
1000 | #ifdef HEAD_BIN |
---|
1001 | hr=p_MoveHead(hr,c->HeadBin); |
---|
1002 | #endif |
---|
1003 | add_to_basis(hr, i,j,c); |
---|
1004 | } |
---|
1005 | } |
---|
1006 | |
---|
1007 | ideal t_rep_gb(ring r,ideal arg_I){ |
---|
1008 | ideal I_temp=kInterRed(arg_I); |
---|
1009 | ideal I=idCompactify(I_temp); |
---|
1010 | idDelete(&I_temp); |
---|
1011 | calc_dat* c=(calc_dat*) omalloc(sizeof(calc_dat)); |
---|
1012 | c->r=currRing; |
---|
1013 | c->S=I; |
---|
1014 | initial_data(c); |
---|
1015 | while (find_next_pair(c)){ |
---|
1016 | int i,j; |
---|
1017 | int z; |
---|
1018 | i=c->found_i; |
---|
1019 | j=c->found_j; |
---|
1020 | replace_pair(i,j,c); |
---|
1021 | if (!(c->states[max(i,j)][min(i,j)]==HASTREP)){ |
---|
1022 | do_this_spoly_stuff(i,j,c); |
---|
1023 | } |
---|
1024 | //else |
---|
1025 | // PrintS("f"); |
---|
1026 | |
---|
1027 | now_t_rep(i,j,c); |
---|
1028 | now_t_rep(c->found_i,c->found_j,c); |
---|
1029 | #ifdef RANDOM_WALK |
---|
1030 | c->continue_i=my_rand(c->n-1)+1; |
---|
1031 | c->continue_j=my_rand(c->continue_i); |
---|
1032 | #endif |
---|
1033 | int_pair_node* h=c->soon_free; |
---|
1034 | while(h!=NULL) |
---|
1035 | { |
---|
1036 | int_pair_node* s=h; |
---|
1037 | now_t_rep(h->a,h->b,c); |
---|
1038 | |
---|
1039 | h=h->next; |
---|
1040 | omfree(s); |
---|
1041 | } |
---|
1042 | |
---|
1043 | |
---|
1044 | } |
---|
1045 | omfree(c->rep); |
---|
1046 | for(int z=0;z<c->n;z++){ |
---|
1047 | omfree(c->states[z]); |
---|
1048 | } |
---|
1049 | omfree(c->states); |
---|
1050 | omfree(c->lengths); |
---|
1051 | printf("calculated %d NFs\n",c->normal_forms); |
---|
1052 | omfree(c); |
---|
1053 | return(I); |
---|
1054 | } |
---|
1055 | void now_t_rep(int arg_i, int arg_j, calc_dat* c){ |
---|
1056 | int i,j; |
---|
1057 | if (arg_i==arg_j){ |
---|
1058 | return; |
---|
1059 | } |
---|
1060 | if (arg_i>arg_j){ |
---|
1061 | i=arg_j; |
---|
1062 | j=arg_i; |
---|
1063 | } else { |
---|
1064 | i=arg_i; |
---|
1065 | j=arg_j; |
---|
1066 | } |
---|
1067 | c->states[j][i]=HASTREP; |
---|
1068 | } |
---|
1069 | bool has_t_rep(const int & arg_i, const int & arg_j, calc_dat* state){ |
---|
1070 | |
---|
1071 | if (arg_i==arg_j) |
---|
1072 | { |
---|
1073 | return (true); |
---|
1074 | } |
---|
1075 | if (arg_i>arg_j) |
---|
1076 | { |
---|
1077 | return (state->states[arg_i][arg_j]==HASTREP); |
---|
1078 | } else |
---|
1079 | { |
---|
1080 | return (state->states[arg_j][arg_i]==HASTREP); |
---|
1081 | } |
---|
1082 | } |
---|
1083 | int pLcmDeg(poly a, poly b) |
---|
1084 | { |
---|
1085 | int i; |
---|
1086 | int n=0; |
---|
1087 | for (i=pVariables; i; i--) |
---|
1088 | { |
---|
1089 | n+=max( pGetExp(a,i), pGetExp(b,i)); |
---|
1090 | } |
---|
1091 | return n; |
---|
1092 | |
---|
1093 | } |
---|
1094 | int pMinDeg3(poly f){ |
---|
1095 | if (f==NULL){ |
---|
1096 | return(-1); |
---|
1097 | |
---|
1098 | } |
---|
1099 | |
---|
1100 | poly h=f->next; |
---|
1101 | int n=pFDeg(h); |
---|
1102 | int i=0; |
---|
1103 | while((i<2)){ |
---|
1104 | if (h==NULL) |
---|
1105 | return(n); |
---|
1106 | h=h->next; |
---|
1107 | if (h!=NULL){ |
---|
1108 | n=min(n,pFDeg(h)); |
---|
1109 | } |
---|
1110 | i++; |
---|
1111 | } |
---|
1112 | |
---|
1113 | return n; |
---|
1114 | } |
---|
1115 | |
---|
1116 | |
---|
1117 | void shorten_tails(calc_dat* c, poly monom) |
---|
1118 | { |
---|
1119 | |
---|
1120 | for(int i=0;i<c->n;i++) |
---|
1121 | { |
---|
1122 | //enter tail |
---|
1123 | if (c->rep[i]!=i) continue; |
---|
1124 | if (c->S->m[i]==NULL) continue; |
---|
1125 | poly tail=c->S->m[i]->next; |
---|
1126 | poly prev=c->S->m[i]; |
---|
1127 | bool did_something=false; |
---|
1128 | while((tail!=NULL)&& (pLmCmp(tail, monom)>=0)) |
---|
1129 | { |
---|
1130 | if (p_LmDivisibleBy(monom,tail,c->r)) |
---|
1131 | { |
---|
1132 | did_something=true; |
---|
1133 | prev->next=tail->next; |
---|
1134 | tail->next=NULL; |
---|
1135 | p_Delete(& tail,c->r); |
---|
1136 | tail=prev; |
---|
1137 | //PrintS("Shortened"); |
---|
1138 | c->lengths[i]--; |
---|
1139 | } |
---|
1140 | prev=tail; |
---|
1141 | tail=tail->next; |
---|
1142 | } |
---|
1143 | if (did_something) |
---|
1144 | { |
---|
1145 | int new_pos=simple_posInS(c->strat,c->S->m[i],c->lengths[i]); |
---|
1146 | int old_pos=-1; |
---|
1147 | //assume new_pos<old_pos |
---|
1148 | for (int z=new_pos;z<=c->strat->sl;z++) |
---|
1149 | { |
---|
1150 | if (c->strat->S[z]==c->S->m[i]) |
---|
1151 | { |
---|
1152 | old_pos=z; |
---|
1153 | break; |
---|
1154 | } |
---|
1155 | } |
---|
1156 | if (old_pos== -1) |
---|
1157 | for (int z=new_pos-1;z>=0l;z--) |
---|
1158 | { |
---|
1159 | if (c->strat->S[z]==c->S->m[i]) |
---|
1160 | { |
---|
1161 | old_pos=z; |
---|
1162 | break; |
---|
1163 | } |
---|
1164 | } |
---|
1165 | assume(old_pos>=0); |
---|
1166 | assume(pLength(c->strat->S[old_pos])==c->lengths[i]); |
---|
1167 | c->strat->lenS[old_pos]=c->lengths[i]; |
---|
1168 | if (new_pos<old_pos) |
---|
1169 | move_forward_in_S(old_pos,new_pos,c->strat); |
---|
1170 | if (c->lengths[i]==1) |
---|
1171 | { |
---|
1172 | int j; |
---|
1173 | for ( j=0;j<i;j++) |
---|
1174 | { |
---|
1175 | if (c->lengths[j]==1) |
---|
1176 | c->states[i][j]=HASTREP; |
---|
1177 | } |
---|
1178 | for ( j=i+1;j<c->n;j++){ |
---|
1179 | if (c->lengths[j]==1) |
---|
1180 | c->states[j][i]=HASTREP; |
---|
1181 | } |
---|
1182 | } |
---|
1183 | } |
---|
1184 | } |
---|
1185 | } |
---|