version 1.1.1.1, 1999/10/08 02:12:02 |
version 1.5, 2001/05/04 01:06:23 |
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/* $OpenXM: OpenXM/src/kan96xx/Kan/gb.c,v 1.4 2000/03/15 01:31:17 takayama Exp $ */ |
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/* untabify on May 4, 2001 */ |
#include <stdio.h> |
#include <stdio.h> |
#include "datatype.h" |
#include "datatype.h" |
#include "extern2.h" |
#include "extern2.h" |
Line 11 int KanGBmessage = 1; |
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Line 13 int KanGBmessage = 1; |
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static int Debug = 0; |
static int Debug = 0; |
static int sugarGrade(struct pair *inode,struct gradedPolySet *grG, |
static int sugarGrade(struct pair *inode,struct gradedPolySet *grG, |
POLY gt,int gtSugarGrade); |
POLY gt,int gtSugarGrade); |
extern int Sugar; |
extern int Sugar; |
extern int Statistics; |
extern int Statistics; |
extern int Criterion1; |
extern int Criterion1; |
Line 19 extern int UseCriterion1; |
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Line 21 extern int UseCriterion1; |
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extern int UseCriterion2B; |
extern int UseCriterion2B; |
extern int Spairs; |
extern int Spairs; |
extern int Criterion2B, Criterion2F, Criterion2M; |
extern int Criterion2B, Criterion2F, Criterion2M; |
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extern int AutoReduce; |
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struct gradedPairs *updatePairs(grD,gt,gtGrade,t,grG) |
struct gradedPairs *updatePairs(grD,gt,gtGrade,t,grG) |
struct gradedPairs *grD; /* set of pairs */ |
struct gradedPairs *grD; /* set of pairs */ |
POLY gt; /* new polynomial */ |
POLY gt; /* new polynomial */ |
int gtGrade; |
int gtGrade; |
int t; |
int t; |
struct gradedPolySet *grG; /* (f,gt), f \in grG, should be added to grD. */ |
struct gradedPolySet *grG; /* (f,gt), f \in grG, should be added to grD. */ |
{ |
{ |
int gmax,newGrade; |
int gmax,newGrade; |
struct pair *node,*new,*inode,*jnode; |
struct pair *node,*new,*inode,*jnode; |
Line 48 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
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Line 51 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
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g = grG->polys[k]; |
g = grG->polys[k]; |
for (i=0; i<g->size; i++) { |
for (i=0; i<g->size; i++) { |
if (g->del[i] == 0 && (gtGrade != k || t != i)) { |
if (g->del[i] == 0 && (gtGrade != k || t != i)) { |
lcmp = (*lcm)(g->g[i],gt); |
lcmp = (*lcm)(g->g[i],gt); |
if (lcmp == ZERO) { |
if (lcmp == ZERO) { |
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}else { |
}else { |
new->del = 0; |
new->del = 0; |
new->next = newPair(new); |
new->next = newPair(new); |
new = new->next; |
new = new->next; |
new->lcm = lcmp; |
new->lcm = lcmp; |
new->ig = k; new->ii = i; /* g->g[i] */ |
new->ig = k; new->ii = i; /* g->g[i] */ |
new->jg = gtGrade; new->ji = t; /* gt */ |
new->jg = gtGrade; new->ji = t; /* gt */ |
new->grade = -1; /* one do not need to set grade here. */ |
new->grade = -1; /* one do not need to set grade here. */ |
} |
} |
} |
} |
} |
} |
} |
} |
Line 69 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
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Line 72 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
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/* See Gebauer and Mora, 1988, Journal of Symbolic Computation |
/* See Gebauer and Mora, 1988, Journal of Symbolic Computation |
279. We must not use the test T(i)T(j) = T(i,j) because it |
279. We must not use the test T(i)T(j) = T(i,j) because it |
does not hold in the ring of diff op. |
does not hold in the ring of diff op. |
*/ |
*/ |
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inode = node->next; |
inode = node->next; |
while (inode != (struct pair *)NULL) { |
while (inode != (struct pair *)NULL) { |
Line 78 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
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Line 81 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
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it = inode->lcm; |
it = inode->lcm; |
jt = jnode->lcm; |
jt = jnode->lcm; |
if ((*mmLarger)(it,jt) == 2) { |
if ((*mmLarger)(it,jt) == 2) { |
/* F(j,t), i<j */ |
/* F(j,t), i<j */ |
jnode->del = 1; |
jnode->del = 1; |
if (Verbose) printf("F[%d,%d]([%d,%d],[%d,%d]) ", |
if (Verbose) printf("F[%d,%d]([%d,%d],[%d,%d]) ", |
inode->ig,inode->ii, |
inode->ig,inode->ii, |
jnode->ig,jnode->ii, |
jnode->ig,jnode->ii, |
gtGrade,t); |
gtGrade,t); |
Criterion2F++; |
Criterion2F++; |
}else { |
}else { |
/* g[i] > g[j] ?, M(i,t) */ |
/* g[i] > g[j] ?, M(i,t) */ |
if ((*isReducible)(it,jt)) { |
if ((*isReducible)(it,jt)) { |
inode->del = 1; |
inode->del = 1; |
if (Verbose) printf("M[%d,%d]([%d,%d],[%d,%d]) ", |
if (Verbose) printf("M[%d,%d]([%d,%d],[%d,%d]) ", |
jnode->ig,jnode->ii, |
jnode->ig,jnode->ii, |
inode->ig,inode->ii, |
inode->ig,inode->ii, |
gtGrade,t); |
gtGrade,t); |
Criterion2M++; |
Criterion2M++; |
} |
} |
/* M(j,t) */ |
/* M(j,t) */ |
if ((*isReducible)(jt,it)) { |
if ((*isReducible)(jt,it)) { |
jnode->del = 1; |
jnode->del = 1; |
if (Verbose) printf("M[%d,%d]([%d,%d],[%d,%d]) ", |
if (Verbose) printf("M[%d,%d]([%d,%d],[%d,%d]) ", |
inode->ig,inode->ii, |
inode->ig,inode->ii, |
jnode->ig,jnode->ii, |
jnode->ig,jnode->ii, |
gtGrade,t); |
gtGrade,t); |
Criterion2M++; |
Criterion2M++; |
} |
} |
} |
} |
jnode = jnode->next; |
jnode = jnode->next; |
} |
} |
inode = inode->next; |
inode = inode->next; |
} |
} |
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if (UseCriterion1) { |
if (UseCriterion1) { |
inode = node->next; |
inode = node->next; |
while (inode != NULL) { |
while (inode != NULL) { |
if (inode->del == 0) { |
if (inode->del == 0) { |
if (criterion1(gt,grG->polys[inode->ig]->g[inode->ii],inode->lcm)) { |
if (criterion1(gt,grG->polys[inode->ig]->g[inode->ii],inode->lcm)) { |
inode->del = 1; |
inode->del = 1; |
if (Verbose) printf("Criterion1([%d,%d],[%d,%d]) ", |
if (Verbose) printf("Criterion1([%d,%d],[%d,%d]) ", |
inode->ig,inode->ii, |
inode->ig,inode->ii, |
gtGrade,t); |
gtGrade,t); |
Criterion1++; |
Criterion1++; |
} |
} |
} |
} |
inode = inode->next; |
inode = inode->next; |
} |
} |
Line 136 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
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Line 139 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
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while (inode != (struct pair *)NULL) { |
while (inode != (struct pair *)NULL) { |
if (inode->del == 0) { |
if (inode->del == 0) { |
if (Sugar) { |
if (Sugar) { |
inode->grade = sugarGrade(inode,grG,gt,gtGrade); |
inode->grade = sugarGrade(inode,grG,gt,gtGrade); |
}else{ |
}else{ |
inode->grade = (*grade)(inode->lcm); |
inode->grade = (*grade)(inode->lcm); |
} |
} |
if (grD->lim <= inode->grade) { |
if (grD->lim <= inode->grade) { |
grD = enlargeGradedPairs(2*(inode->grade)+1,grD); |
grD = enlargeGradedPairs(2*(inode->grade)+1,grD); |
} |
} |
insertPair(inode,grD->pairs[inode->grade]); |
insertPair(inode,grD->pairs[inode->grade]); |
grD->maxGrade = max(grD->maxGrade,inode->grade+1); /* don't forget */ |
grD->maxGrade = max(grD->maxGrade,inode->grade+1); /* don't forget */ |
Line 156 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
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Line 159 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
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} |
} |
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struct gradedPolySet *groebner_gen(f,needBack,needSyz,grP,countDown,forceReduction) |
struct gradedPolySet *groebner_gen(f,needBack,needSyz,grP,countDown,forceReduction) |
struct arrayOfPOLY *f; |
struct arrayOfPOLY *f; |
int needBack; |
int needBack; |
int needSyz; |
int needSyz; |
struct pair **grP; /* if (needSyz), it is set. */ |
struct pair **grP; /* if (needSyz), it is set. */ |
int countDown; |
int countDown; |
int forceReduction; |
int forceReduction; |
{ |
{ |
int r; |
int r; |
struct gradedPolySet *g; |
struct gradedPolySet *g; |
Line 219 int forceReduction; |
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Line 222 int forceReduction; |
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serial = i; |
serial = i; |
if (!needBack) { |
if (!needBack) { |
g = putPolyInG(g,gt,grade,indx, |
g = putPolyInG(g,gt,grade,indx, |
(struct syz0 *)NULL,1,serial); |
(struct syz0 *)NULL,1,serial); |
}else { |
}else { |
syzp = newSyz0(); |
syzp = newSyz0(); |
syzp->cf = cxx(1,0,0,rp); |
syzp->cf = cxx(1,0,0,rp); |
Line 256 int forceReduction; |
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Line 259 int forceReduction; |
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if (KanGBmessage) { |
if (KanGBmessage) { |
if (KanGBmessage == 2) { |
if (KanGBmessage == 2) { |
printf("sp([%d,%d],[%d,%d]), ",ig,ii,jg,ji); |
printf("sp([%d,%d],[%d,%d]), ",ig,ii,jg,ji); |
if (rd ISZERO) { |
if (rd ISZERO) { |
printf(" 0 \n"); |
printf(" 0 \n"); |
} else{ |
} else{ |
printf(" terms=%d, grade=%d, ",pLength(rd),top->grade); |
printf(" terms=%d, grade=%d, ",pLength(rd),top->grade); |
printf(" init=%s, ",POLYToString(head(rd),'*',1)); |
printf(" init=%s, ",POLYToString(head(rd),'*',1)); |
} |
} |
}else{ |
}else{ |
if (pgrade != top->grade) { |
if (pgrade != top->grade) { |
pgrade = top->grade; |
pgrade = top->grade; |
printf(" %d",pgrade); |
printf(" %d",pgrade); |
fflush(stdout); |
fflush(stdout); |
} |
} |
if (rd ISZERO) { |
if (rd ISZERO) { |
printf("o"); fflush(stdout); |
printf("o"); fflush(stdout); |
}else{ |
}else{ |
printf("."); fflush(stdout); |
printf("."); fflush(stdout); |
} |
} |
} |
} |
} |
} |
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if (!(rd ISZERO)) { |
if (!(rd ISZERO)) { |
if (needBack || needSyz) { |
if (needBack || needSyz) { |
syzp = newSyz0(); |
syzp = newSyz0(); |
syzp->cf = syzCf; /* no meaning */ |
syzp->cf = syzCf; /* no meaning */ |
syzp->syz = ppAdd(toSyzPoly(h.a,ig,ii),toSyzPoly(h.b,jg,ji)); |
syzp->syz = ppAdd(toSyzPoly(h.a,ig,ii),toSyzPoly(h.b,jg,ji)); |
syzp->syz = cpMult(toSyzCoeff(syzCf),syzp->syz); |
syzp->syz = cpMult(toSyzCoeff(syzCf),syzp->syz); |
syzp->syz = ppAdd(syzp->syz,syzPoly); |
syzp->syz = ppAdd(syzp->syz,syzPoly); |
} |
} |
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if (ReduceLowerTerms && !(Sugar)) { |
if (ReduceLowerTerms && !(Sugar)) { |
rd = (*reductionCdr)(rd,g,needBack,&syz); |
rd = (*reductionCdr)(rd,g,needBack,&syz); |
if (needBack || needSyz) { |
if (needBack || needSyz) { |
/* syzp->cf = ppMult(syz.cf,syzp->cf); no meaning */ |
/* syzp->cf = ppMult(syz.cf,syzp->cf); no meaning */ |
syzp->syz = ppAdd(syz.syz, |
syzp->syz = ppAdd(syz.syz, |
cpMult(toSyzCoeff(syz.cf),syzp->syz)); |
cpMult(toSyzCoeff(syz.cf),syzp->syz)); |
} |
} |
} |
} |
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if(Sugar && (!forceReduction)){grade=top->grade;}else{grade=-1;}whereInG(g,rd,&grade,&indx,Sugar); |
if(Sugar && (!forceReduction)){grade=top->grade;}else{grade=-1;}whereInG(g,rd,&grade,&indx,Sugar); |
if (KanGBmessage == 2) { |
if (KanGBmessage == 2) { |
printf("(gr,indx)=(%d,%d).\n",grade,indx); |
printf("(gr,indx)=(%d,%d).\n",grade,indx); |
/* |
/* |
printf("sp(%s,%s)-->%s\n",POLYToString(gi,' ',1), |
printf("sp(%s,%s)-->%s\n",POLYToString(gi,' ',1), |
POLYToString(gj,' ',1), |
POLYToString(gj,' ',1), |
POLYToString(rd,' ',1)); |
POLYToString(rd,' ',1)); |
*/ |
*/ |
} |
} |
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d = updatePairs(d,rd,grade,indx,g); |
d = updatePairs(d,rd,grade,indx,g); |
g = putPolyInG(g,rd,grade,indx,syzp,0,-1); |
g = putPolyInG(g,rd,grade,indx,syzp,0,-1); |
if (Sugar) { markRedundant0(g,grade,indx);} |
if (Sugar) { markRedundant0(g,grade,indx);} |
else {markRedundant(g,rd,grade,indx,Sugar);} |
else {markRedundant(g,rd,grade,indx,Sugar);} |
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if (KanGBmessage && (StopDegree < pgrade)) { |
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printf("Computation of the Groebner basis is suspended bacause of StopDegree < computing grade.\n"); |
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printf("Note that the result is NOT groebner basis.\n"); |
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break; |
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} |
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if (countDown) { |
if (countDown) { |
if (eliminated(rd) == 1) { |
if (eliminated(rd) == 1) { |
--countDown; |
--countDown; |
printf("x"); fflush(stdout); |
printf("x"); fflush(stdout); |
if (countDown == 0) { |
if (countDown == 0) { |
printf("\nThe computation of the Groebner basis is suspended because of countDown==0.\n"); |
printf("\nThe computation of the Groebner basis is suspended because of countDown==0.\n"); |
printf("Note that the result is NOT groebner basis.\n"); |
printf("Note that the result is NOT groebner basis.\n"); |
break; |
break; |
} |
} |
} |
} |
} |
} |
if (Debug) { |
if (Debug) { |
outputGradedPairs(d); outputGradedPolySet(g,needSyz); |
outputGradedPairs(d); outputGradedPolySet(g,needSyz); |
} |
} |
}else{ |
}else{ |
if (needSyz) { |
if (needSyz) { |
top->syz = ppAdd(toSyzPoly(h.a,ig,ii),toSyzPoly(h.b,jg,ji)); |
top->syz = ppAdd(toSyzPoly(h.a,ig,ii),toSyzPoly(h.b,jg,ji)); |
top->syz = cpMult(toSyzCoeff(syzCf),top->syz); |
top->syz = cpMult(toSyzCoeff(syzCf),top->syz); |
top->syz = ppAdd(top->syz,syzPoly); |
top->syz = ppAdd(top->syz,syzPoly); |
listP->next = top; top->prev = listP; listP = listP->next; |
listP->next = top; top->prev = listP; listP = listP->next; |
} |
} |
} |
} |
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if (StopDegree < pgrade) { |
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fprintf(stderr,"Obtained a partial GB (StopDegree=%d)\n",StopDegree); |
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if (KanGBmessage) { |
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printf("Computation of the Groebner basis is suspended bacause of StopDegree < computing grade.\n"); |
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printf("Note that the result is NOT groebner basis.\n"); |
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} |
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break; |
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} |
} |
} |
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if (KanGBmessage == 2) { |
if (KanGBmessage == 2) { |
Line 357 int forceReduction; |
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Line 363 int forceReduction; |
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Spairs = Criterion1 = Criterion2M = Criterion2F = Criterion2B = 0; |
Spairs = Criterion1 = Criterion2M = Criterion2F = Criterion2B = 0; |
} |
} |
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if (AutoReduce) { |
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toReducedBasis(g,needBack,needSyz); |
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} |
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return(g); |
return(g); |
} |
} |
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static int sugarGrade(struct pair *inode,struct gradedPolySet *grG, |
static int sugarGrade(struct pair *inode,struct gradedPolySet *grG, |
POLY gt,int gtSugarGrade) |
POLY gt,int gtSugarGrade) |
{ |
{ |
int a,b,ans; |
int a,b,ans; |
int debug = 0; |
int debug = 0; |
Line 371 static int sugarGrade(struct pair *inode,struct graded |
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Line 380 static int sugarGrade(struct pair *inode,struct graded |
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b = grade_gen(inode->lcm)-grade_gen(gt); |
b = grade_gen(inode->lcm)-grade_gen(gt); |
/* inode = lcm(f_i, gt) = p f_i = q gt modulo lower order terms. |
/* inode = lcm(f_i, gt) = p f_i = q gt modulo lower order terms. |
a = tdeg(p), b = tdeg(gt); |
a = tdeg(p), b = tdeg(gt); |
*/ |
*/ |
if (debug) { |
if (debug) { |
printf("Sugar grade of sp([%d,%d],[%d,%d]) ",inode->ig,inode->ii, |
printf("Sugar grade of sp([%d,%d],[%d,%d]) ",inode->ig,inode->ii, |
inode->jg,inode->ji); |
inode->jg,inode->ji); |
printf("is max(%d+%d,%d+%d)\n",a,inode->ig,b,gtSugarGrade); |
printf("is max(%d+%d,%d+%d)\n",a,inode->ig,b,gtSugarGrade); |
} |
} |
a = a+(inode->ig); /* new sugar degree of p f_i. */ |
a = a+(inode->ig); /* new sugar degree of p f_i. */ |
Line 382 static int sugarGrade(struct pair *inode,struct graded |
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Line 391 static int sugarGrade(struct pair *inode,struct graded |
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return( a > b ? a : b); |
return( a > b ? a : b); |
} |
} |
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void toReducedBasis(struct gradedPolySet *grP,int needBack, int needSyz) |
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{ |
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int changed, grd, i, reduced, grade,indx; |
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struct syz0 syz; |
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struct syz0 *syzp; |
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POLY f; |
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POLY rd; |
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struct polySet *set; |
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/* KanGBmessage=1; */ |
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do { |
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if (KanGBmessage) { |
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printf("s"); fflush(stdout); |
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} |
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changed = 0; |
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grd = 0; |
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while (grd < grP->maxGrade) { |
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set = grP->polys[grd]; |
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for (i=0; i<set->size; i++) { |
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if (set->del[i] == 0) { |
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f = set->g[i]; |
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if (KanGBmessage) { |
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/* printf("(%d,%d)",grd,i); */ |
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fflush(stdout); |
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} |
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rd = reductionCdr_except_grd_i(f,grP,needBack,&syz,grd,i,&reduced); |
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if (KanGBmessage) { |
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if (reduced) { |
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printf("."); |
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}else{ |
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printf("o"); |
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} |
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fflush(stdout); |
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} |
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if (reduced) { |
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changed = 1; |
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set->del[i] = 1; |
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if (rd != ZERO) { |
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if (needSyz) { |
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syzp = newSyz0(); |
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syzp->cf = syz.cf; /* no meaning */ |
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syzp->syz = toSyzPoly(cxx(1,0,0,rd->m->ringp),grd,i); |
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syzp->syz = cpMult(toSyzCoeff(syz.cf),syzp->syz); |
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syzp->syz = ppAdd(syzp->syz,syz.syz); |
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/* rd = c*f + \sum c_{d,i} g_{d,i} |
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c : syz.cf, \sum c_{d,j} g_{d,j} : syz.syz. |
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c*grade^grd*index^i + \sum c_{d,j} grade^d*index^j |
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grP is a set of polynomials. Polynomials are indexed by |
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grade and index. |
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*/ |
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/* printf("%s, ",POLYToString(syzp->cf,' ',1)); |
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printf("%s\n",POLYToString(syzp->syz,' ',1)); */ |
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}else{ |
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syzp = NULL; |
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} |
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grade = -1; whereInG(grP,rd,&grade,&indx,Sugar); |
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/* Do not forget to set grade to -1 */ |
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/* printf("grade=%d, indx=%d, ",grade,indx); */ |
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putPolyInG(grP,rd,grade,indx,syzp,0,-1); |
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} |
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} |
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} |
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} |
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grd++; |
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} |
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} while(changed); |
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if (KanGBmessage) { |
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printf("Done(reduced basis)\n"); |
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} |
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} |
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