[35aab3] | 1 | /**************************************** |
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| 2 | * Computer Algebra System SINGULAR * |
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| 3 | ****************************************/ |
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[341696] | 4 | /* $Id$ */ |
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[35aab3] | 5 | /* |
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| 6 | * ABSTRACT - Kernel: alg. of Buchberger |
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| 7 | */ |
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| 8 | |
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| 9 | // #define PDEBUG 2 |
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[645a19] | 10 | |
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| 11 | // TODO: why the following is here instead of mod2.h??? |
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| 12 | |
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[35aab3] | 13 | // define to enable tailRings |
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[60eb1d] | 14 | #define HAVE_TAIL_RING |
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[645a19] | 15 | |
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[599326] | 16 | #include <kernel/mod2.h> |
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[645a19] | 17 | |
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| 18 | #ifndef NDEBUG |
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| 19 | # define MYTEST 0 |
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| 20 | #else /* ifndef NDEBUG */ |
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| 21 | # define MYTEST 0 |
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| 22 | #endif /* ifndef NDEBUG */ |
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| 23 | |
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[8d679fd] | 24 | #if MYTEST |
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[645a19] | 25 | # ifdef HAVE_TAIL_RING |
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| 26 | # undef HAVE_TAIL_RING |
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| 27 | # endif // ifdef HAVE_TAIL_RING |
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| 28 | #endif |
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| 29 | |
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[35aab3] | 30 | // define if no buckets should be used |
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| 31 | // #define NO_BUCKETS |
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| 32 | |
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[cbc616] | 33 | #ifdef HAVE_PLURAL |
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| 34 | #define PLURAL_INTERNAL_DECLARATIONS 1 |
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| 35 | #endif |
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[599326] | 36 | #include <kernel/kutil.h> |
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| 37 | #include <kernel/options.h> |
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[b1dfaf] | 38 | #include <omalloc/omalloc.h> |
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[599326] | 39 | #include <kernel/polys.h> |
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| 40 | #include <kernel/ideals.h> |
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| 41 | #include <kernel/febase.h> |
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| 42 | #include <kernel/kstd1.h> |
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| 43 | #include <kernel/khstd.h> |
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| 44 | #include <kernel/kbuckets.h> |
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[35aab3] | 45 | //#include "cntrlc.h" |
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[599326] | 46 | #include <kernel/weight.h> |
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| 47 | #include <kernel/intvec.h> |
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[35aab3] | 48 | #ifdef HAVE_PLURAL |
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[599326] | 49 | #include <kernel/gring.h> |
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[35aab3] | 50 | #endif |
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| 51 | // #include "timer.h" |
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| 52 | |
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[cb0fbe] | 53 | /* shiftgb stuff */ |
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[599326] | 54 | #include <kernel/shiftgb.h> |
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[cb0fbe] | 55 | |
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[57fad3a] | 56 | int (*test_PosInT)(const TSet T,const int tl,LObject &h); |
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| 57 | int (*test_PosInL)(const LSet set, const int length, |
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| 58 | LObject* L,const kStrategy strat); |
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| 59 | |
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[35aab3] | 60 | // return -1 if no divisor is found |
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| 61 | // number of first divisor, otherwise |
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| 62 | int kFindDivisibleByInT(const TSet &T, const unsigned long* sevT, |
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| 63 | const int tl, const LObject* L, const int start) |
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| 64 | { |
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| 65 | unsigned long not_sev = ~L->sev; |
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| 66 | int j = start; |
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[dd2855] | 67 | poly p=L->p; |
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| 68 | ring r=currRing; |
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| 69 | if (p==NULL) { r=L->tailRing; p=L->t_p; } |
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[35aab3] | 70 | L->GetLm(p, r); |
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| 71 | |
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| 72 | pAssume(~not_sev == p_GetShortExpVector(p, r)); |
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| 73 | |
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| 74 | if (r == currRing) |
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| 75 | { |
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| 76 | loop |
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| 77 | { |
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| 78 | if (j > tl) return -1; |
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| 79 | #if defined(PDEBUG) || defined(PDIV_DEBUG) |
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| 80 | if (p_LmShortDivisibleBy(T[j].p, sevT[j], |
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| 81 | p, not_sev, r)) |
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| 82 | return j; |
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| 83 | #else |
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| 84 | if (!(sevT[j] & not_sev) && |
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| 85 | p_LmDivisibleBy(T[j].p, p, r)) |
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| 86 | return j; |
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| 87 | #endif |
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| 88 | j++; |
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| 89 | } |
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| 90 | } |
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| 91 | else |
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| 92 | { |
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| 93 | loop |
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| 94 | { |
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| 95 | if (j > tl) return -1; |
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| 96 | #if defined(PDEBUG) || defined(PDIV_DEBUG) |
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| 97 | if (p_LmShortDivisibleBy(T[j].t_p, sevT[j], |
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| 98 | p, not_sev, r)) |
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| 99 | return j; |
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| 100 | #else |
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| 101 | if (!(sevT[j] & not_sev) && |
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| 102 | p_LmDivisibleBy(T[j].t_p, p, r)) |
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| 103 | return j; |
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| 104 | #endif |
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| 105 | j++; |
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| 106 | } |
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| 107 | } |
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| 108 | } |
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| 109 | |
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| 110 | // same as above, only with set S |
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[391323] | 111 | int kFindDivisibleByInS(const kStrategy strat, int* max_ind, LObject* L) |
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[35aab3] | 112 | { |
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| 113 | unsigned long not_sev = ~L->sev; |
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| 114 | poly p = L->GetLmCurrRing(); |
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| 115 | int j = 0; |
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| 116 | |
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| 117 | pAssume(~not_sev == p_GetShortExpVector(p, currRing)); |
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[dd60f3c] | 118 | #if 1 |
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| 119 | int ende; |
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[24ed65] | 120 | if ((strat->ak>0) || pLexOrder) ende=strat->sl; |
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[dd60f3c] | 121 | else ende=posInS(strat,*max_ind,p,0)+1; |
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[f41bd9] | 122 | if (ende>(*max_ind)) ende=(*max_ind); |
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| 123 | #else |
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[e690a91] | 124 | int ende=strat->sl; |
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[b2c236] | 125 | #endif |
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[391323] | 126 | (*max_ind)=ende; |
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[35aab3] | 127 | loop |
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| 128 | { |
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[efb860] | 129 | if (j > ende) return -1; |
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[35aab3] | 130 | #if defined(PDEBUG) || defined(PDIV_DEBUG) |
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[efb860] | 131 | if (p_LmShortDivisibleBy(strat->S[j], strat->sevS[j], |
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[35aab3] | 132 | p, not_sev, currRing)) |
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| 133 | return j; |
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| 134 | #else |
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[efb860] | 135 | if ( !(strat->sevS[j] & not_sev) && |
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| 136 | p_LmDivisibleBy(strat->S[j], p, currRing)) |
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[35aab3] | 137 | return j; |
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| 138 | #endif |
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| 139 | j++; |
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| 140 | } |
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| 141 | } |
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| 142 | |
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[7ba059] | 143 | int kFindNextDivisibleByInS(const kStrategy strat, int start,int max_ind, LObject* L) |
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| 144 | { |
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| 145 | unsigned long not_sev = ~L->sev; |
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| 146 | poly p = L->GetLmCurrRing(); |
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| 147 | int j = start; |
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| 148 | |
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| 149 | pAssume(~not_sev == p_GetShortExpVector(p, currRing)); |
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| 150 | #if 1 |
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| 151 | int ende=max_ind; |
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| 152 | #else |
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| 153 | int ende=strat->sl; |
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| 154 | #endif |
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| 155 | loop |
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| 156 | { |
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| 157 | if (j > ende) return -1; |
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| 158 | #if defined(PDEBUG) || defined(PDIV_DEBUG) |
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| 159 | if (p_LmShortDivisibleBy(strat->S[j], strat->sevS[j], |
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| 160 | p, not_sev, currRing)) |
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| 161 | return j; |
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| 162 | #else |
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| 163 | if ( !(strat->sevS[j] & not_sev) && |
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| 164 | p_LmDivisibleBy(strat->S[j], p, currRing)) |
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| 165 | return j; |
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| 166 | #endif |
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| 167 | j++; |
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| 168 | } |
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| 169 | } |
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| 170 | |
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[c90b43] | 171 | #ifdef HAVE_RINGS |
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[a09a42] | 172 | poly kFindZeroPoly(poly input_p, ring leadRing, ring tailRing) |
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| 173 | { |
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[cea6f3] | 174 | // m = currRing->ch |
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| 175 | |
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[a6889e] | 176 | if (input_p == NULL) return NULL; |
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| 177 | |
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| 178 | poly p = input_p; |
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[cea6f3] | 179 | poly zeroPoly = NULL; |
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[994445] | 180 | NATNUMBER a = (NATNUMBER) pGetCoeff(p); |
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[cea6f3] | 181 | |
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[fe7f527] | 182 | int k_ind2 = 0; |
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| 183 | int a_ind2 = ind2(a); |
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[cea6f3] | 184 | |
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[994445] | 185 | NATNUMBER k = 1; |
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[6d09f28] | 186 | // of interest is only k_ind2, special routine for improvement ... TODO OLIVER |
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[fe7f527] | 187 | for (int i = 1; i <= leadRing->N; i++) |
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[a09a42] | 188 | { |
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[fe7f527] | 189 | k_ind2 = k_ind2 + ind_fact_2(p_GetExp(p, i, leadRing)); |
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[cea6f3] | 190 | } |
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[fe7f527] | 191 | |
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[994445] | 192 | a = (NATNUMBER) pGetCoeff(p); |
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[cea6f3] | 193 | |
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| 194 | number tmp1; |
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| 195 | poly tmp2, tmp3; |
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[fe7f527] | 196 | poly lead_mult = p_ISet(1, tailRing); |
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[a09a42] | 197 | if (leadRing->ch <= k_ind2 + a_ind2) |
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| 198 | { |
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[fe7f527] | 199 | int too_much = k_ind2 + a_ind2 - leadRing->ch; |
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| 200 | int s_exp; |
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[a6889e] | 201 | zeroPoly = p_ISet(a, tailRing); |
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[a09a42] | 202 | for (int i = 1; i <= leadRing->N; i++) |
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| 203 | { |
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[fe7f527] | 204 | s_exp = p_GetExp(p, i,leadRing); |
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[388f91e] | 205 | if (s_exp % 2 != 0) |
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[fe7f527] | 206 | { |
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| 207 | s_exp = s_exp - 1; |
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| 208 | } |
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| 209 | while ( (0 < ind2(s_exp)) && (ind2(s_exp) <= too_much) ) |
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| 210 | { |
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| 211 | too_much = too_much - ind2(s_exp); |
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| 212 | s_exp = s_exp - 2; |
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| 213 | } |
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[388f91e] | 214 | p_SetExp(lead_mult, i, p_GetExp(p, i,leadRing) - s_exp, tailRing); |
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[994445] | 215 | for (NATNUMBER j = 1; j <= s_exp; j++) |
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[a09a42] | 216 | { |
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[cea6f3] | 217 | tmp1 = nInit(j); |
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[a6889e] | 218 | tmp2 = p_ISet(1, tailRing); |
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| 219 | p_SetExp(tmp2, i, 1, tailRing); |
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| 220 | p_Setm(tmp2, tailRing); |
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[a09a42] | 221 | if (nIsZero(tmp1)) |
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[fe7f527] | 222 | { // should nowbe obsolet, test ! TODO OLIVER |
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[a6889e] | 223 | zeroPoly = p_Mult_q(zeroPoly, tmp2, tailRing); |
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[cea6f3] | 224 | } |
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[a09a42] | 225 | else |
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| 226 | { |
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[f92547] | 227 | tmp3 = p_NSet(nCopy(tmp1), tailRing); |
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[fe7f527] | 228 | zeroPoly = p_Mult_q(zeroPoly, p_Add_q(tmp3, tmp2, tailRing), tailRing); |
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[cea6f3] | 229 | } |
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| 230 | } |
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| 231 | } |
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[fe7f527] | 232 | p_Setm(lead_mult, tailRing); |
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[388f91e] | 233 | zeroPoly = p_Mult_mm(zeroPoly, lead_mult, tailRing); |
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[f92547] | 234 | tmp2 = p_NSet(nCopy(pGetCoeff(zeroPoly)), leadRing); |
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[977f94] | 235 | for (int i = 1; i <= leadRing->N; i++) |
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| 236 | { |
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[a725dae] | 237 | pSetExp(tmp2, i, p_GetExp(zeroPoly, i, tailRing)); |
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[cea6f3] | 238 | } |
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[7f06cca] | 239 | p_Setm(tmp2, leadRing); |
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| 240 | zeroPoly = p_LmDeleteAndNext(zeroPoly, tailRing); |
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[cea6f3] | 241 | pNext(tmp2) = zeroPoly; |
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| 242 | return tmp2; |
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| 243 | } |
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[994445] | 244 | /* NATNUMBER alpha_k = twoPow(leadRing->ch - k_ind2); |
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[977f94] | 245 | if (1 == 0 && alpha_k <= a) |
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| 246 | { // Temporarly disabled, reducing coefficients not compatible with std TODO Oliver |
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[7f06cca] | 247 | zeroPoly = p_ISet((a / alpha_k)*alpha_k, tailRing); |
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[977f94] | 248 | for (int i = 1; i <= leadRing->N; i++) |
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| 249 | { |
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[994445] | 250 | for (NATNUMBER j = 1; j <= p_GetExp(p, i, leadRing); j++) |
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[977f94] | 251 | { |
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[7f06cca] | 252 | tmp1 = nInit(j); |
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| 253 | tmp2 = p_ISet(1, tailRing); |
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| 254 | p_SetExp(tmp2, i, 1, tailRing); |
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| 255 | p_Setm(tmp2, tailRing); |
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[977f94] | 256 | if (nIsZero(tmp1)) |
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| 257 | { |
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[7f06cca] | 258 | zeroPoly = p_Mult_q(zeroPoly, tmp2, tailRing); |
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| 259 | } |
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[977f94] | 260 | else |
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| 261 | { |
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[994445] | 262 | tmp3 = p_ISet((NATNUMBER) tmp1, tailRing); |
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[7f06cca] | 263 | zeroPoly = p_Mult_q(zeroPoly, p_Add_q(tmp2, tmp3, tailRing), tailRing); |
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| 264 | } |
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| 265 | } |
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| 266 | } |
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[994445] | 267 | tmp2 = p_ISet((NATNUMBER) pGetCoeff(zeroPoly), leadRing); |
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[977f94] | 268 | for (int i = 1; i <= leadRing->N; i++) |
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| 269 | { |
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[a725dae] | 270 | pSetExp(tmp2, i, p_GetExp(zeroPoly, i, tailRing)); |
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[7f06cca] | 271 | } |
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| 272 | p_Setm(tmp2, leadRing); |
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| 273 | zeroPoly = p_LmDeleteAndNext(zeroPoly, tailRing); |
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| 274 | pNext(tmp2) = zeroPoly; |
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| 275 | return tmp2; |
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[6d09f28] | 276 | } */ |
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[cea6f3] | 277 | return NULL; |
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| 278 | } |
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[206e158] | 279 | #endif |
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[a6889e] | 280 | |
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[206e158] | 281 | |
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| 282 | #ifdef HAVE_RINGS |
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[585bbcb] | 283 | /*2 |
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| 284 | * reduction procedure for the ring Z/2^m |
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| 285 | */ |
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[093f30e] | 286 | int redRing (LObject* h,kStrategy strat) |
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[585bbcb] | 287 | { |
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[8d679fd] | 288 | if (h->IsNull()) return 0; // spoly is zero (can only occure with zero divisors) |
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| 289 | if (strat->tl<0) return 1; |
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[cea6f3] | 290 | |
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[d5564f8] | 291 | int at,i; |
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| 292 | long d; |
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[585bbcb] | 293 | int j = 0; |
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| 294 | int pass = 0; |
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[e342a2] | 295 | poly zeroPoly = NULL; |
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[cea6f3] | 296 | |
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[388f91e] | 297 | // TODO warum SetpFDeg notwendig? |
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[cea6f3] | 298 | h->SetpFDeg(); |
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| 299 | assume(h->pFDeg() == h->FDeg); |
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[388f91e] | 300 | long reddeg = h->GetpFDeg(); |
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[585bbcb] | 301 | |
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[fe7f527] | 302 | h->SetShortExpVector(); |
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[585bbcb] | 303 | loop |
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| 304 | { |
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[8d679fd] | 305 | j = kFindDivisibleByInT(strat->T, strat->sevT, strat->tl, h); |
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| 306 | if (j < 0) return 1; |
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[585bbcb] | 307 | |
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[94ebce] | 308 | ksReducePoly(h, &(strat->T[j]), NULL, NULL, strat); // with debug output |
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[585bbcb] | 309 | |
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| 310 | if (h->GetLmTailRing() == NULL) |
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| 311 | { |
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[a539ad] | 312 | if (h->lcm!=NULL) pLmDelete(h->lcm); |
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[585bbcb] | 313 | #ifdef KDEBUG |
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| 314 | h->lcm=NULL; |
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| 315 | #endif |
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[8d679fd] | 316 | h->Clear(); |
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[585bbcb] | 317 | return 0; |
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| 318 | } |
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| 319 | h->SetShortExpVector(); |
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| 320 | d = h->SetpFDeg(); |
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| 321 | /*- try to reduce the s-polynomial -*/ |
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| 322 | pass++; |
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[228b631] | 323 | if (!TEST_OPT_REDTHROUGH && |
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[585bbcb] | 324 | (strat->Ll >= 0) && ((d > reddeg) || (pass > strat->LazyPass))) |
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| 325 | { |
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| 326 | h->SetLmCurrRing(); |
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[8d679fd] | 327 | if (strat->posInLDependsOnLength) |
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| 328 | h->SetLength(strat->length_pLength); |
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[585bbcb] | 329 | at = strat->posInL(strat->L,strat->Ll,h,strat); |
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| 330 | if (at <= strat->Ll) |
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| 331 | { |
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| 332 | #ifdef KDEBUG |
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| 333 | if (TEST_OPT_DEBUG) Print(" ->L[%d]\n",at); |
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| 334 | #endif |
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[cea6f3] | 335 | enterL(&strat->L,&strat->Ll,&strat->Lmax,*h,at); // NOT RING CHECKED OLIVER |
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[585bbcb] | 336 | h->Clear(); |
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| 337 | return -1; |
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| 338 | } |
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| 339 | } |
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[8d679fd] | 340 | if (d != reddeg) |
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[585bbcb] | 341 | { |
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[d5564f8] | 342 | if (d >= strat->tailRing->bitmask) |
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[f7feb7] | 343 | { |
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[8d679fd] | 344 | if (h->pTotalDeg() >= strat->tailRing->bitmask) |
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| 345 | { |
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| 346 | strat->overflow=TRUE; |
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[d5564f8] | 347 | //Print("OVERFLOW in redRing d=%ld, max=%ld\n",d,strat->tailRing->bitmask); |
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[8d679fd] | 348 | h->GetP(); |
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| 349 | at = strat->posInL(strat->L,strat->Ll,h,strat); |
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| 350 | enterL(&strat->L,&strat->Ll,&strat->Lmax,*h,at); |
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| 351 | h->Clear(); |
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[d5564f8] | 352 | return -1; |
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| 353 | } |
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[f7feb7] | 354 | } |
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| 355 | else if ((TEST_OPT_PROT) && (strat->Ll < 0)) |
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| 356 | { |
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[dd8a7d] | 357 | Print(".%ld",d);mflush(); |
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[f7feb7] | 358 | reddeg = d; |
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| 359 | } |
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[585bbcb] | 360 | } |
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| 361 | } |
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| 362 | } |
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| 363 | #endif |
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| 364 | |
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[35aab3] | 365 | /*2 |
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| 366 | * reduction procedure for the homogeneous case |
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| 367 | * and the case of a degree-ordering |
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| 368 | */ |
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| 369 | int redHomog (LObject* h,kStrategy strat) |
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| 370 | { |
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[bdde4f4] | 371 | if (strat->tl<0) return 1; |
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| 372 | //if (h->GetLmTailRing()==NULL) return 0; // HS: SHOULD NOT BE NEEDED! |
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| 373 | assume(h->FDeg == h->pFDeg()); |
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| 374 | |
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| 375 | poly h_p; |
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[225d94] | 376 | int i,j,at,pass, ii; |
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[bdde4f4] | 377 | unsigned long not_sev; |
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| 378 | long reddeg,d; |
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| 379 | |
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| 380 | pass = j = 0; |
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| 381 | d = reddeg = h->GetpFDeg(); |
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| 382 | h->SetShortExpVector(); |
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| 383 | int li; |
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| 384 | h_p = h->GetLmTailRing(); |
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| 385 | not_sev = ~ h->sev; |
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[35aab3] | 386 | loop |
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| 387 | { |
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| 388 | j = kFindDivisibleByInT(strat->T, strat->sevT, strat->tl, h); |
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[bdde4f4] | 389 | if (j < 0) return 1; |
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| 390 | |
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| 391 | li = strat->T[j].pLength; |
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| 392 | ii = j; |
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| 393 | /* |
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| 394 | * the polynomial to reduce with (up to the moment) is; |
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| 395 | * pi with length li |
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| 396 | */ |
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| 397 | i = j; |
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| 398 | #if 1 |
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[8c36a9] | 399 | if (TEST_OPT_LENGTH) |
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[bdde4f4] | 400 | loop |
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[35aab3] | 401 | { |
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[bdde4f4] | 402 | /*- search the shortest possible with respect to length -*/ |
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| 403 | i++; |
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| 404 | if (i > strat->tl) |
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| 405 | break; |
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| 406 | if (li<=1) |
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| 407 | break; |
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| 408 | if ((strat->T[i].pLength < li) |
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| 409 | && |
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| 410 | p_LmShortDivisibleBy(strat->T[i].GetLmTailRing(), strat->sevT[i], |
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| 411 | h_p, not_sev, strat->tailRing)) |
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| 412 | { |
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| 413 | /* |
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| 414 | * the polynomial to reduce with is now; |
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| 415 | */ |
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| 416 | li = strat->T[i].pLength; |
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| 417 | ii = i; |
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| 418 | } |
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[35aab3] | 419 | } |
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[bdde4f4] | 420 | #endif |
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[35aab3] | 421 | |
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[bdde4f4] | 422 | /* |
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| 423 | * end of search: have to reduce with pi |
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| 424 | */ |
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| 425 | #ifdef KDEBUG |
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| 426 | if (TEST_OPT_DEBUG) |
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| 427 | { |
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| 428 | PrintS("red:"); |
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| 429 | h->wrp(); |
---|
| 430 | PrintS(" with "); |
---|
| 431 | strat->T[ii].wrp(); |
---|
| 432 | } |
---|
| 433 | #endif |
---|
| 434 | assume(strat->fromT == FALSE); |
---|
| 435 | |
---|
| 436 | ksReducePoly(h, &(strat->T[ii]), NULL, NULL, strat); |
---|
[35aab3] | 437 | |
---|
| 438 | #ifdef KDEBUG |
---|
| 439 | if (TEST_OPT_DEBUG) |
---|
| 440 | { |
---|
[bdde4f4] | 441 | PrintS("\nto "); |
---|
[35aab3] | 442 | h->wrp(); |
---|
| 443 | PrintLn(); |
---|
| 444 | } |
---|
| 445 | #endif |
---|
[bdde4f4] | 446 | |
---|
| 447 | h_p = h->GetLmTailRing(); |
---|
| 448 | if (h_p == NULL) |
---|
[35aab3] | 449 | { |
---|
| 450 | if (h->lcm!=NULL) pLmFree(h->lcm); |
---|
| 451 | #ifdef KDEBUG |
---|
| 452 | h->lcm=NULL; |
---|
| 453 | #endif |
---|
| 454 | return 0; |
---|
| 455 | } |
---|
[bdde4f4] | 456 | h->SetShortExpVector(); |
---|
| 457 | not_sev = ~ h->sev; |
---|
| 458 | /* |
---|
| 459 | * try to reduce the s-polynomial h |
---|
| 460 | *test first whether h should go to the lazyset L |
---|
| 461 | *-if the degree jumps |
---|
| 462 | *-if the number of pre-defined reductions jumps |
---|
| 463 | */ |
---|
| 464 | pass++; |
---|
[228b631] | 465 | if (!TEST_OPT_REDTHROUGH && (strat->Ll >= 0) && (pass > strat->LazyPass)) |
---|
[0188fa] | 466 | { |
---|
| 467 | h->SetLmCurrRing(); |
---|
[bdde4f4] | 468 | at = strat->posInL(strat->L,strat->Ll,h,strat); |
---|
[0188fa] | 469 | if (at <= strat->Ll) |
---|
| 470 | { |
---|
[bdde4f4] | 471 | int dummy=strat->sl; |
---|
| 472 | if (kFindDivisibleByInS(strat, &dummy, h) < 0) |
---|
| 473 | return 1; |
---|
| 474 | enterL(&strat->L,&strat->Ll,&strat->Lmax,*h,at); |
---|
[0188fa] | 475 | #ifdef KDEBUG |
---|
[bdde4f4] | 476 | if (TEST_OPT_DEBUG) |
---|
| 477 | Print(" lazy: -> L%d\n",at); |
---|
[0188fa] | 478 | #endif |
---|
| 479 | h->Clear(); |
---|
| 480 | return -1; |
---|
| 481 | } |
---|
| 482 | } |
---|
[35aab3] | 483 | } |
---|
| 484 | } |
---|
| 485 | |
---|
| 486 | /*2 |
---|
| 487 | * reduction procedure for the inhomogeneous case |
---|
| 488 | * and not a degree-ordering |
---|
| 489 | */ |
---|
| 490 | int redLazy (LObject* h,kStrategy strat) |
---|
| 491 | { |
---|
| 492 | if (strat->tl<0) return 1; |
---|
[d5564f8] | 493 | int at,i,ii,li; |
---|
[35aab3] | 494 | int j = 0; |
---|
| 495 | int pass = 0; |
---|
| 496 | assume(h->pFDeg() == h->FDeg); |
---|
| 497 | long reddeg = h->GetpFDeg(); |
---|
[d5564f8] | 498 | long d; |
---|
[225d94] | 499 | unsigned long not_sev; |
---|
[35aab3] | 500 | |
---|
| 501 | h->SetShortExpVector(); |
---|
[225d94] | 502 | poly h_p = h->GetLmTailRing(); |
---|
| 503 | not_sev = ~ h->sev; |
---|
[35aab3] | 504 | loop |
---|
| 505 | { |
---|
| 506 | j = kFindDivisibleByInT(strat->T, strat->sevT, strat->tl, h); |
---|
| 507 | if (j < 0) return 1; |
---|
[533634] | 508 | |
---|
[225d94] | 509 | li = strat->T[j].pLength; |
---|
[f0b6c9] | 510 | #if 0 |
---|
| 511 | if (li==0) |
---|
| 512 | { |
---|
| 513 | li=strat->T[j].pLength=pLength(strat->T[j].p); |
---|
| 514 | } |
---|
| 515 | #endif |
---|
[225d94] | 516 | ii = j; |
---|
| 517 | /* |
---|
| 518 | * the polynomial to reduce with (up to the moment) is; |
---|
| 519 | * pi with length li |
---|
| 520 | */ |
---|
| 521 | |
---|
| 522 | i = j; |
---|
| 523 | #if 1 |
---|
[8c36a9] | 524 | if (TEST_OPT_LENGTH) |
---|
[225d94] | 525 | loop |
---|
| 526 | { |
---|
| 527 | /*- search the shortest possible with respect to length -*/ |
---|
| 528 | i++; |
---|
| 529 | if (i > strat->tl) |
---|
| 530 | break; |
---|
| 531 | if (li<=1) |
---|
| 532 | break; |
---|
[f0b6c9] | 533 | #if 0 |
---|
| 534 | if (strat->T[i].pLength==0) |
---|
| 535 | { |
---|
| 536 | PrintS("!"); |
---|
| 537 | strat->T[i].pLength=pLength(strat->T[i].p); |
---|
| 538 | } |
---|
| 539 | #endif |
---|
[225d94] | 540 | if ((strat->T[i].pLength < li) |
---|
| 541 | && |
---|
| 542 | p_LmShortDivisibleBy(strat->T[i].GetLmTailRing(), strat->sevT[i], |
---|
| 543 | h_p, not_sev, strat->tailRing)) |
---|
| 544 | { |
---|
| 545 | /* |
---|
| 546 | * the polynomial to reduce with is now; |
---|
| 547 | */ |
---|
[533634] | 548 | PrintS("+"); |
---|
[225d94] | 549 | li = strat->T[i].pLength; |
---|
| 550 | ii = i; |
---|
| 551 | } |
---|
| 552 | } |
---|
| 553 | #endif |
---|
| 554 | |
---|
| 555 | /* |
---|
| 556 | * end of search: have to reduce with pi |
---|
| 557 | */ |
---|
| 558 | |
---|
[35aab3] | 559 | |
---|
| 560 | #ifdef KDEBUG |
---|
| 561 | if (TEST_OPT_DEBUG) |
---|
| 562 | { |
---|
| 563 | PrintS("red:"); |
---|
| 564 | h->wrp(); |
---|
| 565 | PrintS(" with "); |
---|
[225d94] | 566 | strat->T[ii].wrp(); |
---|
[35aab3] | 567 | } |
---|
| 568 | #endif |
---|
| 569 | |
---|
[225d94] | 570 | ksReducePoly(h, &(strat->T[ii]), NULL, NULL, strat); |
---|
[35aab3] | 571 | |
---|
| 572 | #ifdef KDEBUG |
---|
| 573 | if (TEST_OPT_DEBUG) |
---|
| 574 | { |
---|
| 575 | PrintS("\nto "); |
---|
| 576 | h->wrp(); |
---|
| 577 | PrintLn(); |
---|
| 578 | } |
---|
| 579 | #endif |
---|
| 580 | |
---|
[225d94] | 581 | h_p=h->GetLmTailRing(); |
---|
| 582 | |
---|
| 583 | if (h_p == NULL) |
---|
[35aab3] | 584 | { |
---|
| 585 | if (h->lcm!=NULL) pLmFree(h->lcm); |
---|
| 586 | #ifdef KDEBUG |
---|
| 587 | h->lcm=NULL; |
---|
| 588 | #endif |
---|
| 589 | return 0; |
---|
| 590 | } |
---|
| 591 | h->SetShortExpVector(); |
---|
[225d94] | 592 | not_sev = ~ h->sev; |
---|
[35aab3] | 593 | d = h->SetpFDeg(); |
---|
| 594 | /*- try to reduce the s-polynomial -*/ |
---|
| 595 | pass++; |
---|
[228b631] | 596 | if (//!TEST_OPT_REDTHROUGH && |
---|
[35aab3] | 597 | (strat->Ll >= 0) && ((d > reddeg) || (pass > strat->LazyPass))) |
---|
| 598 | { |
---|
| 599 | h->SetLmCurrRing(); |
---|
[0188fa] | 600 | at = strat->posInL(strat->L,strat->Ll,h,strat); |
---|
[35aab3] | 601 | if (at <= strat->Ll) |
---|
| 602 | { |
---|
[e690a91] | 603 | #if 1 |
---|
| 604 | int dummy=strat->sl; |
---|
| 605 | if (kFindDivisibleByInS(strat, &dummy, h) < 0) |
---|
[35aab3] | 606 | return 1; |
---|
[0188fa] | 607 | #endif |
---|
[35aab3] | 608 | #ifdef KDEBUG |
---|
| 609 | if (TEST_OPT_DEBUG) Print(" ->L[%d]\n",at); |
---|
| 610 | #endif |
---|
| 611 | enterL(&strat->L,&strat->Ll,&strat->Lmax,*h,at); |
---|
| 612 | h->Clear(); |
---|
| 613 | return -1; |
---|
| 614 | } |
---|
| 615 | } |
---|
[f7feb7] | 616 | else if (d != reddeg) |
---|
[35aab3] | 617 | { |
---|
[f7feb7] | 618 | if (d>=strat->tailRing->bitmask) |
---|
| 619 | { |
---|
[8d679fd] | 620 | if (h->pTotalDeg() >= strat->tailRing->bitmask) |
---|
| 621 | { |
---|
| 622 | strat->overflow=TRUE; |
---|
[d5564f8] | 623 | //Print("OVERFLOW in redLazy d=%ld, max=%ld\n",d,strat->tailRing->bitmask); |
---|
[8d679fd] | 624 | h->GetP(); |
---|
| 625 | at = strat->posInL(strat->L,strat->Ll,h,strat); |
---|
| 626 | enterL(&strat->L,&strat->Ll,&strat->Lmax,*h,at); |
---|
| 627 | h->Clear(); |
---|
[d5564f8] | 628 | return -1; |
---|
| 629 | } |
---|
[f7feb7] | 630 | } |
---|
| 631 | else if ((TEST_OPT_PROT) && (strat->Ll < 0)) |
---|
| 632 | { |
---|
[dd8a7d] | 633 | Print(".%ld",d);mflush(); |
---|
[f7feb7] | 634 | reddeg = d; |
---|
| 635 | } |
---|
[35aab3] | 636 | } |
---|
| 637 | } |
---|
| 638 | } |
---|
| 639 | /*2 |
---|
| 640 | * reduction procedure for the sugar-strategy (honey) |
---|
| 641 | * reduces h with elements from T choosing first possible |
---|
| 642 | * element in T with respect to the given ecart |
---|
| 643 | */ |
---|
| 644 | int redHoney (LObject* h, kStrategy strat) |
---|
| 645 | { |
---|
| 646 | if (strat->tl<0) return 1; |
---|
[c5f67b5] | 647 | //if (h->GetLmTailRing()==NULL) return 0; // HS: SHOULD NOT BE NEEDED! |
---|
[35aab3] | 648 | assume(h->FDeg == h->pFDeg()); |
---|
| 649 | poly h_p; |
---|
| 650 | int i,j,at,pass,ei, ii, h_d; |
---|
| 651 | unsigned long not_sev; |
---|
| 652 | long reddeg,d; |
---|
| 653 | |
---|
| 654 | pass = j = 0; |
---|
| 655 | d = reddeg = h->GetpFDeg() + h->ecart; |
---|
| 656 | h->SetShortExpVector(); |
---|
[b2c236] | 657 | int li; |
---|
[35aab3] | 658 | h_p = h->GetLmTailRing(); |
---|
| 659 | not_sev = ~ h->sev; |
---|
[f53fdf] | 660 | |
---|
| 661 | h->PrepareRed(strat->use_buckets); |
---|
[35aab3] | 662 | loop |
---|
| 663 | { |
---|
[f53fdf] | 664 | j=kFindDivisibleByInT(strat->T, strat->sevT, strat->tl, h); |
---|
[35aab3] | 665 | if (j < 0) return 1; |
---|
| 666 | |
---|
| 667 | ei = strat->T[j].ecart; |
---|
[b2c236] | 668 | li = strat->T[j].pLength; |
---|
[35aab3] | 669 | ii = j; |
---|
| 670 | /* |
---|
| 671 | * the polynomial to reduce with (up to the moment) is; |
---|
| 672 | * pi with ecart ei |
---|
| 673 | */ |
---|
| 674 | i = j; |
---|
[8c36a9] | 675 | if (TEST_OPT_LENGTH) |
---|
[35aab3] | 676 | loop |
---|
| 677 | { |
---|
| 678 | /*- takes the first possible with respect to ecart -*/ |
---|
| 679 | i++; |
---|
| 680 | if (i > strat->tl) |
---|
| 681 | break; |
---|
[f0b6c9] | 682 | //if (ei < h->ecart) |
---|
| 683 | // break; |
---|
[bdde4f4] | 684 | if (li<=1) |
---|
[35aab3] | 685 | break; |
---|
[f0b6c9] | 686 | if ((((strat->T[i].ecart < ei) && (ei> h->ecart)) |
---|
[b2c236] | 687 | || ((strat->T[i].ecart <= h->ecart) && (strat->T[i].pLength < li))) |
---|
| 688 | && |
---|
[35aab3] | 689 | p_LmShortDivisibleBy(strat->T[i].GetLmTailRing(), strat->sevT[i], |
---|
| 690 | h_p, not_sev, strat->tailRing)) |
---|
| 691 | { |
---|
| 692 | /* |
---|
| 693 | * the polynomial to reduce with is now; |
---|
| 694 | */ |
---|
| 695 | ei = strat->T[i].ecart; |
---|
[b2c236] | 696 | li = strat->T[i].pLength; |
---|
[35aab3] | 697 | ii = i; |
---|
| 698 | } |
---|
| 699 | } |
---|
| 700 | |
---|
| 701 | /* |
---|
| 702 | * end of search: have to reduce with pi |
---|
| 703 | */ |
---|
[228b631] | 704 | if (!TEST_OPT_REDTHROUGH && (pass!=0) && (ei > h->ecart)) |
---|
[35aab3] | 705 | { |
---|
[f53fdf] | 706 | h->GetTP(); // clears bucket |
---|
[35aab3] | 707 | h->SetLmCurrRing(); |
---|
| 708 | /* |
---|
| 709 | * It is not possible to reduce h with smaller ecart; |
---|
| 710 | * if possible h goes to the lazy-set L,i.e |
---|
| 711 | * if its position in L would be not the last one |
---|
| 712 | */ |
---|
| 713 | if (strat->Ll >= 0) /* L is not empty */ |
---|
| 714 | { |
---|
| 715 | at = strat->posInL(strat->L,strat->Ll,h,strat); |
---|
| 716 | if(at <= strat->Ll) |
---|
| 717 | /*- h will not become the next element to reduce -*/ |
---|
| 718 | { |
---|
| 719 | enterL(&strat->L,&strat->Ll,&strat->Lmax,*h,at); |
---|
| 720 | #ifdef KDEBUG |
---|
| 721 | if (TEST_OPT_DEBUG) Print(" ecart too big: -> L%d\n",at); |
---|
| 722 | #endif |
---|
| 723 | h->Clear(); |
---|
| 724 | return -1; |
---|
| 725 | } |
---|
| 726 | } |
---|
| 727 | } |
---|
| 728 | #ifdef KDEBUG |
---|
| 729 | if (TEST_OPT_DEBUG) |
---|
| 730 | { |
---|
| 731 | PrintS("red:"); |
---|
| 732 | h->wrp(); |
---|
| 733 | PrintS(" with "); |
---|
| 734 | strat->T[ii].wrp(); |
---|
| 735 | } |
---|
| 736 | #endif |
---|
| 737 | assume(strat->fromT == FALSE); |
---|
| 738 | |
---|
[f53fdf] | 739 | number coef; |
---|
| 740 | ksReducePoly(h,&(strat->T[ii]),strat->kNoetherTail(),&coef,strat); |
---|
[35aab3] | 741 | #ifdef KDEBUG |
---|
| 742 | if (TEST_OPT_DEBUG) |
---|
| 743 | { |
---|
[f53fdf] | 744 | PrintS("\nto:"); |
---|
[35aab3] | 745 | h->wrp(); |
---|
| 746 | PrintLn(); |
---|
| 747 | } |
---|
| 748 | #endif |
---|
[f53fdf] | 749 | if(h->IsNull()) |
---|
[35aab3] | 750 | { |
---|
[f53fdf] | 751 | h->Clear(); |
---|
[35aab3] | 752 | if (h->lcm!=NULL) pLmFree(h->lcm); |
---|
[f53fdf] | 753 | #ifdef KDEBUG |
---|
[35aab3] | 754 | h->lcm=NULL; |
---|
[f53fdf] | 755 | #endif |
---|
[35aab3] | 756 | return 0; |
---|
| 757 | } |
---|
| 758 | h->SetShortExpVector(); |
---|
| 759 | not_sev = ~ h->sev; |
---|
| 760 | h_d = h->SetpFDeg(); |
---|
| 761 | /* compute the ecart */ |
---|
| 762 | if (ei <= h->ecart) |
---|
| 763 | h->ecart = d-h_d; |
---|
[822aa3a] | 764 | else |
---|
[35aab3] | 765 | h->ecart = d-h_d+ei-h->ecart; |
---|
[f53fdf] | 766 | |
---|
[35aab3] | 767 | /* |
---|
| 768 | * try to reduce the s-polynomial h |
---|
| 769 | *test first whether h should go to the lazyset L |
---|
| 770 | *-if the degree jumps |
---|
| 771 | *-if the number of pre-defined reductions jumps |
---|
| 772 | */ |
---|
| 773 | pass++; |
---|
| 774 | d = h_d + h->ecart; |
---|
[228b631] | 775 | if (!TEST_OPT_REDTHROUGH && (strat->Ll >= 0) && ((d > reddeg) || (pass > strat->LazyPass))) |
---|
[35aab3] | 776 | { |
---|
[f53fdf] | 777 | h->GetTP(); // clear bucket |
---|
[35aab3] | 778 | h->SetLmCurrRing(); |
---|
| 779 | at = strat->posInL(strat->L,strat->Ll,h,strat); |
---|
| 780 | if (at <= strat->Ll) |
---|
| 781 | { |
---|
[391323] | 782 | int dummy=strat->sl; |
---|
| 783 | if (kFindDivisibleByInS(strat, &dummy, h) < 0) |
---|
[35aab3] | 784 | return 1; |
---|
| 785 | enterL(&strat->L,&strat->Ll,&strat->Lmax,*h,at); |
---|
| 786 | #ifdef KDEBUG |
---|
| 787 | if (TEST_OPT_DEBUG) |
---|
| 788 | Print(" degree jumped: -> L%d\n",at); |
---|
| 789 | #endif |
---|
| 790 | h->Clear(); |
---|
| 791 | return -1; |
---|
| 792 | } |
---|
| 793 | } |
---|
[f7feb7] | 794 | else if (d > reddeg) |
---|
[35aab3] | 795 | { |
---|
[f7feb7] | 796 | if (d>=strat->tailRing->bitmask) |
---|
| 797 | { |
---|
[8d679fd] | 798 | if (h->pTotalDeg()+h->ecart >= strat->tailRing->bitmask) |
---|
| 799 | { |
---|
| 800 | strat->overflow=TRUE; |
---|
[d5564f8] | 801 | //Print("OVERFLOW in redHoney d=%ld, max=%ld\n",d,strat->tailRing->bitmask); |
---|
[8d679fd] | 802 | h->GetP(); |
---|
| 803 | at = strat->posInL(strat->L,strat->Ll,h,strat); |
---|
| 804 | enterL(&strat->L,&strat->Ll,&strat->Lmax,*h,at); |
---|
| 805 | h->Clear(); |
---|
[d5564f8] | 806 | return -1; |
---|
| 807 | } |
---|
[f7feb7] | 808 | } |
---|
| 809 | else if (TEST_OPT_PROT && (strat->Ll < 0) ) |
---|
| 810 | { |
---|
| 811 | //h->wrp(); Print("<%d>\n",h->GetpLength()); |
---|
| 812 | reddeg = d; |
---|
| 813 | Print(".%ld",d); mflush(); |
---|
| 814 | } |
---|
[35aab3] | 815 | } |
---|
| 816 | } |
---|
| 817 | } |
---|
| 818 | /*2 |
---|
| 819 | * reduction procedure for the normal form |
---|
| 820 | */ |
---|
| 821 | |
---|
[ab1c36] | 822 | poly redNF (poly h,int &max_ind,int nonorm,kStrategy strat) |
---|
[35aab3] | 823 | { |
---|
| 824 | if (h==NULL) return NULL; |
---|
| 825 | int j; |
---|
[391323] | 826 | max_ind=strat->sl; |
---|
[35aab3] | 827 | |
---|
| 828 | if (0 > strat->sl) |
---|
| 829 | { |
---|
| 830 | return h; |
---|
| 831 | } |
---|
| 832 | LObject P(h); |
---|
| 833 | P.SetShortExpVector(); |
---|
| 834 | P.bucket = kBucketCreate(currRing); |
---|
| 835 | kBucketInit(P.bucket,P.p,pLength(P.p)); |
---|
[c5f67b5] | 836 | kbTest(P.bucket); |
---|
[40d3462] | 837 | #ifdef HAVE_RINGS |
---|
| 838 | BOOLEAN is_ring = rField_is_Ring(currRing); |
---|
| 839 | #endif |
---|
[35aab3] | 840 | loop |
---|
| 841 | { |
---|
[d772c3] | 842 | j=kFindDivisibleByInS(strat,&max_ind,&P); |
---|
[35aab3] | 843 | if (j>=0) |
---|
| 844 | { |
---|
[40d3462] | 845 | #ifdef HAVE_RINGS |
---|
| 846 | if (!is_ring) |
---|
| 847 | { |
---|
| 848 | #endif |
---|
[ab1c36] | 849 | int sl=pSize(strat->S[j]); |
---|
| 850 | int jj=j; |
---|
| 851 | loop |
---|
[7ba059] | 852 | { |
---|
[ab1c36] | 853 | int sll; |
---|
| 854 | jj=kFindNextDivisibleByInS(strat,jj+1,max_ind,&P); |
---|
| 855 | if (jj<0) break; |
---|
| 856 | sll=pSize(strat->S[jj]); |
---|
[08ab82] | 857 | if (sll<sl) |
---|
| 858 | { |
---|
| 859 | #ifdef KDEBUG |
---|
| 860 | if (TEST_OPT_DEBUG) Print("better(S%d:%d -> S%d:%d)\n",j,sl,jj,sll); |
---|
| 861 | #endif |
---|
[a589e6] | 862 | //else if (TEST_OPT_PROT) { PrintS("b"); mflush(); } |
---|
[19408c] | 863 | j=jj; |
---|
| 864 | sl=sll; |
---|
[08ab82] | 865 | } |
---|
[7ba059] | 866 | } |
---|
[1863d8] | 867 | if ((nonorm==0) && (!nIsOne(pGetCoeff(strat->S[j])))) |
---|
[ab1c36] | 868 | { |
---|
| 869 | pNorm(strat->S[j]); |
---|
| 870 | //if (TEST_OPT_PROT) { PrintS("n"); mflush(); } |
---|
| 871 | } |
---|
[40d3462] | 872 | #ifdef HAVE_RINGS |
---|
| 873 | } |
---|
| 874 | #endif |
---|
[35aab3] | 875 | nNormalize(pGetCoeff(P.p)); |
---|
| 876 | #ifdef KDEBUG |
---|
| 877 | if (TEST_OPT_DEBUG) |
---|
| 878 | { |
---|
| 879 | PrintS("red:"); |
---|
| 880 | wrp(h); |
---|
| 881 | PrintS(" with "); |
---|
| 882 | wrp(strat->S[j]); |
---|
| 883 | } |
---|
| 884 | #endif |
---|
| 885 | #ifdef HAVE_PLURAL |
---|
| 886 | if (rIsPluralRing(currRing)) |
---|
| 887 | { |
---|
[c5f67b5] | 888 | number coef; |
---|
[19370c] | 889 | nc_kBucketPolyRed(P.bucket,strat->S[j],&coef); |
---|
[c5f67b5] | 890 | nDelete(&coef); |
---|
[35aab3] | 891 | } |
---|
| 892 | else |
---|
| 893 | #endif |
---|
| 894 | { |
---|
| 895 | number coef; |
---|
| 896 | coef=kBucketPolyRed(P.bucket,strat->S[j],pLength(strat->S[j]),strat->kNoether); |
---|
| 897 | nDelete(&coef); |
---|
| 898 | } |
---|
[cea6f3] | 899 | h = kBucketGetLm(P.bucket); // FRAGE OLIVER |
---|
[35aab3] | 900 | if (h==NULL) |
---|
| 901 | { |
---|
| 902 | kBucketDestroy(&P.bucket); |
---|
| 903 | return NULL; |
---|
| 904 | } |
---|
[c5f67b5] | 905 | kbTest(P.bucket); |
---|
[35aab3] | 906 | P.p=h; |
---|
| 907 | P.t_p=NULL; |
---|
| 908 | P.SetShortExpVector(); |
---|
| 909 | #ifdef KDEBUG |
---|
| 910 | if (TEST_OPT_DEBUG) |
---|
| 911 | { |
---|
| 912 | PrintS("\nto:"); |
---|
| 913 | wrp(h); |
---|
| 914 | PrintLn(); |
---|
| 915 | } |
---|
| 916 | #endif |
---|
| 917 | } |
---|
| 918 | else |
---|
| 919 | { |
---|
| 920 | P.p=kBucketClear(P.bucket); |
---|
| 921 | kBucketDestroy(&P.bucket); |
---|
| 922 | pNormalize(P.p); |
---|
| 923 | return P.p; |
---|
| 924 | } |
---|
| 925 | } |
---|
| 926 | } |
---|
| 927 | |
---|
| 928 | #ifdef KDEBUG |
---|
| 929 | static int bba_count = 0; |
---|
[645a19] | 930 | #endif /* KDEBUG */ |
---|
[79d3879] | 931 | void kDebugPrint(kStrategy strat); |
---|
[35aab3] | 932 | |
---|
| 933 | ideal bba (ideal F, ideal Q,intvec *w,intvec *hilb,kStrategy strat) |
---|
| 934 | { |
---|
| 935 | #ifdef KDEBUG |
---|
| 936 | bba_count++; |
---|
| 937 | int loop_count = 0; |
---|
[645a19] | 938 | #endif /* KDEBUG */ |
---|
[35aab3] | 939 | om_Opts.MinTrack = 5; |
---|
| 940 | int srmax,lrmax, red_result = 1; |
---|
| 941 | int olddeg,reduc; |
---|
| 942 | int hilbeledeg=1,hilbcount=0,minimcnt=0; |
---|
| 943 | BOOLEAN withT = FALSE; |
---|
| 944 | |
---|
| 945 | initBuchMoraCrit(strat); /*set Gebauer, honey, sugarCrit*/ |
---|
| 946 | initBuchMoraPos(strat); |
---|
| 947 | initHilbCrit(F,Q,&hilb,strat); |
---|
| 948 | initBba(F,strat); |
---|
| 949 | /*set enterS, spSpolyShort, reduce, red, initEcart, initEcartPair*/ |
---|
| 950 | /*Shdl=*/initBuchMora(F, Q,strat); |
---|
| 951 | if (strat->minim>0) strat->M=idInit(IDELEMS(F),F->rank); |
---|
| 952 | srmax = strat->sl; |
---|
| 953 | reduc = olddeg = lrmax = 0; |
---|
| 954 | |
---|
| 955 | #ifndef NO_BUCKETS |
---|
| 956 | if (!TEST_OPT_NOT_BUCKETS) |
---|
| 957 | strat->use_buckets = 1; |
---|
| 958 | #endif |
---|
| 959 | |
---|
| 960 | // redtailBBa against T for inhomogenous input |
---|
[228b631] | 961 | if (!TEST_OPT_OLDSTD) |
---|
[35aab3] | 962 | withT = ! strat->homog; |
---|
| 963 | |
---|
| 964 | // strat->posInT = posInT_pLength; |
---|
| 965 | kTest_TS(strat); |
---|
| 966 | |
---|
[645a19] | 967 | #ifdef KDEBUG |
---|
| 968 | #if MYTEST |
---|
[9982049] | 969 | if (TEST_OPT_DEBUG) |
---|
[8d679fd] | 970 | { |
---|
[9982049] | 971 | PrintS("bba start GB: currRing: "); |
---|
| 972 | // rWrite(currRing);PrintLn(); |
---|
| 973 | rDebugPrint(currRing); |
---|
| 974 | PrintLn(); |
---|
[645a19] | 975 | } |
---|
| 976 | #endif /* MYTEST */ |
---|
| 977 | #endif /* KDEBUG */ |
---|
| 978 | |
---|
[35aab3] | 979 | #ifdef HAVE_TAIL_RING |
---|
[94ebce] | 980 | if(!idIs0(F) &&(!rField_is_Ring())) // create strong gcd poly computes with tailring and S[i] ->to be fixed |
---|
[645a19] | 981 | kStratInitChangeTailRing(strat); |
---|
[35aab3] | 982 | #endif |
---|
[d5564f8] | 983 | if (BVERBOSE(23)) |
---|
[57fad3a] | 984 | { |
---|
| 985 | if (test_PosInT!=NULL) strat->posInT=test_PosInT; |
---|
| 986 | if (test_PosInL!=NULL) strat->posInL=test_PosInL; |
---|
| 987 | kDebugPrint(strat); |
---|
| 988 | } |
---|
| 989 | |
---|
[35aab3] | 990 | |
---|
[8d679fd] | 991 | #ifdef KDEBUG |
---|
| 992 | //kDebugPrint(strat); |
---|
| 993 | #endif |
---|
[35aab3] | 994 | /* compute------------------------------------------------------- */ |
---|
| 995 | while (strat->Ll >= 0) |
---|
| 996 | { |
---|
| 997 | if (strat->Ll > lrmax) lrmax =strat->Ll;/*stat.*/ |
---|
[08ab82] | 998 | #ifdef KDEBUG |
---|
| 999 | loop_count++; |
---|
| 1000 | if (TEST_OPT_DEBUG) messageSets(strat); |
---|
| 1001 | #endif |
---|
[35aab3] | 1002 | if (strat->Ll== 0) strat->interpt=TRUE; |
---|
| 1003 | if (TEST_OPT_DEGBOUND |
---|
[b130fb] | 1004 | && ((strat->honey && (strat->L[strat->Ll].ecart+pFDeg(strat->L[strat->Ll].p,currRing)>Kstd1_deg)) |
---|
| 1005 | || ((!strat->honey) && (pFDeg(strat->L[strat->Ll].p,currRing)>Kstd1_deg)))) |
---|
[35aab3] | 1006 | { |
---|
| 1007 | /* |
---|
| 1008 | *stops computation if |
---|
| 1009 | * 24 IN test and the degree +ecart of L[strat->Ll] is bigger then |
---|
| 1010 | *a predefined number Kstd1_deg |
---|
| 1011 | */ |
---|
[939847] | 1012 | while ((strat->Ll >= 0) |
---|
[977f94] | 1013 | && (strat->L[strat->Ll].p1!=NULL) && (strat->L[strat->Ll].p2!=NULL) |
---|
[939847] | 1014 | && ((strat->honey && (strat->L[strat->Ll].ecart+pFDeg(strat->L[strat->Ll].p,currRing)>Kstd1_deg)) |
---|
| 1015 | || ((!strat->honey) && (pFDeg(strat->L[strat->Ll].p,currRing)>Kstd1_deg))) |
---|
[977f94] | 1016 | ) |
---|
[019649] | 1017 | deleteInL(strat->L,&strat->Ll,strat->Ll,strat); |
---|
| 1018 | if (strat->Ll<0) break; |
---|
[3957e37] | 1019 | else strat->noClearS=TRUE; |
---|
[35aab3] | 1020 | } |
---|
| 1021 | /* picks the last element from the lazyset L */ |
---|
| 1022 | strat->P = strat->L[strat->Ll]; |
---|
| 1023 | strat->Ll--; |
---|
| 1024 | |
---|
| 1025 | if (pNext(strat->P.p) == strat->tail) |
---|
| 1026 | { |
---|
| 1027 | // deletes the short spoly |
---|
[a539ad] | 1028 | #ifdef HAVE_RINGS |
---|
| 1029 | if (rField_is_Ring(currRing)) |
---|
| 1030 | pLmDelete(strat->P.p); |
---|
| 1031 | else |
---|
| 1032 | #endif |
---|
| 1033 | pLmFree(strat->P.p); |
---|
[35aab3] | 1034 | strat->P.p = NULL; |
---|
| 1035 | poly m1 = NULL, m2 = NULL; |
---|
| 1036 | |
---|
| 1037 | // check that spoly creation is ok |
---|
| 1038 | while (strat->tailRing != currRing && |
---|
| 1039 | !kCheckSpolyCreation(&(strat->P), strat, m1, m2)) |
---|
| 1040 | { |
---|
| 1041 | assume(m1 == NULL && m2 == NULL); |
---|
| 1042 | // if not, change to a ring where exponents are at least |
---|
| 1043 | // large enough |
---|
[7ae94b] | 1044 | if (!kStratChangeTailRing(strat)) |
---|
| 1045 | { |
---|
[8d679fd] | 1046 | WerrorS("OVERFLOW..."); |
---|
[7ae94b] | 1047 | break; |
---|
| 1048 | } |
---|
[35aab3] | 1049 | } |
---|
| 1050 | // create the real one |
---|
| 1051 | ksCreateSpoly(&(strat->P), NULL, strat->use_buckets, |
---|
| 1052 | strat->tailRing, m1, m2, strat->R); |
---|
| 1053 | } |
---|
| 1054 | else if (strat->P.p1 == NULL) |
---|
| 1055 | { |
---|
| 1056 | if (strat->minim > 0) |
---|
| 1057 | strat->P.p2=p_Copy(strat->P.p, currRing, strat->tailRing); |
---|
| 1058 | // for input polys, prepare reduction |
---|
| 1059 | strat->P.PrepareRed(strat->use_buckets); |
---|
| 1060 | } |
---|
| 1061 | |
---|
[977f94] | 1062 | if (strat->P.p == NULL && strat->P.t_p == NULL) |
---|
| 1063 | { |
---|
[cea6f3] | 1064 | red_result = 0; |
---|
| 1065 | } |
---|
| 1066 | else |
---|
| 1067 | { |
---|
| 1068 | if (TEST_OPT_PROT) |
---|
| 1069 | message((strat->honey ? strat->P.ecart : 0) + strat->P.pFDeg(), |
---|
| 1070 | &olddeg,&reduc,strat, red_result); |
---|
[35aab3] | 1071 | |
---|
[cea6f3] | 1072 | /* reduction of the element choosen from L */ |
---|
| 1073 | red_result = strat->red(&strat->P,strat); |
---|
[d5564f8] | 1074 | if (errorreported) break; |
---|
| 1075 | } |
---|
| 1076 | |
---|
| 1077 | if (strat->overflow) |
---|
| 1078 | { |
---|
| 1079 | if (!kStratChangeTailRing(strat)) { Werror("OVERFLOW.."); break;} |
---|
[cea6f3] | 1080 | } |
---|
[35aab3] | 1081 | |
---|
| 1082 | // reduction to non-zero new poly |
---|
| 1083 | if (red_result == 1) |
---|
| 1084 | { |
---|
| 1085 | // get the polynomial (canonicalize bucket, make sure P.p is set) |
---|
| 1086 | strat->P.GetP(strat->lmBin); |
---|
| 1087 | |
---|
[d5564f8] | 1088 | /* statistic */ |
---|
| 1089 | if (TEST_OPT_PROT) PrintS("s"); |
---|
| 1090 | |
---|
[35aab3] | 1091 | int pos=posInS(strat,strat->sl,strat->P.p,strat->P.ecart); |
---|
| 1092 | |
---|
[645a19] | 1093 | #ifdef KDEBUG |
---|
| 1094 | #if MYTEST |
---|
| 1095 | PrintS("New S: "); pDebugPrint(strat->P.p); PrintLn(); |
---|
| 1096 | #endif /* MYTEST */ |
---|
| 1097 | #endif /* KDEBUG */ |
---|
| 1098 | |
---|
[35aab3] | 1099 | // reduce the tail and normalize poly |
---|
[521349] | 1100 | // in the ring case we cannot expect LC(f) = 1, |
---|
| 1101 | // therefore we call pContent instead of pNorm |
---|
| 1102 | if ((TEST_OPT_INTSTRATEGY) || (rField_is_Ring(currRing))) |
---|
[35aab3] | 1103 | { |
---|
| 1104 | strat->P.pCleardenom(); |
---|
| 1105 | if ((TEST_OPT_REDSB)||(TEST_OPT_REDTAIL)) |
---|
| 1106 | { |
---|
| 1107 | strat->P.p = redtailBba(&(strat->P),pos-1,strat, withT); |
---|
| 1108 | strat->P.pCleardenom(); |
---|
| 1109 | } |
---|
| 1110 | } |
---|
| 1111 | else |
---|
| 1112 | { |
---|
| 1113 | strat->P.pNorm(); |
---|
| 1114 | if ((TEST_OPT_REDSB)||(TEST_OPT_REDTAIL)) |
---|
| 1115 | strat->P.p = redtailBba(&(strat->P),pos-1,strat, withT); |
---|
| 1116 | } |
---|
| 1117 | |
---|
| 1118 | #ifdef KDEBUG |
---|
| 1119 | if (TEST_OPT_DEBUG){PrintS("new s:");strat->P.wrp();PrintLn();} |
---|
[645a19] | 1120 | #if MYTEST |
---|
| 1121 | PrintS("New (reduced) S: "); pDebugPrint(strat->P.p); PrintLn(); |
---|
| 1122 | #endif /* MYTEST */ |
---|
| 1123 | #endif /* KDEBUG */ |
---|
[35aab3] | 1124 | |
---|
| 1125 | // min_std stuff |
---|
| 1126 | if ((strat->P.p1==NULL) && (strat->minim>0)) |
---|
| 1127 | { |
---|
| 1128 | if (strat->minim==1) |
---|
| 1129 | { |
---|
| 1130 | strat->M->m[minimcnt]=p_Copy(strat->P.p,currRing,strat->tailRing); |
---|
| 1131 | p_Delete(&strat->P.p2, currRing, strat->tailRing); |
---|
| 1132 | } |
---|
| 1133 | else |
---|
| 1134 | { |
---|
| 1135 | strat->M->m[minimcnt]=strat->P.p2; |
---|
| 1136 | strat->P.p2=NULL; |
---|
| 1137 | } |
---|
| 1138 | if (strat->tailRing!=currRing && pNext(strat->M->m[minimcnt])!=NULL) |
---|
| 1139 | pNext(strat->M->m[minimcnt]) |
---|
| 1140 | = strat->p_shallow_copy_delete(pNext(strat->M->m[minimcnt]), |
---|
| 1141 | strat->tailRing, currRing, |
---|
| 1142 | currRing->PolyBin); |
---|
| 1143 | minimcnt++; |
---|
| 1144 | } |
---|
| 1145 | |
---|
| 1146 | // enter into S, L, and T |
---|
[b981502] | 1147 | //if ((!TEST_OPT_IDLIFT) || (pGetComp(strat->P.p) <= strat->syzComp)) |
---|
[f0b6c9] | 1148 | enterT(strat->P, strat); |
---|
[206e158] | 1149 | #ifdef HAVE_RINGS |
---|
| 1150 | if (rField_is_Ring(currRing)) |
---|
[f92547] | 1151 | superenterpairs(strat->P.p,strat->sl,strat->P.ecart,pos,strat, strat->tl); |
---|
| 1152 | else |
---|
| 1153 | #endif |
---|
| 1154 | enterpairs(strat->P.p,strat->sl,strat->P.ecart,pos,strat, strat->tl); |
---|
[35aab3] | 1155 | // posInS only depends on the leading term |
---|
| 1156 | strat->enterS(strat->P, pos, strat, strat->tl); |
---|
[f0b6c9] | 1157 | #if 0 |
---|
[b2c236] | 1158 | int pl=pLength(strat->P.p); |
---|
| 1159 | if (pl==1) |
---|
| 1160 | { |
---|
| 1161 | //if (TEST_OPT_PROT) |
---|
| 1162 | //PrintS("<1>"); |
---|
| 1163 | } |
---|
| 1164 | else if (pl==2) |
---|
| 1165 | { |
---|
| 1166 | //if (TEST_OPT_PROT) |
---|
| 1167 | //PrintS("<2>"); |
---|
| 1168 | } |
---|
[f0b6c9] | 1169 | #endif |
---|
[35aab3] | 1170 | if (hilb!=NULL) khCheck(Q,w,hilb,hilbeledeg,hilbcount,strat); |
---|
| 1171 | // Print("[%d]",hilbeledeg); |
---|
[1e36c5] | 1172 | if (strat->P.lcm!=NULL) |
---|
| 1173 | #ifdef HAVE_RINGS |
---|
| 1174 | pLmDelete(strat->P.lcm); |
---|
| 1175 | #else |
---|
| 1176 | pLmFree(strat->P.lcm); |
---|
| 1177 | #endif |
---|
[35aab3] | 1178 | if (strat->sl>srmax) srmax = strat->sl; |
---|
| 1179 | } |
---|
| 1180 | else if (strat->P.p1 == NULL && strat->minim > 0) |
---|
| 1181 | { |
---|
| 1182 | p_Delete(&strat->P.p2, currRing, strat->tailRing); |
---|
| 1183 | } |
---|
[a539ad] | 1184 | |
---|
[35aab3] | 1185 | #ifdef KDEBUG |
---|
| 1186 | memset(&(strat->P), 0, sizeof(strat->P)); |
---|
[645a19] | 1187 | #endif /* KDEBUG */ |
---|
[35aab3] | 1188 | kTest_TS(strat); |
---|
| 1189 | } |
---|
| 1190 | #ifdef KDEBUG |
---|
[645a19] | 1191 | #if MYTEST |
---|
| 1192 | PrintS("bba finish GB: currRing: "); rWrite(currRing); |
---|
| 1193 | #endif /* MYTEST */ |
---|
[35aab3] | 1194 | if (TEST_OPT_DEBUG) messageSets(strat); |
---|
[645a19] | 1195 | #endif /* KDEBUG */ |
---|
| 1196 | |
---|
[07b1cf] | 1197 | if (TEST_OPT_SB_1) |
---|
| 1198 | { |
---|
| 1199 | int k=1; |
---|
| 1200 | int j; |
---|
| 1201 | while(k<=strat->sl) |
---|
| 1202 | { |
---|
| 1203 | j=0; |
---|
| 1204 | loop |
---|
| 1205 | { |
---|
| 1206 | if (j>=k) break; |
---|
| 1207 | clearS(strat->S[j],strat->sevS[j],&k,&j,strat); |
---|
| 1208 | j++; |
---|
| 1209 | } |
---|
| 1210 | k++; |
---|
| 1211 | } |
---|
| 1212 | } |
---|
| 1213 | |
---|
[93f4bb] | 1214 | /* complete reduction of the standard basis--------- */ |
---|
[533634] | 1215 | if (TEST_OPT_REDSB) |
---|
[b57694] | 1216 | { |
---|
[533634] | 1217 | completeReduce(strat); |
---|
[cbc616] | 1218 | #ifdef HAVE_TAIL_RING |
---|
[b57694] | 1219 | if (strat->completeReduce_retry) |
---|
| 1220 | { |
---|
[533634] | 1221 | // completeReduce needed larger exponents, retry |
---|
| 1222 | // to reduce with S (instead of T) |
---|
| 1223 | // and in currRing (instead of strat->tailRing) |
---|
[b57694] | 1224 | cleanT(strat);strat->tailRing=currRing; |
---|
| 1225 | int i; |
---|
| 1226 | for(i=strat->sl;i>=0;i--) strat->S_2_R[i]=-1; |
---|
| 1227 | completeReduce(strat); |
---|
| 1228 | } |
---|
[cbc616] | 1229 | #endif |
---|
[b57694] | 1230 | } |
---|
[5accf0] | 1231 | else if (TEST_OPT_PROT) PrintLn(); |
---|
[533634] | 1232 | |
---|
[35aab3] | 1233 | /* release temp data-------------------------------- */ |
---|
| 1234 | exitBuchMora(strat); |
---|
| 1235 | if (TEST_OPT_WEIGHTM) |
---|
| 1236 | { |
---|
| 1237 | pRestoreDegProcs(pFDegOld, pLDegOld); |
---|
| 1238 | if (ecartWeights) |
---|
| 1239 | { |
---|
| 1240 | omFreeSize((ADDRESS)ecartWeights,(pVariables+1)*sizeof(short)); |
---|
| 1241 | ecartWeights=NULL; |
---|
| 1242 | } |
---|
| 1243 | } |
---|
| 1244 | if (TEST_OPT_PROT) messageStat(srmax,lrmax,hilbcount,strat); |
---|
| 1245 | if (Q!=NULL) updateResult(strat->Shdl,Q,strat); |
---|
[645a19] | 1246 | |
---|
| 1247 | #ifdef KDEBUG |
---|
| 1248 | #if MYTEST |
---|
| 1249 | PrintS("bba_end: currRing: "); rWrite(currRing); |
---|
| 1250 | #endif /* MYTEST */ |
---|
| 1251 | #endif /* KDEBUG */ |
---|
| 1252 | idTest(strat->Shdl); |
---|
| 1253 | |
---|
[35aab3] | 1254 | return (strat->Shdl); |
---|
| 1255 | } |
---|
[cbc616] | 1256 | |
---|
[35aab3] | 1257 | poly kNF2 (ideal F,ideal Q,poly q,kStrategy strat, int lazyReduce) |
---|
| 1258 | { |
---|
[822aa3a] | 1259 | assume(q!=NULL); |
---|
[645a19] | 1260 | assume(!(idIs0(F)&&(Q==NULL))); // NF(q, std(0) in polynomial ring? |
---|
[822aa3a] | 1261 | |
---|
[93f4bb] | 1262 | // lazy_reduce flags: can be combined by | |
---|
| 1263 | //#define KSTD_NF_LAZY 1 |
---|
| 1264 | // do only a reduction of the leading term |
---|
| 1265 | //#define KSTD_NF_NONORM 4 |
---|
| 1266 | // only global: avoid normalization, return a multiply of NF |
---|
[35aab3] | 1267 | poly p; |
---|
| 1268 | int i; |
---|
| 1269 | |
---|
[822aa3a] | 1270 | //if ((idIs0(F))&&(Q==NULL)) |
---|
| 1271 | // return pCopy(q); /*F=0*/ |
---|
[1ee19dc] | 1272 | //strat->ak = idRankFreeModule(F); |
---|
[35aab3] | 1273 | /*- creating temp data structures------------------- -*/ |
---|
| 1274 | BITSET save_test=test; |
---|
| 1275 | test|=Sy_bit(OPT_REDTAIL); |
---|
| 1276 | initBuchMoraCrit(strat); |
---|
| 1277 | strat->initEcart = initEcartBBA; |
---|
| 1278 | strat->enterS = enterSBba; |
---|
[6ad5ce] | 1279 | #ifndef NO_BUCKETS |
---|
| 1280 | strat->use_buckets = (!TEST_OPT_NOT_BUCKETS) && (!rIsPluralRing(currRing)); |
---|
| 1281 | #endif |
---|
[35aab3] | 1282 | /*- set S -*/ |
---|
| 1283 | strat->sl = -1; |
---|
| 1284 | /*- init local data struct.---------------------------------------- -*/ |
---|
| 1285 | /*Shdl=*/initS(F,Q,strat); |
---|
| 1286 | /*- compute------------------------------------------------------- -*/ |
---|
| 1287 | //if ((TEST_OPT_INTSTRATEGY)&&(lazyReduce==0)) |
---|
[78b904] | 1288 | //{ |
---|
| 1289 | // for (i=strat->sl;i>=0;i--) |
---|
| 1290 | // pNorm(strat->S[i]); |
---|
| 1291 | //} |
---|
[35aab3] | 1292 | kTest(strat); |
---|
| 1293 | if (TEST_OPT_PROT) { PrintS("r"); mflush(); } |
---|
[391323] | 1294 | int max_ind; |
---|
[ab1c36] | 1295 | p = redNF(pCopy(q),max_ind,lazyReduce & KSTD_NF_NONORM,strat); |
---|
[18ff4c] | 1296 | if ((p!=NULL)&&((lazyReduce & KSTD_NF_LAZY)==0)) |
---|
[35aab3] | 1297 | { |
---|
| 1298 | if (TEST_OPT_PROT) { PrintS("t"); mflush(); } |
---|
[5eb865] | 1299 | #ifdef HAVE_RINGS |
---|
| 1300 | if (rField_is_Ring()) |
---|
| 1301 | { |
---|
| 1302 | p = redtailBba_Z(p,max_ind,strat); |
---|
| 1303 | } |
---|
| 1304 | else |
---|
| 1305 | #endif |
---|
| 1306 | { |
---|
| 1307 | BITSET save=test; |
---|
| 1308 | test &= ~Sy_bit(OPT_INTSTRATEGY); |
---|
| 1309 | p = redtailBba(p,max_ind,strat,(lazyReduce & KSTD_NF_NONORM)==0); |
---|
| 1310 | test=save; |
---|
| 1311 | } |
---|
[35aab3] | 1312 | } |
---|
| 1313 | /*- release temp data------------------------------- -*/ |
---|
| 1314 | omfree(strat->sevS); |
---|
| 1315 | omfree(strat->ecartS); |
---|
| 1316 | omfree(strat->T); |
---|
| 1317 | omfree(strat->sevT); |
---|
| 1318 | omfree(strat->R); |
---|
| 1319 | omfree(strat->S_2_R); |
---|
| 1320 | omfree(strat->L); |
---|
| 1321 | omfree(strat->B); |
---|
| 1322 | omfree(strat->fromQ); |
---|
| 1323 | idDelete(&strat->Shdl); |
---|
| 1324 | test=save_test; |
---|
| 1325 | if (TEST_OPT_PROT) PrintLn(); |
---|
| 1326 | return p; |
---|
| 1327 | } |
---|
| 1328 | |
---|
| 1329 | ideal kNF2 (ideal F,ideal Q,ideal q,kStrategy strat, int lazyReduce) |
---|
| 1330 | { |
---|
[822aa3a] | 1331 | assume(!idIs0(q)); |
---|
| 1332 | assume(!(idIs0(F)&&(Q==NULL))); |
---|
[93f4bb] | 1333 | // lazy_reduce flags: can be combined by | |
---|
| 1334 | //#define KSTD_NF_LAZY 1 |
---|
| 1335 | // do only a reduction of the leading term |
---|
| 1336 | //#define KSTD_NF_NONORM 4 |
---|
| 1337 | // only global: avoid normalization, return a multiply of NF |
---|
[35aab3] | 1338 | poly p; |
---|
| 1339 | int i; |
---|
| 1340 | ideal res; |
---|
[391323] | 1341 | int max_ind; |
---|
[35aab3] | 1342 | |
---|
[822aa3a] | 1343 | //if (idIs0(q)) |
---|
| 1344 | // return idInit(IDELEMS(q),si_max(q->rank,F->rank)); |
---|
| 1345 | //if ((idIs0(F))&&(Q==NULL)) |
---|
| 1346 | // return idCopy(q); /*F=0*/ |
---|
[1ee19dc] | 1347 | //strat->ak = idRankFreeModule(F); |
---|
[35aab3] | 1348 | /*- creating temp data structures------------------- -*/ |
---|
| 1349 | BITSET save_test=test; |
---|
| 1350 | test|=Sy_bit(OPT_REDTAIL); |
---|
| 1351 | initBuchMoraCrit(strat); |
---|
| 1352 | strat->initEcart = initEcartBBA; |
---|
| 1353 | strat->enterS = enterSBba; |
---|
| 1354 | /*- set S -*/ |
---|
| 1355 | strat->sl = -1; |
---|
[6ad5ce] | 1356 | #ifndef NO_BUCKETS |
---|
| 1357 | strat->use_buckets = (!TEST_OPT_NOT_BUCKETS) && (!rIsPluralRing(currRing)); |
---|
| 1358 | #endif |
---|
[35aab3] | 1359 | /*- init local data struct.---------------------------------------- -*/ |
---|
| 1360 | /*Shdl=*/initS(F,Q,strat); |
---|
| 1361 | /*- compute------------------------------------------------------- -*/ |
---|
[baa72c5] | 1362 | res=idInit(IDELEMS(q),si_max(q->rank,F->rank)); |
---|
[5eb865] | 1363 | BITSET save=test; |
---|
| 1364 | test &= ~Sy_bit(OPT_INTSTRATEGY); |
---|
[35aab3] | 1365 | for (i=IDELEMS(q)-1; i>=0; i--) |
---|
| 1366 | { |
---|
| 1367 | if (q->m[i]!=NULL) |
---|
| 1368 | { |
---|
| 1369 | if (TEST_OPT_PROT) { PrintS("r");mflush(); } |
---|
[ab1c36] | 1370 | p = redNF(pCopy(q->m[i]),max_ind,lazyReduce & KSTD_NF_NONORM,strat); |
---|
[18ff4c] | 1371 | if ((p!=NULL)&&((lazyReduce & KSTD_NF_LAZY)==0)) |
---|
[35aab3] | 1372 | { |
---|
| 1373 | if (TEST_OPT_PROT) { PrintS("t"); mflush(); } |
---|
[5eb865] | 1374 | #ifdef HAVE_RINGS |
---|
| 1375 | if (rField_is_Ring()) |
---|
| 1376 | { |
---|
| 1377 | p = redtailBba_Z(p,max_ind,strat); |
---|
| 1378 | } |
---|
| 1379 | else |
---|
| 1380 | #endif |
---|
| 1381 | { |
---|
| 1382 | p = redtailBba(p,max_ind,strat,(lazyReduce & KSTD_NF_NONORM)==0); |
---|
| 1383 | } |
---|
[35aab3] | 1384 | } |
---|
| 1385 | res->m[i]=p; |
---|
| 1386 | } |
---|
| 1387 | //else |
---|
| 1388 | // res->m[i]=NULL; |
---|
| 1389 | } |
---|
| 1390 | /*- release temp data------------------------------- -*/ |
---|
[5eb865] | 1391 | test=save; |
---|
[35aab3] | 1392 | omfree(strat->sevS); |
---|
| 1393 | omfree(strat->ecartS); |
---|
| 1394 | omfree(strat->T); |
---|
| 1395 | omfree(strat->sevT); |
---|
| 1396 | omfree(strat->R); |
---|
| 1397 | omfree(strat->S_2_R); |
---|
| 1398 | omfree(strat->L); |
---|
| 1399 | omfree(strat->B); |
---|
| 1400 | omfree(strat->fromQ); |
---|
| 1401 | idDelete(&strat->Shdl); |
---|
| 1402 | test=save_test; |
---|
| 1403 | if (TEST_OPT_PROT) PrintLn(); |
---|
| 1404 | return res; |
---|
| 1405 | } |
---|
[dd2855] | 1406 | |
---|
[cb0fbe] | 1407 | /* shiftgb stuff */ |
---|
[037df4] | 1408 | #ifdef HAVE_SHIFTBBA |
---|
[37a4c3] | 1409 | |
---|
[07625cb] | 1410 | |
---|
[cb0fbe] | 1411 | ideal bbaShift(ideal F, ideal Q,intvec *w,intvec *hilb,kStrategy strat, int uptodeg, int lV) |
---|
| 1412 | { |
---|
| 1413 | #ifdef KDEBUG |
---|
| 1414 | bba_count++; |
---|
| 1415 | int loop_count = 0; |
---|
| 1416 | #endif |
---|
| 1417 | om_Opts.MinTrack = 5; |
---|
| 1418 | int srmax,lrmax, red_result = 1; |
---|
| 1419 | int olddeg,reduc; |
---|
| 1420 | int hilbeledeg=1,hilbcount=0,minimcnt=0; |
---|
[4d43ff] | 1421 | BOOLEAN withT = TRUE; // very important for shifts |
---|
[cb0fbe] | 1422 | |
---|
[37a4c3] | 1423 | initBuchMoraCrit(strat); /*set Gebauer, honey, sugarCrit, NO CHANGES */ |
---|
| 1424 | initBuchMoraPos(strat); /*NO CHANGES YET: perhaps later*/ |
---|
| 1425 | initHilbCrit(F,Q,&hilb,strat); /*NO CHANGES*/ |
---|
| 1426 | initBbaShift(F,strat); /* DONE */ |
---|
[cb0fbe] | 1427 | /*set enterS, spSpolyShort, reduce, red, initEcart, initEcartPair*/ |
---|
[37a4c3] | 1428 | /*Shdl=*/initBuchMoraShift(F, Q,strat); /* updateS with no toT, i.e. no init for T */ |
---|
| 1429 | updateSShift(strat,uptodeg,lV); /* initializes T */ |
---|
| 1430 | |
---|
[cb0fbe] | 1431 | if (strat->minim>0) strat->M=idInit(IDELEMS(F),F->rank); |
---|
| 1432 | srmax = strat->sl; |
---|
| 1433 | reduc = olddeg = lrmax = 0; |
---|
[bbf50e] | 1434 | strat->lV=lV; |
---|
[cb0fbe] | 1435 | |
---|
| 1436 | #ifndef NO_BUCKETS |
---|
| 1437 | if (!TEST_OPT_NOT_BUCKETS) |
---|
| 1438 | strat->use_buckets = 1; |
---|
| 1439 | #endif |
---|
| 1440 | |
---|
| 1441 | // redtailBBa against T for inhomogenous input |
---|
[228b631] | 1442 | // if (!TEST_OPT_OLDSTD) |
---|
[37a4c3] | 1443 | // withT = ! strat->homog; |
---|
[cb0fbe] | 1444 | |
---|
| 1445 | // strat->posInT = posInT_pLength; |
---|
| 1446 | kTest_TS(strat); |
---|
| 1447 | |
---|
| 1448 | #ifdef HAVE_TAIL_RING |
---|
| 1449 | kStratInitChangeTailRing(strat); |
---|
| 1450 | #endif |
---|
| 1451 | |
---|
| 1452 | /* compute------------------------------------------------------- */ |
---|
| 1453 | while (strat->Ll >= 0) |
---|
| 1454 | { |
---|
| 1455 | if (strat->Ll > lrmax) lrmax =strat->Ll;/*stat.*/ |
---|
| 1456 | #ifdef KDEBUG |
---|
| 1457 | loop_count++; |
---|
| 1458 | if (TEST_OPT_DEBUG) messageSets(strat); |
---|
| 1459 | #endif |
---|
| 1460 | if (strat->Ll== 0) strat->interpt=TRUE; |
---|
| 1461 | if (TEST_OPT_DEGBOUND |
---|
| 1462 | && ((strat->honey && (strat->L[strat->Ll].ecart+pFDeg(strat->L[strat->Ll].p,currRing)>Kstd1_deg)) |
---|
| 1463 | || ((!strat->honey) && (pFDeg(strat->L[strat->Ll].p,currRing)>Kstd1_deg)))) |
---|
| 1464 | { |
---|
| 1465 | /* |
---|
| 1466 | *stops computation if |
---|
| 1467 | * 24 IN test and the degree +ecart of L[strat->Ll] is bigger then |
---|
| 1468 | *a predefined number Kstd1_deg |
---|
| 1469 | */ |
---|
| 1470 | while ((strat->Ll >= 0) |
---|
| 1471 | && (strat->L[strat->Ll].p1!=NULL) && (strat->L[strat->Ll].p2!=NULL) |
---|
| 1472 | && ((strat->honey && (strat->L[strat->Ll].ecart+pFDeg(strat->L[strat->Ll].p,currRing)>Kstd1_deg)) |
---|
| 1473 | || ((!strat->honey) && (pFDeg(strat->L[strat->Ll].p,currRing)>Kstd1_deg))) |
---|
| 1474 | ) |
---|
| 1475 | deleteInL(strat->L,&strat->Ll,strat->Ll,strat); |
---|
| 1476 | if (strat->Ll<0) break; |
---|
| 1477 | else strat->noClearS=TRUE; |
---|
| 1478 | } |
---|
| 1479 | /* picks the last element from the lazyset L */ |
---|
| 1480 | strat->P = strat->L[strat->Ll]; |
---|
| 1481 | strat->Ll--; |
---|
| 1482 | |
---|
| 1483 | if (pNext(strat->P.p) == strat->tail) |
---|
| 1484 | { |
---|
| 1485 | // deletes the short spoly |
---|
| 1486 | pLmFree(strat->P.p); |
---|
| 1487 | strat->P.p = NULL; |
---|
| 1488 | poly m1 = NULL, m2 = NULL; |
---|
| 1489 | |
---|
| 1490 | // check that spoly creation is ok |
---|
| 1491 | while (strat->tailRing != currRing && |
---|
| 1492 | !kCheckSpolyCreation(&(strat->P), strat, m1, m2)) |
---|
| 1493 | { |
---|
| 1494 | assume(m1 == NULL && m2 == NULL); |
---|
| 1495 | // if not, change to a ring where exponents are at least |
---|
| 1496 | // large enough |
---|
| 1497 | kStratChangeTailRing(strat); |
---|
| 1498 | } |
---|
| 1499 | // create the real one |
---|
| 1500 | ksCreateSpoly(&(strat->P), NULL, strat->use_buckets, |
---|
| 1501 | strat->tailRing, m1, m2, strat->R); |
---|
| 1502 | } |
---|
| 1503 | else if (strat->P.p1 == NULL) |
---|
| 1504 | { |
---|
| 1505 | if (strat->minim > 0) |
---|
| 1506 | strat->P.p2=p_Copy(strat->P.p, currRing, strat->tailRing); |
---|
| 1507 | // for input polys, prepare reduction |
---|
| 1508 | strat->P.PrepareRed(strat->use_buckets); |
---|
| 1509 | } |
---|
| 1510 | |
---|
[ad1c3b] | 1511 | poly qq; |
---|
| 1512 | |
---|
| 1513 | /* here in the nonhomog case we shrink the new spoly */ |
---|
[eed827] | 1514 | |
---|
[ad1c3b] | 1515 | if ( ! strat->homog) |
---|
| 1516 | { |
---|
| 1517 | strat->P.GetP(strat->lmBin); // because shifts are counted with .p structure |
---|
| 1518 | /* in the nonhomog case we have to shrink the polynomial */ |
---|
| 1519 | assume(strat->P.t_p!=NULL); |
---|
| 1520 | qq = p_Shrink(strat->P.t_p, lV, strat->tailRing); // direct shrink |
---|
| 1521 | if (qq != NULL) |
---|
| 1522 | { |
---|
| 1523 | /* we're here if Shrink is nonzero */ |
---|
| 1524 | // strat->P.p = NULL; |
---|
[eed827] | 1525 | // strat->P.Delete(); /* deletes P.p and P.t_p */ //error |
---|
[ad1c3b] | 1526 | strat->P.p = NULL; // is not set by Delete |
---|
| 1527 | strat->P.t_p = qq; |
---|
| 1528 | strat->P.GetP(strat->lmBin); |
---|
| 1529 | // update sev and length |
---|
| 1530 | strat->initEcart(&(strat->P)); |
---|
| 1531 | strat->P.sev = pGetShortExpVector(strat->P.p); |
---|
| 1532 | // strat->P.FDeg = strat->P.pFDeg(); |
---|
| 1533 | // strat->P.length = strat->P.pLDeg(); |
---|
| 1534 | // strat->P.pLength =strat->P.GetpLength(); //pLength(strat->P.p); |
---|
| 1535 | } |
---|
| 1536 | else |
---|
| 1537 | { |
---|
| 1538 | /* Shrink is zero, like y(1)*y(2) - y(1)*y(3)*/ |
---|
| 1539 | #ifdef KDEBUG |
---|
| 1540 | if (TEST_OPT_DEBUG){PrintS("nonzero s shrinks to 0");PrintLn();} |
---|
| 1541 | #endif |
---|
[eed827] | 1542 | // strat->P.Delete(); // cause error |
---|
| 1543 | strat->P.p = NULL; |
---|
| 1544 | strat->P.t_p = NULL; |
---|
[ad1c3b] | 1545 | // strat->P.p = NULL; // or delete strat->P.p ? |
---|
| 1546 | } |
---|
| 1547 | } |
---|
| 1548 | /* end shrinking poly in the nonhomog case */ |
---|
| 1549 | |
---|
[cb0fbe] | 1550 | if (strat->P.p == NULL && strat->P.t_p == NULL) |
---|
| 1551 | { |
---|
| 1552 | red_result = 0; |
---|
| 1553 | } |
---|
| 1554 | else |
---|
| 1555 | { |
---|
| 1556 | if (TEST_OPT_PROT) |
---|
| 1557 | message((strat->honey ? strat->P.ecart : 0) + strat->P.pFDeg(), |
---|
| 1558 | &olddeg,&reduc,strat, red_result); |
---|
| 1559 | |
---|
| 1560 | /* reduction of the element choosen from L */ |
---|
| 1561 | red_result = strat->red(&strat->P,strat); |
---|
| 1562 | } |
---|
| 1563 | |
---|
| 1564 | // reduction to non-zero new poly |
---|
| 1565 | if (red_result == 1) |
---|
| 1566 | { |
---|
| 1567 | /* statistic */ |
---|
| 1568 | if (TEST_OPT_PROT) PrintS("s"); |
---|
| 1569 | |
---|
| 1570 | // get the polynomial (canonicalize bucket, make sure P.p is set) |
---|
| 1571 | strat->P.GetP(strat->lmBin); |
---|
| 1572 | |
---|
| 1573 | int pos=posInS(strat,strat->sl,strat->P.p,strat->P.ecart); |
---|
| 1574 | |
---|
| 1575 | // reduce the tail and normalize poly |
---|
| 1576 | if (TEST_OPT_INTSTRATEGY) |
---|
| 1577 | { |
---|
| 1578 | strat->P.pCleardenom(); |
---|
| 1579 | if ((TEST_OPT_REDSB)||(TEST_OPT_REDTAIL)) |
---|
| 1580 | { |
---|
| 1581 | strat->P.p = redtailBba(&(strat->P),pos-1,strat, withT); |
---|
| 1582 | strat->P.pCleardenom(); |
---|
| 1583 | } |
---|
| 1584 | } |
---|
| 1585 | else |
---|
| 1586 | { |
---|
| 1587 | strat->P.pNorm(); |
---|
| 1588 | if ((TEST_OPT_REDSB)||(TEST_OPT_REDTAIL)) |
---|
| 1589 | strat->P.p = redtailBba(&(strat->P),pos-1,strat, withT); |
---|
| 1590 | } |
---|
| 1591 | |
---|
[ad1c3b] | 1592 | // here we must shrink again! and optionally reduce again |
---|
| 1593 | // or build shrink into redtailBba! |
---|
| 1594 | |
---|
[cb0fbe] | 1595 | #ifdef KDEBUG |
---|
| 1596 | if (TEST_OPT_DEBUG){PrintS("new s:");strat->P.wrp();PrintLn();} |
---|
| 1597 | #endif |
---|
| 1598 | |
---|
| 1599 | // min_std stuff |
---|
| 1600 | if ((strat->P.p1==NULL) && (strat->minim>0)) |
---|
| 1601 | { |
---|
| 1602 | if (strat->minim==1) |
---|
| 1603 | { |
---|
| 1604 | strat->M->m[minimcnt]=p_Copy(strat->P.p,currRing,strat->tailRing); |
---|
| 1605 | p_Delete(&strat->P.p2, currRing, strat->tailRing); |
---|
| 1606 | } |
---|
| 1607 | else |
---|
| 1608 | { |
---|
| 1609 | strat->M->m[minimcnt]=strat->P.p2; |
---|
| 1610 | strat->P.p2=NULL; |
---|
| 1611 | } |
---|
| 1612 | if (strat->tailRing!=currRing && pNext(strat->M->m[minimcnt])!=NULL) |
---|
| 1613 | pNext(strat->M->m[minimcnt]) |
---|
| 1614 | = strat->p_shallow_copy_delete(pNext(strat->M->m[minimcnt]), |
---|
| 1615 | strat->tailRing, currRing, |
---|
| 1616 | currRing->PolyBin); |
---|
| 1617 | minimcnt++; |
---|
| 1618 | } |
---|
| 1619 | |
---|
[ad1c3b] | 1620 | /* here in the nonhomog case we shrink the reduced poly AGAIN */ |
---|
[eed827] | 1621 | |
---|
[ad1c3b] | 1622 | if ( ! strat->homog) |
---|
| 1623 | { |
---|
| 1624 | strat->P.GetP(strat->lmBin); // because shifts are counted with .p structure |
---|
| 1625 | /* assume strat->P.t_p != NULL */ |
---|
| 1626 | /* in the nonhomog case we have to shrink the polynomial */ |
---|
| 1627 | assume(strat->P.t_p!=NULL); // poly qq defined above |
---|
| 1628 | qq = p_Shrink(strat->P.t_p, lV, strat->tailRing); // direct shrink |
---|
| 1629 | if (qq != NULL) |
---|
| 1630 | { |
---|
| 1631 | /* we're here if Shrink is nonzero */ |
---|
| 1632 | // strat->P.p = NULL; |
---|
[eed827] | 1633 | // strat->P.Delete(); /* deletes P.p and P.t_p */ //error |
---|
[ad1c3b] | 1634 | strat->P.p = NULL; // is not set by Delete |
---|
| 1635 | strat->P.t_p = qq; |
---|
| 1636 | strat->P.GetP(strat->lmBin); |
---|
| 1637 | // update sev and length |
---|
| 1638 | strat->initEcart(&(strat->P)); |
---|
| 1639 | strat->P.sev = pGetShortExpVector(strat->P.p); |
---|
| 1640 | } |
---|
| 1641 | else |
---|
| 1642 | { |
---|
| 1643 | /* Shrink is zero, like y(1)*y(2) - y(1)*y(3)*/ |
---|
| 1644 | #ifdef PDEBUG |
---|
| 1645 | if (TEST_OPT_DEBUG){PrintS("nonzero s shrinks to 0");PrintLn();} |
---|
| 1646 | #endif |
---|
[eed827] | 1647 | // strat->P.Delete(); // cause error |
---|
| 1648 | strat->P.p = NULL; |
---|
| 1649 | strat->P.t_p = NULL; |
---|
[ad1c3b] | 1650 | // strat->P.p = NULL; // or delete strat->P.p ? |
---|
[eed827] | 1651 | goto red_shrink2zero; |
---|
[ad1c3b] | 1652 | } |
---|
| 1653 | } |
---|
| 1654 | /* end shrinking poly AGAIN in the nonhomog case */ |
---|
| 1655 | |
---|
| 1656 | |
---|
[cb0fbe] | 1657 | // enter into S, L, and T |
---|
| 1658 | //if ((!TEST_OPT_IDLIFT) || (pGetComp(strat->P.p) <= strat->syzComp)) |
---|
[37a4c3] | 1659 | // enterT(strat->P, strat); // this was here before Shift stuff |
---|
| 1660 | //enterTShift(LObject p, kStrategy strat, int atT, int uptodeg, int lV); // syntax |
---|
[4d2ab5c] | 1661 | // the default value for atT = -1 as in bba |
---|
[eed827] | 1662 | /* strat->P.GetP(); */ |
---|
[ad1c3b] | 1663 | // because shifts are counted with .p structure // done before, but ? |
---|
[37a4c3] | 1664 | enterTShift(strat->P,strat,-1,uptodeg, lV); |
---|
| 1665 | enterpairsShift(strat->P.p,strat->sl,strat->P.ecart,pos,strat, strat->tl,uptodeg,lV); |
---|
[4d2ab5c] | 1666 | // enterpairsShift(vw,strat->sl,strat->P.ecart,pos,strat, strat->tl,uptodeg,lV); |
---|
[cb0fbe] | 1667 | // posInS only depends on the leading term |
---|
[1c35568] | 1668 | strat->enterS(strat->P, pos, strat, strat->tl); |
---|
[ad1c3b] | 1669 | |
---|
[cb0fbe] | 1670 | if (hilb!=NULL) khCheck(Q,w,hilb,hilbeledeg,hilbcount,strat); |
---|
| 1671 | // Print("[%d]",hilbeledeg); |
---|
| 1672 | if (strat->P.lcm!=NULL) pLmFree(strat->P.lcm); |
---|
| 1673 | if (strat->sl>srmax) srmax = strat->sl; |
---|
| 1674 | } |
---|
[eed827] | 1675 | else |
---|
[cb0fbe] | 1676 | { |
---|
[ad1c3b] | 1677 | red_shrink2zero: |
---|
| 1678 | if (strat->P.p1 == NULL && strat->minim > 0) |
---|
| 1679 | { |
---|
[eed827] | 1680 | p_Delete(&strat->P.p2, currRing, strat->tailRing); |
---|
[ad1c3b] | 1681 | } |
---|
[cb0fbe] | 1682 | } |
---|
| 1683 | #ifdef KDEBUG |
---|
| 1684 | memset(&(strat->P), 0, sizeof(strat->P)); |
---|
| 1685 | #endif |
---|
| 1686 | kTest_TS(strat); |
---|
| 1687 | } |
---|
| 1688 | #ifdef KDEBUG |
---|
| 1689 | if (TEST_OPT_DEBUG) messageSets(strat); |
---|
| 1690 | #endif |
---|
| 1691 | /* complete reduction of the standard basis--------- */ |
---|
[d5564f8] | 1692 | /* shift case: look for elt's in S such that they are divisible by elt in T */ |
---|
[4c4979] | 1693 | // if (TEST_OPT_SB_1) |
---|
| 1694 | if (TEST_OPT_REDSB) |
---|
[cb0fbe] | 1695 | { |
---|
[4c4979] | 1696 | int k=0; |
---|
| 1697 | int j=-1; |
---|
[cb0fbe] | 1698 | while(k<=strat->sl) |
---|
| 1699 | { |
---|
[4c4979] | 1700 | // loop |
---|
| 1701 | // { |
---|
| 1702 | // if (j>=k) break; |
---|
| 1703 | // clearS(strat->S[j],strat->sevS[j],&k,&j,strat); |
---|
| 1704 | // j++; |
---|
| 1705 | // } |
---|
| 1706 | LObject Ln (strat->S[k],currRing, strat->tailRing); |
---|
| 1707 | Ln.SetShortExpVector(); |
---|
| 1708 | j = kFindDivisibleByInT(strat->T, strat->sevT, strat->tl, &Ln, j+1); |
---|
| 1709 | if (j<0) { k++; j=-1;} |
---|
| 1710 | else |
---|
[cb0fbe] | 1711 | { |
---|
[4c4979] | 1712 | if ( pLmCmp(strat->S[k],strat->T[j].p) == 0) |
---|
| 1713 | { |
---|
| 1714 | j = kFindDivisibleByInT(strat->T, strat->sevT, strat->tl, &Ln, j+1); |
---|
| 1715 | if (j<0) { k++; j=-1;} |
---|
| 1716 | else |
---|
| 1717 | { |
---|
| 1718 | deleteInS(k,strat); |
---|
| 1719 | } |
---|
| 1720 | } |
---|
| 1721 | else |
---|
| 1722 | { |
---|
| 1723 | deleteInS(k,strat); |
---|
| 1724 | } |
---|
[cb0fbe] | 1725 | } |
---|
| 1726 | } |
---|
| 1727 | } |
---|
| 1728 | |
---|
| 1729 | if (TEST_OPT_REDSB) |
---|
[4c4979] | 1730 | { completeReduce(strat, TRUE); //shift: withT = TRUE |
---|
[cb0fbe] | 1731 | if (strat->completeReduce_retry) |
---|
| 1732 | { |
---|
| 1733 | // completeReduce needed larger exponents, retry |
---|
| 1734 | // to reduce with S (instead of T) |
---|
| 1735 | // and in currRing (instead of strat->tailRing) |
---|
| 1736 | cleanT(strat);strat->tailRing=currRing; |
---|
| 1737 | int i; |
---|
| 1738 | for(i=strat->sl;i>=0;i--) strat->S_2_R[i]=-1; |
---|
[4d43ff] | 1739 | completeReduce(strat, TRUE); |
---|
[cb0fbe] | 1740 | } |
---|
| 1741 | } |
---|
[5accf0] | 1742 | else if (TEST_OPT_PROT) PrintLn(); |
---|
[cb0fbe] | 1743 | |
---|
| 1744 | /* release temp data-------------------------------- */ |
---|
| 1745 | exitBuchMora(strat); |
---|
| 1746 | if (TEST_OPT_WEIGHTM) |
---|
| 1747 | { |
---|
| 1748 | pRestoreDegProcs(pFDegOld, pLDegOld); |
---|
| 1749 | if (ecartWeights) |
---|
| 1750 | { |
---|
| 1751 | omFreeSize((ADDRESS)ecartWeights,(pVariables+1)*sizeof(short)); |
---|
| 1752 | ecartWeights=NULL; |
---|
| 1753 | } |
---|
| 1754 | } |
---|
| 1755 | if (TEST_OPT_PROT) messageStat(srmax,lrmax,hilbcount,strat); |
---|
| 1756 | if (Q!=NULL) updateResult(strat->Shdl,Q,strat); |
---|
| 1757 | return (strat->Shdl); |
---|
| 1758 | } |
---|
| 1759 | |
---|
[1c473f] | 1760 | |
---|
[cb0fbe] | 1761 | ideal freegb(ideal I, int uptodeg, int lVblock) |
---|
| 1762 | { |
---|
| 1763 | /* todo main call */ |
---|
| 1764 | |
---|
[37a4c3] | 1765 | /* assume: ring is prepared, ideal is copied into shifted ring */ |
---|
| 1766 | /* uptodeg and lVblock are correct - test them! */ |
---|
| 1767 | |
---|
[dabe365] | 1768 | /* check whether the ideal is in V */ |
---|
[9f5fca] | 1769 | |
---|
[db0c264] | 1770 | // if (0) |
---|
| 1771 | if (! ideal_isInV(I,lVblock) ) |
---|
[dabe365] | 1772 | { |
---|
[9f5fca] | 1773 | WerrorS("The input ideal contains incorrectly encoded elements! "); |
---|
[dabe365] | 1774 | return(NULL); |
---|
| 1775 | } |
---|
| 1776 | |
---|
[1c473f] | 1777 | // kStrategy strat = new skStrategy; |
---|
[cb0fbe] | 1778 | /* ideal bbaShift(ideal F, ideal Q,intvec *w,intvec *hilb,kStrategy strat, int uptodeg, int lV) */ |
---|
| 1779 | /* at the moment: |
---|
| 1780 | - no quotient (check) |
---|
| 1781 | - no *w, no *hilb |
---|
| 1782 | */ |
---|
[1c473f] | 1783 | /* ideal F, ideal Q, tHomog h,intvec ** w, intvec *hilb,int syzComp, |
---|
| 1784 | int newIdeal, intvec *vw) */ |
---|
| 1785 | ideal RS = kStdShift(I,NULL, testHomog, NULL,NULL,0,0,NULL, uptodeg, lVblock); |
---|
| 1786 | //bbaShift(I,NULL, NULL, NULL, strat, uptodeg, lVblock); |
---|
[4d2ab5c] | 1787 | idSkipZeroes(RS); |
---|
[cb0fbe] | 1788 | return(RS); |
---|
| 1789 | } |
---|
[37a4c3] | 1790 | |
---|
| 1791 | /*2 |
---|
| 1792 | *reduces h with elements from T choosing the first possible |
---|
| 1793 | * element in t with respect to the given pDivisibleBy |
---|
| 1794 | */ |
---|
| 1795 | int redFirstShift (LObject* h,kStrategy strat) |
---|
| 1796 | { |
---|
| 1797 | if (h->IsNull()) return 0; |
---|
| 1798 | |
---|
| 1799 | int at, reddeg,d; |
---|
| 1800 | int pass = 0; |
---|
| 1801 | int j = 0; |
---|
| 1802 | |
---|
| 1803 | if (! strat->homog) |
---|
| 1804 | { |
---|
| 1805 | d = h->GetpFDeg() + h->ecart; |
---|
| 1806 | reddeg = strat->LazyDegree+d; |
---|
| 1807 | } |
---|
| 1808 | h->SetShortExpVector(); |
---|
| 1809 | loop |
---|
| 1810 | { |
---|
| 1811 | j = kFindDivisibleByInT(strat->T, strat->sevT, strat->tl, h); |
---|
| 1812 | if (j < 0) |
---|
| 1813 | { |
---|
| 1814 | h->SetDegStuffReturnLDeg(strat->LDegLast); |
---|
| 1815 | return 1; |
---|
| 1816 | } |
---|
| 1817 | |
---|
| 1818 | if (!TEST_OPT_INTSTRATEGY) |
---|
| 1819 | strat->T[j].pNorm(); |
---|
| 1820 | #ifdef KDEBUG |
---|
| 1821 | if (TEST_OPT_DEBUG) |
---|
| 1822 | { |
---|
| 1823 | PrintS("reduce "); |
---|
| 1824 | h->wrp(); |
---|
| 1825 | PrintS(" with "); |
---|
| 1826 | strat->T[j].wrp(); |
---|
| 1827 | } |
---|
| 1828 | #endif |
---|
| 1829 | ksReducePoly(h, &(strat->T[j]), strat->kNoetherTail(), NULL, strat); |
---|
[0724284] | 1830 | if (!h->IsNull()) |
---|
| 1831 | { |
---|
| 1832 | poly qq=p_Shrink(h->GetTP(),strat->lV,strat->tailRing); |
---|
| 1833 | h->p=NULL; |
---|
| 1834 | h->t_p=qq; |
---|
| 1835 | if (qq!=NULL) h->GetP(strat->lmBin); |
---|
| 1836 | } |
---|
[d5564f8] | 1837 | |
---|
[37a4c3] | 1838 | #ifdef KDEBUG |
---|
| 1839 | if (TEST_OPT_DEBUG) |
---|
| 1840 | { |
---|
| 1841 | PrintS(" to "); |
---|
| 1842 | wrp(h->p); |
---|
| 1843 | PrintLn(); |
---|
| 1844 | } |
---|
| 1845 | #endif |
---|
| 1846 | if (h->IsNull()) |
---|
| 1847 | { |
---|
| 1848 | if (h->lcm!=NULL) pLmFree(h->lcm); |
---|
| 1849 | h->Clear(); |
---|
| 1850 | return 0; |
---|
| 1851 | } |
---|
| 1852 | h->SetShortExpVector(); |
---|
| 1853 | |
---|
| 1854 | #if 0 |
---|
| 1855 | if ((strat->syzComp!=0) && !strat->honey) |
---|
| 1856 | { |
---|
| 1857 | if ((strat->syzComp>0) && |
---|
| 1858 | (h->Comp() > strat->syzComp)) |
---|
| 1859 | { |
---|
| 1860 | assume(h->MinComp() > strat->syzComp); |
---|
| 1861 | #ifdef KDEBUG |
---|
| 1862 | if (TEST_OPT_DEBUG) PrintS(" > syzComp\n"); |
---|
| 1863 | #endif |
---|
| 1864 | if (strat->homog) |
---|
| 1865 | h->SetDegStuffReturnLDeg(strat->LDegLast); |
---|
| 1866 | return -2; |
---|
| 1867 | } |
---|
| 1868 | } |
---|
| 1869 | #endif |
---|
| 1870 | if (!strat->homog) |
---|
| 1871 | { |
---|
[228b631] | 1872 | if (!TEST_OPT_OLDSTD && strat->honey) |
---|
[37a4c3] | 1873 | { |
---|
| 1874 | h->SetpFDeg(); |
---|
| 1875 | if (strat->T[j].ecart <= h->ecart) |
---|
| 1876 | h->ecart = d - h->GetpFDeg(); |
---|
| 1877 | else |
---|
| 1878 | h->ecart = d - h->GetpFDeg() + strat->T[j].ecart - h->ecart; |
---|
| 1879 | |
---|
| 1880 | d = h->GetpFDeg() + h->ecart; |
---|
| 1881 | } |
---|
| 1882 | else |
---|
| 1883 | d = h->SetDegStuffReturnLDeg(strat->LDegLast); |
---|
| 1884 | /*- try to reduce the s-polynomial -*/ |
---|
| 1885 | pass++; |
---|
| 1886 | /* |
---|
| 1887 | *test whether the polynomial should go to the lazyset L |
---|
| 1888 | *-if the degree jumps |
---|
| 1889 | *-if the number of pre-defined reductions jumps |
---|
| 1890 | */ |
---|
[228b631] | 1891 | if (!TEST_OPT_REDTHROUGH && (strat->Ll >= 0) |
---|
[37a4c3] | 1892 | && ((d >= reddeg) || (pass > strat->LazyPass))) |
---|
| 1893 | { |
---|
| 1894 | h->SetLmCurrRing(); |
---|
| 1895 | if (strat->posInLDependsOnLength) |
---|
| 1896 | h->SetLength(strat->length_pLength); |
---|
| 1897 | at = strat->posInL(strat->L,strat->Ll,h,strat); |
---|
| 1898 | if (at <= strat->Ll) |
---|
| 1899 | { |
---|
| 1900 | int dummy=strat->sl; |
---|
[eed827] | 1901 | /* if (kFindDivisibleByInS(strat,&dummy, h) < 0) */ |
---|
[37a4c3] | 1902 | if (kFindDivisibleByInT(strat->T,strat->sevT, dummy, h) < 0) |
---|
| 1903 | return 1; |
---|
| 1904 | enterL(&strat->L,&strat->Ll,&strat->Lmax,*h,at); |
---|
| 1905 | #ifdef KDEBUG |
---|
| 1906 | if (TEST_OPT_DEBUG) Print(" degree jumped; ->L%d\n",at); |
---|
[07625cb] | 1907 | #endif |
---|
[37a4c3] | 1908 | h->Clear(); |
---|
| 1909 | return -1; |
---|
| 1910 | } |
---|
| 1911 | } |
---|
| 1912 | if ((TEST_OPT_PROT) && (strat->Ll < 0) && (d >= reddeg)) |
---|
| 1913 | { |
---|
| 1914 | reddeg = d+1; |
---|
| 1915 | Print(".%d",d);mflush(); |
---|
| 1916 | } |
---|
| 1917 | } |
---|
| 1918 | } |
---|
| 1919 | } |
---|
| 1920 | |
---|
| 1921 | void initBbaShift(ideal F,kStrategy strat) |
---|
| 1922 | { |
---|
| 1923 | int i; |
---|
| 1924 | idhdl h; |
---|
| 1925 | /* setting global variables ------------------- */ |
---|
| 1926 | strat->enterS = enterSBba; /* remains as is, we change enterT! */ |
---|
| 1927 | |
---|
| 1928 | strat->red = redFirstShift; /* no redHomog ! */ |
---|
| 1929 | |
---|
| 1930 | if (pLexOrder && strat->honey) |
---|
| 1931 | strat->initEcart = initEcartNormal; |
---|
| 1932 | else |
---|
| 1933 | strat->initEcart = initEcartBBA; |
---|
| 1934 | if (strat->honey) |
---|
| 1935 | strat->initEcartPair = initEcartPairMora; |
---|
| 1936 | else |
---|
| 1937 | strat->initEcartPair = initEcartPairBba; |
---|
| 1938 | strat->kIdeal = NULL; |
---|
| 1939 | //if (strat->ak==0) strat->kIdeal->rtyp=IDEAL_CMD; |
---|
| 1940 | //else strat->kIdeal->rtyp=MODUL_CMD; |
---|
| 1941 | //strat->kIdeal->data=(void *)strat->Shdl; |
---|
| 1942 | if ((TEST_OPT_WEIGHTM)&&(F!=NULL)) |
---|
| 1943 | { |
---|
| 1944 | //interred machen Aenderung |
---|
| 1945 | pFDegOld=pFDeg; |
---|
| 1946 | pLDegOld=pLDeg; |
---|
| 1947 | //h=ggetid("ecart"); |
---|
| 1948 | //if ((h!=NULL) /*&& (IDTYP(h)==INTVEC_CMD)*/) |
---|
| 1949 | //{ |
---|
| 1950 | // ecartWeights=iv2array(IDINTVEC(h)); |
---|
| 1951 | //} |
---|
| 1952 | //else |
---|
| 1953 | { |
---|
| 1954 | ecartWeights=(short *)omAlloc((pVariables+1)*sizeof(short)); |
---|
| 1955 | /*uses automatic computation of the ecartWeights to set them*/ |
---|
| 1956 | kEcartWeights(F->m,IDELEMS(F)-1,ecartWeights); |
---|
| 1957 | } |
---|
| 1958 | pRestoreDegProcs(totaldegreeWecart, maxdegreeWecart); |
---|
| 1959 | if (TEST_OPT_PROT) |
---|
| 1960 | { |
---|
| 1961 | for(i=1; i<=pVariables; i++) |
---|
| 1962 | Print(" %d",ecartWeights[i]); |
---|
| 1963 | PrintLn(); |
---|
| 1964 | mflush(); |
---|
| 1965 | } |
---|
| 1966 | } |
---|
| 1967 | } |
---|
[037df4] | 1968 | #endif |
---|