| version 1.3, 2000/02/24 00:27:12 |
version 1.5, 2001/05/04 01:06:23 |
|
|
| /* $OpenXM: OpenXM/src/kan96xx/Kan/gb.c,v 1.2 2000/01/16 07:55:38 takayama Exp $ */ |
/* $OpenXM: OpenXM/src/kan96xx/Kan/gb.c,v 1.4 2000/03/15 01:31:17 takayama Exp $ */ |
| |
/* untabify on May 4, 2001 */ |
| #include <stdio.h> |
#include <stdio.h> |
| #include "datatype.h" |
#include "datatype.h" |
| #include "extern2.h" |
#include "extern2.h" |
| Line 12 int KanGBmessage = 1; |
|
| Line 13 int KanGBmessage = 1; |
|
| |
|
| 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 24 extern int AutoReduce; |
|
| Line 25 extern int AutoReduce; |
|
| |
|
| |
|
| 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 50 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
|
| Line 51 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
|
| 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) { |
| |
|
| }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 71 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
|
| Line 72 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
|
| /* 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. |
| */ |
*/ |
| |
|
| inode = node->next; |
inode = node->next; |
| while (inode != (struct pair *)NULL) { |
while (inode != (struct pair *)NULL) { |
| Line 80 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
|
| Line 81 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
|
| 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; |
| } |
} |
| |
|
| 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 138 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
|
| Line 139 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
|
| 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 158 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
|
| Line 159 struct gradedPolySet *grG; /* (f,gt), f \in grG, shoul |
|
| } |
} |
| |
|
| 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 221 int forceReduction; |
|
| Line 222 int forceReduction; |
|
| 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 258 int forceReduction; |
|
| Line 259 int forceReduction; |
|
| |
|
| 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); |
| } |
} |
| } |
} |
| } |
} |
| |
|
| 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); |
| } |
} |
| |
|
| 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)); |
| } |
} |
| } |
} |
| |
|
| 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)); |
| */ |
*/ |
| } |
} |
| |
|
| 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);} |
| |
|
| if (KanGBmessage && (StopDegree < pgrade)) { |
|
| printf("Computation of the Groebner basis is suspended bacause of StopDegree < computing grade.\n"); |
|
| printf("Note that the result is NOT groebner basis.\n"); |
|
| break; |
|
| } |
|
| 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; |
| } |
} |
| } |
} |
| |
if (StopDegree < pgrade) { |
| |
fprintf(stderr,"Obtained a partial GB (StopDegree=%d)\n",StopDegree); |
| |
if (KanGBmessage) { |
| |
printf("Computation of the Groebner basis is suspended bacause of StopDegree < computing grade.\n"); |
| |
printf("Note that the result is NOT groebner basis.\n"); |
| |
} |
| |
break; |
| |
} |
| } |
} |
| |
|
| if (KanGBmessage == 2) { |
if (KanGBmessage == 2) { |
| Line 368 int forceReduction; |
|
| Line 372 int forceReduction; |
|
| |
|
| |
|
| 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 376 static int sugarGrade(struct pair *inode,struct graded |
|
| Line 380 static int sugarGrade(struct pair *inode,struct graded |
|
| 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 406 void toReducedBasis(struct gradedPolySet *grP,int need |
|
| Line 410 void toReducedBasis(struct gradedPolySet *grP,int need |
|
| while (grd < grP->maxGrade) { |
while (grd < grP->maxGrade) { |
| set = grP->polys[grd]; |
set = grP->polys[grd]; |
| for (i=0; i<set->size; i++) { |
for (i=0; i<set->size; i++) { |
| if (set->del[i] == 0) { |
if (set->del[i] == 0) { |
| f = set->g[i]; |
f = set->g[i]; |
| if (KanGBmessage) { |
if (KanGBmessage) { |
| /* printf("(%d,%d)",grd,i); */ |
/* printf("(%d,%d)",grd,i); */ |
| fflush(stdout); |
fflush(stdout); |
| } |
} |
| rd = reductionCdr_except_grd_i(f,grP,needBack,&syz,grd,i,&reduced); |
rd = reductionCdr_except_grd_i(f,grP,needBack,&syz,grd,i,&reduced); |
| if (KanGBmessage) { |
if (KanGBmessage) { |
| if (reduced) { |
if (reduced) { |
| printf("."); |
printf("."); |
| }else{ |
}else{ |
| printf("o"); |
printf("o"); |
| } |
} |
| fflush(stdout); |
fflush(stdout); |
| } |
} |
| if (reduced) { |
if (reduced) { |
| changed = 1; |
changed = 1; |
| set->del[i] = 1; |
set->del[i] = 1; |
| if (rd != ZERO) { |
if (rd != ZERO) { |
| if (needSyz) { |
if (needSyz) { |
| syzp = newSyz0(); |
syzp = newSyz0(); |
| syzp->cf = syz.cf; /* no meaning */ |
syzp->cf = syz.cf; /* no meaning */ |
| syzp->syz = toSyzPoly(cxx(1,0,0,rd->m->ringp),grd,i); |
syzp->syz = toSyzPoly(cxx(1,0,0,rd->m->ringp),grd,i); |
| syzp->syz = cpMult(toSyzCoeff(syz.cf),syzp->syz); |
syzp->syz = cpMult(toSyzCoeff(syz.cf),syzp->syz); |
| syzp->syz = ppAdd(syzp->syz,syz.syz); |
syzp->syz = ppAdd(syzp->syz,syz.syz); |
| /* rd = c*f + \sum c_{d,i} g_{d,i} |
/* rd = c*f + \sum c_{d,i} g_{d,i} |
| c : syz.cf, \sum c_{d,j} g_{d,j} : syz.syz. |
c : syz.cf, \sum c_{d,j} g_{d,j} : syz.syz. |
| c*grade^grd*index^i + \sum c_{d,j} grade^d*index^j |
c*grade^grd*index^i + \sum c_{d,j} grade^d*index^j |
| grP is a set of polynomials. Polynomials are indexed by |
grP is a set of polynomials. Polynomials are indexed by |
| grade and index. |
grade and index. |
| */ |
*/ |
| /* printf("%s, ",POLYToString(syzp->cf,' ',1)); |
/* printf("%s, ",POLYToString(syzp->cf,' ',1)); |
| printf("%s\n",POLYToString(syzp->syz,' ',1)); */ |
printf("%s\n",POLYToString(syzp->syz,' ',1)); */ |
| }else{ |
}else{ |
| syzp = NULL; |
syzp = NULL; |
| } |
} |
| grade = -1; whereInG(grP,rd,&grade,&indx,Sugar); |
grade = -1; whereInG(grP,rd,&grade,&indx,Sugar); |
| /* Do not forget to set grade to -1 */ |
/* Do not forget to set grade to -1 */ |
| /* printf("grade=%d, indx=%d, ",grade,indx); */ |
/* printf("grade=%d, indx=%d, ",grade,indx); */ |
| putPolyInG(grP,rd,grade,indx,syzp,0,-1); |
putPolyInG(grP,rd,grade,indx,syzp,0,-1); |
| } |
} |
| } |
} |
| } |
} |
| } |
} |
| grd++; |
grd++; |
| } |
} |