version 1.7, 2002/10/30 08:07:11 |
version 1.22, 2018/03/29 01:32:51 |
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/* $OpenXM: OpenXM_contrib2/asir2000/engine/Fgfs.c,v 1.6 2002/10/25 02:43:40 noro Exp $ */ |
/* $OpenXM: OpenXM_contrib2/asir2000/engine/Fgfs.c,v 1.21 2004/04/03 05:52:56 noro Exp $ */ |
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#include "ca.h" |
#include "ca.h" |
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void cont_pp_mv_sf(VL vl,VL rvl,P p,P *c,P *pp); |
void cont_pp_mv_sf(VL vl,VL rvl,P p,P *c,P *pp); |
void gcdsf_main(VL vl,P *pa,int m,P *r); |
void gcdsf_main(VL vl,P *pa,int m,P *r); |
void ugcdsf(P *pa,int m,P *r); |
void ugcdsf(P *pa,int m,P *r); |
void head_monomial(V v,P p,P *coef,P *term); |
void head_monomial(VL vl,V v,P p,P *coef,P *term); |
void sqfrsfmain(VL vl,P f,DCP *dcp); |
void sqfrsfmain(VL vl,P f,DCP *dcp); |
void pthrootsf(P f,Q m,P *r); |
void pthrootsf(P f,Q m,P *r); |
void partial_sqfrsf(VL vl,V v,P f,P *r,DCP *dcp); |
void partial_sqfrsf(VL vl,V v,P f,P *r,DCP *dcp); |
void gcdsf(VL vl,P *pa,int k,P *r); |
void gcdsf(VL vl,P *pa,int k,P *r); |
void mfctrsfmain(VL vl, P f, DCP *dcp); |
void mfctrsfmain(VL vl, P f, DCP *dcp); |
void next_evaluation_point(int *mev,int n); |
void next_evaluation_point(int *mev,int n); |
void estimatelc_sf(VL vl,VL rvl,P c,DCP dc,P *lcp); |
void estimatelc_sf(VL vl,VL rvl,P c,DCP dc,int *mev,P *lcp); |
void mfctrsf_hensel(VL vl,VL rvl,P f,P pp0,P u0,P v0,P lcu,P lcv,P *up); |
void mfctrsf_hensel(VL vl,VL rvl,P f,P pp0,P u0,P v0,P lcu,P lcv,int *mev,P *up); |
void substvp_sf(VL vl,VL rvl,P f,int *mev,P *r); |
void substvp_sf(VL vl,VL rvl,P f,int *mev,P *r); |
void shift_sf(VL vl, VL rvl, P f, int *mev, int sgn, P *r); |
void shift_sf(VL vl, VL rvl, P f, int *mev, int sgn, P *r); |
void adjust_coef_sf(VL vl,VL rvl,P lcu,P u0,P *r); |
void adjust_coef_sf(VL vl,VL rvl,P lcu,P u0,int *mev,P *r); |
void extended_gcd_modyk(P u0,P v0,P *cu,P *cv); |
void extended_gcd_modyk(P u0,P v0,V x,V y,int dy,P *cu,P *cv); |
void poly_to_gfsn_poly(VL vl,P f,V v,P *r); |
void poly_to_gfsn_poly(VL vl,P f,V v,P *r); |
void gfsn_poly_to_poly(VL vl,P f,V v,P *r); |
void gfsn_poly_to_poly(VL vl,P f,V v,P *r); |
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void poly_to_gfsn_poly_main(P f,V v,P *r); |
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void gfsn_poly_to_poly_main(P f,V v,P *r); |
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void gfsn_univariate_to_sfbm(P f,int dy,BM *r); |
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void sfbm_to_gfsn_univariate(BM f,V x,V y,P *r); |
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void monomialfctr_sf(VL vl,P p,P *pr,DCP *dcp) |
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{ |
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VL nvl,avl; |
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Q d; |
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P f,t,s; |
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DCP dc0,dc; |
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Obj obj; |
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clctv(vl,p,&nvl); |
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for ( dc0 = 0, avl = nvl, f = p; avl; avl = NEXT(avl) ) { |
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getmindeg(avl->v,f,&d); |
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if ( d ) { |
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MKV(avl->v,t); |
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simp_ff((Obj)t,&obj); t = (P)obj; |
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NEXTDC(dc0,dc); DEG(dc) = d; COEF(dc) = t; |
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pwrp(vl,t,d,&s); divsp(vl,f,s,&t); f = t; |
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} |
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} |
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if ( dc0 ) |
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NEXT(dc) = 0; |
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*pr = f; *dcp = dc0; |
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} |
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void lex_lc(P f,P *c) |
void lex_lc(P f,P *c) |
{ |
{ |
if ( !f || NUM(f) ) |
if ( !f || NUM(f) ) |
*c = f; |
*c = f; |
else |
else |
lex_lc(COEF(DC(f)),c); |
lex_lc(COEF(DC(f)),c); |
} |
} |
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DCP append_dc(DCP dc,DCP dct) |
DCP append_dc(DCP dc,DCP dct) |
{ |
{ |
DCP dcs; |
DCP dcs; |
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if ( !dc ) |
if ( !dc ) |
return dct; |
return dct; |
else { |
else { |
for ( dcs = dc; NEXT(dcs); dcs = NEXT(dcs) ); |
for ( dcs = dc; NEXT(dcs); dcs = NEXT(dcs) ); |
NEXT (dcs) = dct; |
NEXT (dcs) = dct; |
return dc; |
return dc; |
} |
} |
} |
} |
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void sqfrsf(VL vl, P f, DCP *dcp) |
void sqfrsf(VL vl, P f, DCP *dcp) |
{ |
{ |
DCP dc,dct; |
DCP dc,dct; |
Obj obj; |
Obj obj; |
P t,s,c; |
P t,s,c,cont; |
VL tvl,nvl; |
VL tvl,onevl; |
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simp_ff((Obj)f,&obj); f = (P)obj; |
simp_ff((Obj)f,&obj); f = (P)obj; |
lex_lc(f,&c); divsp(vl,f,c,&t); f = t; |
lex_lc(f,&c); divsp(vl,f,c,&t); f = t; |
monomialfctr(vl,f,&t,&dc); f = t; |
monomialfctr_sf(vl,f,&t,&dc); f = t; |
clctv(vl,f,&tvl); vl = tvl; |
clctv(vl,f,&tvl); vl = tvl; |
if ( !vl ) |
NEWVL(onevl); NEXT(onevl)=0; |
; |
if ( !vl ) |
else if ( !NEXT(vl) ) { |
; |
sfusqfr(f,&dct); |
else if ( !NEXT(vl) ) { |
dc = append_dc(dc,NEXT(dct)); |
sfusqfr(f,&dct); |
} else { |
dc = append_dc(dc,NEXT(dct)); |
t = f; |
} else { |
for ( tvl = vl; tvl; tvl = NEXT(tvl) ) { |
t = f; |
reordvar(vl,tvl->v,&nvl); |
for ( tvl = vl; tvl; tvl = NEXT(tvl) ) { |
cont_pp_mv_sf(vl,NEXT(nvl),t,&c,&s); t = s; |
onevl->v = tvl->v; |
sqfrsf(vl,c,&dct); |
cont_pp_mv_sf(vl,onevl,t,&cont,&s); t = s; |
dc = append_dc(dc,NEXT(dct)); |
sqfrsf(vl,cont,&dct); |
} |
dc = append_dc(dc,NEXT(dct)); |
sqfrsfmain(vl,t,&dct); |
} |
dc = append_dc(dc,dct); |
sqfrsfmain(vl,t,&dct); |
} |
dc = append_dc(dc,dct); |
NEWDC(dct); DEG(dct) = ONE; COEF(dct) = (P)c; NEXT(dct) = dc; |
} |
*dcp = dct; |
NEWDC(dct); DEG(dct) = ONE; COEF(dct) = (P)c; NEXT(dct) = dc; |
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*dcp = dct; |
} |
} |
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void sqfrsfmain(VL vl,P f,DCP *dcp) |
void sqfrsfmain(VL vl,P f,DCP *dcp) |
{ |
{ |
VL tvl; |
VL tvl; |
DCP dc,dct,dcs; |
DCP dc,dct,dcs; |
P t,s; |
P t,s; |
Q m,m1; |
Q m,m1; |
V v; |
V v; |
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clctv(vl,f,&tvl); vl = tvl; |
clctv(vl,f,&tvl); vl = tvl; |
dc = 0; |
dc = 0; |
t = f; |
t = f; |
for ( tvl = vl; tvl; tvl = NEXT(tvl) ) { |
for ( tvl = vl; tvl; tvl = NEXT(tvl) ) { |
v = tvl->v; |
v = tvl->v; |
partial_sqfrsf(vl,v,t,&s,&dct); t = s; |
partial_sqfrsf(vl,v,t,&s,&dct); t = s; |
dc = append_dc(dc,dct); |
dc = append_dc(dc,dct); |
} |
} |
if ( !NUM(t) ) { |
if ( !NUM(t) ) { |
STOQ(characteristic_sf(),m); |
STOQ(characteristic_sf(),m); |
pthrootsf(t,m,&s); |
pthrootsf(t,m,&s); |
sqfrsfmain(vl,s,&dct); |
sqfrsfmain(vl,s,&dct); |
for ( dcs = dct; dcs; dcs = NEXT(dcs) ) { |
for ( dcs = dct; dcs; dcs = NEXT(dcs) ) { |
mulq(DEG(dcs),m,&m1); DEG(dcs) = m1; |
mulq(DEG(dcs),m,&m1); DEG(dcs) = m1; |
} |
} |
dc = append_dc(dc,dct); |
dc = append_dc(dc,dct); |
} |
} |
*dcp = dc; |
*dcp = dc; |
} |
} |
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void pthrootsf(P f,Q m,P *r) |
void pthrootsf(P f,Q m,P *r) |
{ |
{ |
DCP dc,dc0,dct; |
DCP dc,dc0,dct; |
N qn,rn; |
N qn,rn; |
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if ( NUM(f) ) |
if ( NUM(f) ) |
pthrootgfs(f,r); |
pthrootgfs(f,r); |
else { |
else { |
dc = DC(f); |
dc = DC(f); |
dc0 = 0; |
dc0 = 0; |
for ( dc0 = 0; dc; dc = NEXT(dc) ) { |
for ( dc0 = 0; dc; dc = NEXT(dc) ) { |
NEXTDC(dc0,dct); |
NEXTDC(dc0,dct); |
pthrootsf(COEF(dc),m,&COEF(dct)); |
pthrootsf(COEF(dc),m,&COEF(dct)); |
if ( DEG(dc) ) { |
if ( DEG(dc) ) { |
divn(NM(DEG(dc)),NM(m),&qn,&rn); |
divn(NM(DEG(dc)),NM(m),&qn,&rn); |
if ( rn ) |
if ( rn ) |
error("pthrootsf : cannot happen"); |
error("pthrootsf : cannot happen"); |
NTOQ(qn,1,DEG(dct)); |
NTOQ(qn,1,DEG(dct)); |
} else |
} else |
DEG(dct) = 0; |
DEG(dct) = 0; |
} |
} |
NEXT(dct) = 0; |
NEXT(dct) = 0; |
MKP(VR(f),dc0,*r); |
MKP(VR(f),dc0,*r); |
} |
} |
} |
} |
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void partial_sqfrsf(VL vl,V v,P f,P *r,DCP *dcp) |
void partial_sqfrsf(VL vl,V v,P f,P *r,DCP *dcp) |
{ |
{ |
P ps[2]; |
P ps[2]; |
DCP dc0,dc; |
DCP dc0,dc; |
int m; |
int m; |
P t,flat,flat1,g,df,q; |
P t,flat,flat1,g,df,q; |
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diffp(vl,f,v,&df); |
diffp(vl,f,v,&df); |
if ( !df ) { |
if ( !df ) { |
*dcp = 0; |
*dcp = 0; |
*r = f; |
*r = f; |
return; |
return; |
} |
} |
ps[0] = f; ps[1] = df; |
ps[0] = f; ps[1] = df; |
gcdsf(vl,ps,2,&g); |
gcdsf(vl,ps,2,&g); |
divsp(vl,f,g,&flat); |
divsp(vl,f,g,&flat); |
m = 0; |
m = 0; |
t = f; |
t = f; |
dc0 = 0; |
dc0 = 0; |
while ( !NUM(flat) ) { |
while ( !NUM(flat) ) { |
while ( divtp(vl,t,flat,&q) ) { |
while ( divtp(vl,t,flat,&q) ) { |
t = q; m++; |
t = q; m++; |
} |
} |
ps[0] = t; ps[1] = flat; |
ps[0] = t; ps[1] = flat; |
gcdsf(vl,ps,2,&flat1); |
gcdsf(vl,ps,2,&flat1); |
divsp(vl,flat,flat1,&g); |
divsp(vl,flat,flat1,&g); |
flat = flat1; |
flat = flat1; |
NEXTDC(dc0,dc); |
NEXTDC(dc0,dc); |
COEF(dc) = g; |
COEF(dc) = g; |
STOQ(m,DEG(dc)); |
STOQ(m,DEG(dc)); |
} |
} |
NEXT(dc) = 0; |
NEXT(dc) = 0; |
*dcp = dc0; |
*dcp = dc0; |
*r = t; |
*r = t; |
} |
} |
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void gcdsf(VL vl,P *pa,int k,P *r) |
void gcdsf(VL vl,P *pa,int k,P *r) |
{ |
{ |
P *ps,*pl,*pm; |
P *ps,*pl,*pm; |
P **cp; |
P **cp; |
int *cn; |
int *cn; |
DCP *ml; |
DCP *ml; |
Obj obj; |
Obj obj; |
int i,j,l,m; |
int i,j,l,m; |
P mg,mgsf,t; |
P mg,mgsf,t; |
VL avl,nvl,tvl,svl; |
VL avl,nvl,tvl,svl; |
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ps = (P *)ALLOCA(k*sizeof(P)); |
ps = (P *)ALLOCA(k*sizeof(P)); |
for ( i = 0, m = 0; i < k; i++ ) { |
for ( i = 0, m = 0; i < k; i++ ) { |
simp_ff((Obj)pa[i],&obj); |
simp_ff((Obj)pa[i],&obj); |
if ( obj ) |
if ( obj ) |
ps[m++] = (P)obj; |
ps[m++] = (P)obj; |
} |
} |
if ( !m ) { |
if ( !m ) { |
*r = 0; |
*r = 0; |
return; |
return; |
} |
} |
if ( m == 1 ) { |
if ( m == 1 ) { |
*r = ps[0]; |
*r = ps[0]; |
return; |
return; |
} |
} |
pl = (P *)ALLOCA(m*sizeof(P)); |
pl = (P *)ALLOCA(m*sizeof(P)); |
ml = (DCP *)ALLOCA(m*sizeof(DCP)); |
ml = (DCP *)ALLOCA(m*sizeof(DCP)); |
for ( i = 0; i < m; i++ ) |
for ( i = 0; i < m; i++ ) |
monomialfctr(vl,ps[i],&pl[i],&ml[i]); |
monomialfctr(vl,ps[i],&pl[i],&ml[i]); |
gcdmonomial(vl,ml,m,&mg); simp_ff((Obj)mg,&obj); mgsf = (P)obj; |
gcdmonomial(vl,ml,m,&mg); simp_ff((Obj)mg,&obj); mgsf = (P)obj; |
for ( i = 0, nvl = vl, avl = 0; nvl && i < m; i++ ) { |
for ( i = 0, nvl = vl, avl = 0; nvl && i < m; i++ ) { |
clctv(vl,pl[i],&tvl); |
clctv(vl,pl[i],&tvl); |
intersectv(nvl,tvl,&svl); nvl = svl; |
intersectv(nvl,tvl,&svl); nvl = svl; |
mergev(vl,avl,tvl,&svl); avl = svl; |
mergev(vl,avl,tvl,&svl); avl = svl; |
} |
} |
if ( !nvl ) { |
if ( !nvl ) { |
*r = mgsf; |
*r = mgsf; |
return; |
return; |
} |
} |
if ( !NEXT(avl) ) { |
if ( !NEXT(avl) ) { |
ugcdsf(pl,m,&t); |
ugcdsf(pl,m,&t); |
mulp(vl,mgsf,t,r); |
mulp(vl,mgsf,t,r); |
return; |
return; |
} |
} |
for ( tvl = nvl, i = 0; tvl; tvl = NEXT(tvl), i++ ); |
for ( tvl = nvl, i = 0; tvl; tvl = NEXT(tvl), i++ ); |
for ( tvl = avl, j = 0; tvl; tvl = NEXT(tvl), j++ ); |
for ( tvl = avl, j = 0; tvl; tvl = NEXT(tvl), j++ ); |
if ( i == j ) { |
if ( i == j ) { |
/* all the pl[i]'s have the same variables */ |
/* all the pl[i]'s have the same variables */ |
gcdsf_main(avl,pl,m,&t); |
gcdsf_main(avl,pl,m,&t); |
} else { |
} else { |
cp = (P **)ALLOCA(m*sizeof(P *)); |
cp = (P **)ALLOCA(m*sizeof(P *)); |
cn = (int *)ALLOCA(m*sizeof(int)); |
cn = (int *)ALLOCA(m*sizeof(int)); |
for ( i = 0; i < m; i++ ) { |
for ( i = 0; i < m; i++ ) { |
cp[i] = (P *)ALLOCA(lengthp(pl[i])*sizeof(P)); |
cp[i] = (P *)ALLOCA(lengthp(pl[i])*sizeof(P)); |
cn[i] = pcoef(vl,nvl,pl[i],cp[i]); |
cn[i] = pcoef(vl,nvl,pl[i],cp[i]); |
} |
} |
for ( i = j = 0; i < m; i++ ) |
for ( i = j = 0; i < m; i++ ) |
j += cn[i]; |
j += cn[i]; |
pm = (P *)ALLOCA(j*sizeof(P)); |
pm = (P *)ALLOCA(j*sizeof(P)); |
for ( i = l = 0; i < m; i++ ) |
for ( i = l = 0; i < m; i++ ) |
for ( j = 0; j < cn[i]; j++ ) |
for ( j = 0; j < cn[i]; j++ ) |
pm[l++] = cp[i][j]; |
pm[l++] = cp[i][j]; |
gcdsf(vl,pm,l,&t); |
gcdsf(vl,pm,l,&t); |
} |
} |
mulp(vl,mgsf,t,r); |
mulp(vl,mgsf,t,r); |
} |
} |
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/* univariate gcd */ |
/* univariate gcd */ |
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void ugcdsf(P *pa,int m,P *r) |
void ugcdsf(P *pa,int m,P *r) |
{ |
{ |
P *ps; |
P *ps; |
int i; |
int i; |
UM w1,w2,w3,w; |
UM w1,w2,w3,w; |
int d; |
int d; |
V v; |
V v; |
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if ( m == 1 ) { |
if ( m == 1 ) { |
*r = pa[0]; |
*r = pa[0]; |
return; |
return; |
} |
} |
for ( i = 0; i < m; i++ ) |
for ( i = 0; i < m; i++ ) |
if ( NUM(pa[i]) ) { |
if ( NUM(pa[i]) ) { |
itogfs(1,r); |
itogfs(1,r); |
return; |
return; |
} |
} |
ps = (P *)ALLOCA(m*sizeof(P)); |
ps = (P *)ALLOCA(m*sizeof(P)); |
sort_by_deg(m,pa,ps); |
sort_by_deg(m,pa,ps); |
v = VR(ps[m-1]); |
v = VR(ps[m-1]); |
d = getdeg(v,ps[m-1]); |
d = getdeg(v,ps[m-1]); |
w1 = W_UMALLOC(d); |
w1 = W_UMALLOC(d); |
w2 = W_UMALLOC(d); |
w2 = W_UMALLOC(d); |
w3 = W_UMALLOC(d); |
w3 = W_UMALLOC(d); |
ptosfum(ps[0],w1); |
ptosfum(ps[0],w1); |
for ( i = 1; i < m; i++ ) { |
for ( i = 1; i < m; i++ ) { |
ptosfum(ps[i],w2); |
ptosfum(ps[i],w2); |
gcdsfum(w1,w2,w3); |
gcdsfum(w1,w2,w3); |
w = w1; w1 = w3; w3 = w; |
w = w1; w1 = w3; w3 = w; |
if ( !DEG(w1) ) { |
if ( !DEG(w1) ) { |
itogfs(1,r); |
itogfs(1,r); |
return; |
return; |
} |
} |
} |
} |
sfumtop(v,w1,r); |
sfumtop(v,w1,r); |
} |
} |
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/* deg(HT(p),v), where p is considered as distributed poly over F[v] */ |
/* deg(HT(p),v), where p is considered as distributed poly over F[v] */ |
int gethdeg(VL vl,V v,P p) |
int gethdeg(VL vl,V v,P p) |
{ |
{ |
DCP dc; |
DCP dc; |
Q dmax; |
Q dmax; |
P cmax; |
P cmax; |
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if ( !p ) |
if ( !p ) |
return -1; |
return -1; |
else if ( NUM(p) ) |
else if ( NUM(p) ) |
return 0; |
return 0; |
else if ( VR(p) != v ) |
else if ( VR(p) != v ) |
/* HT(p) = HT(lc(p))*x^D */ |
/* HT(p) = HT(lc(p))*x^D */ |
return gethdeg(vl,v,COEF(DC(p))); |
return gethdeg(vl,v,COEF(DC(p))); |
else { |
else { |
/* VR(p) = v */ |
/* VR(p) = v */ |
dc = DC(p); dmax = DEG(dc); cmax = COEF(dc); |
dc = DC(p); dmax = DEG(dc); cmax = COEF(dc); |
for ( dc = NEXT(dc); dc; dc = NEXT(dc) ) |
for ( dc = NEXT(dc); dc; dc = NEXT(dc) ) |
if ( compp(vl,COEF(dc),cmax) > 0 ) { |
if ( compp(vl,COEF(dc),cmax) > 0 ) { |
dmax = DEG(dc); cmax = COEF(dc); |
dmax = DEG(dc); cmax = COEF(dc); |
} |
} |
return QTOS(dmax); |
return QTOS(dmax); |
} |
} |
} |
} |
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/* all the pa[i]'s have the same variables (=vl) */ |
/* all the pa[i]'s have the same variables (=vl) */ |
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void gcdsf_main(VL vl,P *pa,int m,P *r) |
void gcdsf_main(VL vl,P *pa,int m,P *r) |
{ |
{ |
int nv,i,i0,imin,d,d0,d1,d2,dmin,index; |
int nv,i,i0,imin,d,d0,d1,d2,dmin,index; |
V v,v0,vmin; |
V v,v0,vmin; |
VL tvl,nvl,rvl,nvl0,rvl0; |
VL tvl,nvl,rvl,nvl0,rvl0; |
P *pc, *ps, *ph,*lps; |
P *pc, *ps, *ph,*lps; |
P x,t,cont,hg,g,hm,mod,s; |
P x,t,cont,hg,g,hm,mod,s; |
P hge,ge,ce,he,u,cof1e,mode,mod1,adj,cof1,coadj,q; |
P hge,ge,ce,he,u,cof1e,mode,mod1,adj,cof1,coadj,q; |
GFS sf; |
GFS sf; |
|
|
for ( nv = 0, tvl = vl; tvl; tvl = NEXT(tvl), nv++); |
for ( nv = 0, tvl = vl; tvl; tvl = NEXT(tvl), nv++); |
if ( nv == 1 ) { |
if ( nv == 1 ) { |
ugcdsf(pa,m,r); |
ugcdsf(pa,m,r); |
return; |
return; |
} |
} |
/* find v s.t. min(deg(pa[i],v)+gethdeg(pa[i],v)) is minimal */ |
/* find v s.t. min(deg(pa[i],v)+gethdeg(pa[i],v)) is minimal */ |
tvl = vl; |
tvl = vl; |
do { |
do { |
v = tvl->v; |
v = tvl->v; |
i = 0; |
i = 0; |
do { |
do { |
d = getdeg(v,pa[i])+gethdeg(vl,v,pa[i]); |
d = getdeg(v,pa[i])+gethdeg(vl,v,pa[i]); |
if ( i == 0 || (d < d0) ) { |
if ( i == 0 || (d < d0) ) { |
d0 = d; i0 = i; v0 = v; |
d0 = d; i0 = i; v0 = v; |
} |
} |
} while ( ++i < m ); |
} while ( ++i < m ); |
if ( tvl == vl || (d0 < dmin) ) { |
if ( tvl == vl || (d0 < dmin) ) { |
dmin = d0; imin = i0; vmin = v0; |
dmin = d0; imin = i0; vmin = v0; |
} |
} |
} while ( tvl = NEXT(tvl) ); |
} while ( tvl = NEXT(tvl) ); |
|
|
/* reorder variables so that vmin is the last variable */ |
/* reorder variables so that vmin is the last variable */ |
for ( nvl0 = 0, rvl0 = 0, tvl = vl; tvl; tvl = NEXT(tvl) ) |
for ( nvl0 = 0, rvl0 = 0, tvl = vl; tvl; tvl = NEXT(tvl) ) |
if ( tvl->v != vmin ) { |
if ( tvl->v != vmin ) { |
NEXTVL(nvl0,nvl); nvl->v = tvl->v; |
NEXTVL(nvl0,nvl); nvl->v = tvl->v; |
NEXTVL(rvl0,rvl); rvl->v = tvl->v; |
NEXTVL(rvl0,rvl); rvl->v = tvl->v; |
} |
} |
/* rvl = remaining variables */ |
/* rvl = remaining variables */ |
NEXT(rvl) = 0; rvl = rvl0; |
NEXT(rvl) = 0; rvl = rvl0; |
/* nvl = ...,vmin */ |
/* nvl = ...,vmin */ |
NEXTVL(nvl0,nvl); nvl->v = vmin; NEXT(nvl) = 0; nvl = nvl0; |
NEXTVL(nvl0,nvl); nvl->v = vmin; NEXT(nvl) = 0; nvl = nvl0; |
MKV(vmin,x); |
MKV(vmin,x); |
|
|
/* for content and primitive part */ |
/* for content and primitive part */ |
pc = (P *)ALLOCA(m*sizeof(P)); |
pc = (P *)ALLOCA(m*sizeof(P)); |
ps = (P *)ALLOCA(m*sizeof(P)); |
ps = (P *)ALLOCA(m*sizeof(P)); |
ph = (P *)ALLOCA(m*sizeof(P)); |
ph = (P *)ALLOCA(m*sizeof(P)); |
/* separate the contents */ |
/* separate the contents */ |
for ( i = 0; i < m; i++ ) { |
for ( i = 0; i < m; i++ ) { |
reorderp(nvl,vl,pa[i],&t); |
reorderp(nvl,vl,pa[i],&t); |
cont_pp_mv_sf(nvl,rvl,t,&pc[i],&ps[i]); |
cont_pp_mv_sf(nvl,rvl,t,&pc[i],&ps[i]); |
head_monomial(vmin,ps[i],&ph[i],&t); |
head_monomial(nvl,vmin,ps[i],&ph[i],&t); |
} |
} |
ugcdsf(pc,m,&cont); |
ugcdsf(pc,m,&cont); |
ugcdsf(ph,m,&hg); |
ugcdsf(ph,m,&hg); |
|
|
/* for hg*pp (used in check phase) */ |
/* for hg*pp (used in check phase) */ |
lps = (P *)ALLOCA(m*sizeof(P)); |
lps = (P *)ALLOCA(m*sizeof(P)); |
for ( i = 0; i < m; i++ ) |
for ( i = 0; i < m; i++ ) |
mulp(nvl,hg,ps[i],&lps[i]); |
mulp(nvl,hg,ps[i],&lps[i]); |
|
|
while ( 1 ) { |
while ( 1 ) { |
g = 0; |
g = 0; |
cof1 = 0; |
cof1 = 0; |
hm = 0; |
hm = 0; |
itogfs(1,&mod); |
itogfs(1,&mod); |
index = 0; |
index = 0; |
for ( index = 0; getdeg(vmin,mod) <= d+1; index++ ) { |
for ( index = 0; getdeg(vmin,mod) <= d+1; index++ ) { |
/* evaluation pt */ |
/* evaluation pt */ |
indextogfs(index,&s); |
indextogfs(index,&s); |
substp(nvl,hg,vmin,s,&hge); |
substp(nvl,hg,vmin,s,&hge); |
if ( !hge ) |
if ( !hge ) |
continue; |
continue; |
for ( i = 0; i < m; i++ ) |
for ( i = 0; i < m; i++ ) |
substp(nvl,ps[i],vmin,s,&ph[i]); |
substp(nvl,ps[i],vmin,s,&ph[i]); |
/* ge = GCD(ps[0]|x=s,...,ps[m-1]|x=s) */ |
/* ge = GCD(ps[0]|x=s,...,ps[m-1]|x=s) */ |
gcdsf(nvl,ph,m,&ge); |
gcdsf(nvl,ph,m,&ge); |
head_monomial(vmin,ge,&ce,&he); |
head_monomial(nvl,vmin,ge,&ce,&he); |
if ( NUM(he) ) { |
if ( NUM(he) ) { |
*r = cont; |
*r = cont; |
return; |
return; |
} |
} |
divgfs((GFS)hge,(GFS)ce,&sf); t = (P)sf; |
divgfs((GFS)hge,(GFS)ce,&sf); t = (P)sf; |
mulp(nvl,t,ge,&u); ge = u; |
mulp(nvl,t,ge,&u); ge = u; |
divsp(nvl,ph[imin],ge,&t); mulp(nvl,hge,t,&cof1e); |
divsp(nvl,ph[imin],ge,&t); mulp(nvl,hge,t,&cof1e); |
/* hm=0 : reset; he==hm : lucky */ |
/* hm=0 : reset; he==hm : lucky */ |
if ( !hm || !compp(nvl,he,hm) ) { |
if ( !hm || !compp(nvl,he,hm) ) { |
substp(nvl,mod,vmin,s,&mode); divsp(nvl,mod,mode,&mod1); |
substp(nvl,mod,vmin,s,&mode); divsp(nvl,mod,mode,&mod1); |
/* adj = mod/(mod|x=s)*(ge-g|x=s) */ |
/* adj = mod/(mod|x=s)*(ge-g|x=s) */ |
substp(nvl,g,vmin,s,&t); |
substp(nvl,g,vmin,s,&t); |
subp(nvl,ge,t,&u); mulp(nvl,mod1,u,&adj); |
subp(nvl,ge,t,&u); mulp(nvl,mod1,u,&adj); |
/* coadj = mod/(mod|vmin=s)*(cof1e-cof1e|vmin=s) */ |
/* coadj = mod/(mod|vmin=s)*(cof1e-cof1e|vmin=s) */ |
substp(nvl,cof1,vmin,s,&t); |
substp(nvl,cof1,vmin,s,&t); |
subp(nvl,cof1e,t,&u); mulp(nvl,mod1,u,&coadj); |
subp(nvl,cof1e,t,&u); mulp(nvl,mod1,u,&coadj); |
if ( !adj ) { |
if ( !adj ) { |
/* adj == gcd ? */ |
/* adj == gcd ? */ |
for ( i = 0; i < m; i++ ) |
for ( i = 0; i < m; i++ ) |
if ( !divtp(nvl,lps[i],g,&t) ) |
if ( !divtp(nvl,lps[i],g,&t) ) |
break; |
break; |
if ( i == m ) { |
if ( i == m ) { |
cont_pp_mv_sf(nvl,rvl,g,&t,&u); |
cont_pp_mv_sf(nvl,rvl,g,&t,&u); |
mulp(nvl,cont,u,&t); |
mulp(nvl,cont,u,&t); |
reorderp(vl,nvl,t,r); |
reorderp(vl,nvl,t,r); |
return; |
return; |
} |
} |
} else if ( !coadj ) { |
} else if ( !coadj ) { |
/* ps[imin]/coadj == gcd ? */ |
/* ps[imin]/coadj == gcd ? */ |
if ( divtp(nvl,lps[imin],cof1,&q) ) { |
if ( divtp(nvl,lps[imin],cof1,&q) ) { |
for ( i = 0; i < m; i++ ) |
for ( i = 0; i < m; i++ ) |
if ( !divtp(nvl,lps[i],q,&t) ) |
if ( !divtp(nvl,lps[i],q,&t) ) |
break; |
break; |
if ( i == m ) { |
if ( i == m ) { |
cont_pp_mv_sf(nvl,rvl,q,&t,&u); |
cont_pp_mv_sf(nvl,rvl,q,&t,&u); |
mulp(nvl,cont,u,&t); |
mulp(nvl,cont,u,&t); |
reorderp(vl,nvl,t,r); |
reorderp(vl,nvl,t,r); |
return; |
return; |
} |
} |
} |
} |
} |
} |
addp(nvl,g,adj,&t); g = t; |
addp(nvl,g,adj,&t); g = t; |
addp(nvl,cof1,coadj,&t); cof1 = t; |
addp(nvl,cof1,coadj,&t); cof1 = t; |
subp(nvl,x,s,&t); mulp(nvl,mod,t,&u); mod = u; |
subp(nvl,x,s,&t); mulp(nvl,mod,t,&u); mod = u; |
hm = he; |
hm = he; |
} else { |
} else { |
d1 = homdeg(hm); d2 = homdeg(he); |
d1 = homdeg(hm); d2 = homdeg(he); |
if ( d1 < d2 ) /* we use current hm */ |
if ( d1 < d2 ) /* we use current hm */ |
continue; |
continue; |
else if ( d1 > d2 ) { |
else if ( d1 > d2 ) { |
/* use he */ |
/* use he */ |
g = ge; |
g = ge; |
cof1 = cof1e; |
cof1 = cof1e; |
hm = he; |
hm = he; |
subp(nvl,x,s,&mod); |
subp(nvl,x,s,&mod); |
} else { |
} else { |
/* d1==d2, but hm!=he => both are unlucky */ |
/* d1==d2, but hm!=he => both are unlucky */ |
g = 0; |
g = 0; |
cof1 = 0; |
cof1 = 0; |
itogfs(1,&mod); |
itogfs(1,&mod); |
} |
} |
} |
} |
} |
} |
} |
} |
} |
} |
|
|
void head_monomial(V v,P p,P *coef,P *term) |
void head_monomial(VL vl,V v,P p,P *coef,P *term) |
{ |
{ |
P t,s,u; |
P t,s,u; |
DCP dc; |
DCP dc; |
GFS one; |
GFS one; |
VL vl; |
|
|
|
itogfs(1,&one); |
itogfs(1,&one); |
t = (P)one; |
t = (P)one; |
while ( 1 ) { |
while ( 1 ) { |
if ( NUM(p) || VR(p) == v ) { |
if ( NUM(p) || VR(p) == v ) { |
*coef = p; |
*coef = p; |
*term = t; |
*term = t; |
return; |
return; |
} else { |
} else { |
NEWDC(dc); |
NEWDC(dc); |
COEF(dc) = (P)one; DEG(dc) = DEG(DC(p)); |
COEF(dc) = (P)one; DEG(dc) = DEG(DC(p)); |
MKP(VR(p),dc,s); |
MKP(VR(p),dc,s); |
mulp(vl,t,s,&u); t = u; |
mulp(vl,t,s,&u); t = u; |
p = COEF(DC(p)); |
p = COEF(DC(p)); |
} |
} |
} |
} |
} |
} |
|
|
void cont_pp_mv_sf(VL vl,VL rvl,P p,P *c,P *pp) |
void cont_pp_mv_sf(VL vl,VL rvl,P p,P *c,P *pp) |
{ |
{ |
DP dp; |
DP dp; |
MP t; |
MP t; |
int i,m; |
int i,m; |
P *ps; |
P *ps; |
|
struct order_spec *spec, *currentspec; |
|
extern struct order_spec *dp_current_spec; |
|
|
ptod(vl,rvl,p,&dp); |
currentspec = dp_current_spec; |
for ( t = BDY(dp), m = 0; t; t = NEXT(t), m++ ); |
create_order_spec(0,0,&spec); |
ps = (P *)ALLOCA(m*sizeof(P)); |
initd(spec); |
for ( t = BDY(dp), i = 0; t; t = NEXT(t), i++ ) |
ptod(vl,rvl,p,&dp); |
ps[i] = C(t); |
for ( t = BDY(dp), m = 0; t; t = NEXT(t), m++ ); |
ugcdsf(ps,m,c); |
ps = (P *)ALLOCA(m*sizeof(P)); |
divsp(vl,p,*c,pp); |
for ( t = BDY(dp), i = 0; t; t = NEXT(t), i++ ) |
|
ps[i] = C(t); |
|
gcdsf(vl,ps,m,c); |
|
divsp(vl,p,*c,pp); |
|
initd(currentspec); |
} |
} |
|
|
void mfctrsf(VL vl, P f, DCP *dcp) |
void mfctrsf(VL vl, P f, DCP *dcp) |
{ |
{ |
DCP dc0,dc,dct,dcs,dcr; |
DCP dc0,dc,dct,dcs,dcr; |
Obj obj; |
Obj obj; |
|
|
simp_ff((Obj)f,&obj); f = (P)obj; |
simp_ff((Obj)f,&obj); f = (P)obj; |
sqfrsf(vl,f,&dct); |
sqfrsf(vl,f,&dct); |
dc = dc0 = dct; dct = NEXT(dct); NEXT(dc) = 0; |
dc = dc0 = dct; dct = NEXT(dct); NEXT(dc) = 0; |
for ( ; dct; dct = NEXT(dct) ) { |
for ( ; dct; dct = NEXT(dct) ) { |
mfctrsfmain(vl,COEF(dct),&dcs); |
mfctrsfmain(vl,COEF(dct),&dcs); |
for ( dcr = dcs; dcr; dcr = NEXT(dcr) ) |
for ( dcr = dcs; dcr; dcr = NEXT(dcr) ) |
DEG(dcr) = DEG(dct); |
DEG(dcr) = DEG(dct); |
for ( ; NEXT(dc); dc = NEXT(dc) ); |
for ( ; NEXT(dc); dc = NEXT(dc) ); |
NEXT(dc) = dcs; |
NEXT(dc) = dcs; |
} |
} |
*dcp = dc0; |
*dcp = dc0; |
} |
} |
|
|
/* f : sqfr, non const */ |
/* f : sqfr, non const */ |
|
|
void mfctrsfmain(VL vl, P f, DCP *dcp) |
void mfctrsfmain(VL vl, P f, DCP *dcp) |
{ |
{ |
VL tvl,nvl,rvl; |
VL tvl,nvl,rvl; |
DCP dc,dc0,dc1,dc2,dct,lcfdc,dcs; |
DCP dc,dc0,dc1,dc2,dct,lcfdc,dcs; |
int imin,inext,i,j,n,k,np; |
int imin,inext,i,j,n,k,np; |
int *da; |
int *da; |
V vx,vy; |
V vx,vy; |
V *va; |
V *va; |
P *l,*tl; |
P *l,*tl; |
P gcd,g,df,dfmin; |
P gcd,g,df,dfmin; |
P pa[2]; |
P pa[2]; |
P g0,pp0,spp0,c,c0,x,y,u,v,lcf,lcu,lcv,u0,v0,t,s; |
P f0,pp0,spp0,c,c0,x,y,u,v,lcf,lcu,lcv,u0,v0,t,s; |
P ype,yme; |
P ype,yme,fin; |
GFS ev,evy; |
GFS ev,evy; |
P *fp0; |
P *fp0; |
int *mev,*win; |
int *mev,*win; |
|
|
clctv(vl,f,&tvl); vl = tvl; |
clctv(vl,f,&tvl); vl = tvl; |
if ( !vl ) |
if ( !vl ) |
error("mfctrsfmain : cannot happen"); |
error("mfctrsfmain : cannot happen"); |
if ( !NEXT(vl) ) { |
if ( !NEXT(vl) ) { |
/* univariate */ |
/* univariate */ |
ufctrsf(f,&dc); |
ufctrsf(f,&dc); |
/* remove lc */ |
/* remove lc */ |
*dcp = NEXT(dc); |
*dcp = NEXT(dc); |
return; |
return; |
} |
} |
for ( n = 0, tvl = vl; tvl; tvl = NEXT(tvl), n++ ); |
for ( n = 0, tvl = vl; tvl; tvl = NEXT(tvl), n++ ); |
va = (V *)ALLOCA(n*sizeof(int)); |
va = (V *)ALLOCA(n*sizeof(V)); |
da = (int *)ALLOCA(n*sizeof(int)); |
da = (int *)ALLOCA(n*sizeof(int)); |
/* find v s.t. diff(f,v) is nonzero and deg(f,v) is minimal */ |
/* find v s.t. diff(f,v) is nonzero and deg(f,v) is minimal */ |
imin = -1; |
imin = -1; |
for ( i = 0, tvl = vl; i < n; tvl = NEXT(tvl), i++ ) { |
for ( i = 0, tvl = vl; i < n; tvl = NEXT(tvl), i++ ) { |
va[i] = tvl->v; |
va[i] = tvl->v; |
da[i] = getdeg(va[i],f); |
da[i] = getdeg(va[i],f); |
diffp(vl,f,va[i],&df); |
diffp(vl,f,va[i],&df); |
if ( !df ) |
if ( !df ) |
continue; |
continue; |
if ( imin < 0 || da[i] < da[imin] ) { |
if ( imin < 0 || da[i] < da[imin] ) { |
dfmin = df; |
dfmin = df; |
imin = i; |
imin = i; |
} |
} |
} |
} |
/* find v1 neq v s.t. deg(f,v) is minimal */ |
/* find v1 neq v s.t. deg(f,v) is minimal */ |
inext = -1; |
inext = -1; |
for ( i = 0; i < n; i++ ) { |
for ( i = 0; i < n; i++ ) { |
if ( i == imin ) |
if ( i == imin ) |
continue; |
continue; |
if ( inext < 0 || da[i] < da[inext] ) |
if ( inext < 0 || da[i] < da[inext] ) |
inext = i; |
inext = i; |
} |
} |
pa[0] = f; |
pa[0] = f; |
pa[1] = dfmin; |
pa[1] = dfmin; |
gcdsf_main(vl,pa,2,&gcd); |
gcdsf(vl,pa,2,&gcd); |
if ( !NUM(gcd) ) { |
if ( !NUM(gcd) ) { |
/* f = gcd * f/gcd */ |
/* f = gcd * f/gcd */ |
mfctrsfmain(vl,gcd,&dc1); |
mfctrsfmain(vl,gcd,&dc1); |
divsp(vl,f,gcd,&g); |
divsp(vl,f,gcd,&g); |
mfctrsfmain(vl,g,&dc2); |
mfctrsfmain(vl,g,&dc2); |
for ( dct = dc1; NEXT(dct); dct = NEXT(dct) ); |
for ( dct = dc1; NEXT(dct); dct = NEXT(dct) ); |
NEXT(dct) = dc2; |
NEXT(dct) = dc2; |
*dcp = dc1; |
*dcp = dc1; |
return; |
return; |
} |
} |
/* create vl s.t. vl[0] = va[imin], vl[1] = va[inext] */ |
/* create vl s.t. vl[0] = va[imin], vl[1] = va[inext] */ |
nvl = 0; |
nvl = 0; |
NEXTVL(nvl,tvl); tvl->v = va[imin]; |
NEXTVL(nvl,tvl); tvl->v = va[imin]; |
NEXTVL(nvl,tvl); tvl->v = va[inext]; |
NEXTVL(nvl,tvl); tvl->v = va[inext]; |
for ( i = 0; i < n; i++ ) { |
for ( i = 0; i < n; i++ ) { |
if ( i == imin || i == inext ) |
if ( i == imin || i == inext ) |
continue; |
continue; |
NEXTVL(nvl,tvl); tvl->v = va[i]; |
NEXTVL(nvl,tvl); tvl->v = va[i]; |
} |
} |
NEXT(tvl) = 0; |
NEXT(tvl) = 0; |
|
|
reorderp(nvl,vl,f,&g); |
fin = f; |
vx = nvl->v; |
reorderp(nvl,vl,f,&g); f = g; |
vy = NEXT(nvl)->v; |
vx = nvl->v; |
MKV(vx,x); |
vy = NEXT(nvl)->v; |
MKV(vy,y); |
MKV(vx,x); |
/* remaining variables */ |
MKV(vy,y); |
rvl = NEXT(NEXT(nvl)); |
/* remaining variables */ |
if ( !rvl ) { |
rvl = NEXT(NEXT(nvl)); |
/* bivariate */ |
if ( !rvl ) { |
sfbfctr(g,vx,vy,getdeg(vx,g),&dc1); |
/* bivariate */ |
for ( dc0 = 0; dc1; dc1 = NEXT(dc1) ) { |
sfbfctr(f,vx,vy,getdeg(vx,f),&dc1); |
NEXTDC(dc0,dc); |
for ( dc0 = 0; dc1; dc1 = NEXT(dc1) ) { |
DEG(dc) = ONE; |
NEXTDC(dc0,dc); |
reorderp(vl,nvl,COEF(dc1),&COEF(dc)); |
DEG(dc) = ONE; |
} |
reorderp(vl,nvl,COEF(dc1),&COEF(dc)); |
NEXT(dc) = 0; |
} |
*dcp = dc0; |
NEXT(dc) = 0; |
return; |
*dcp = dc0; |
} |
return; |
/* n >= 3; nvl = (vx,vy,X) */ |
} |
/* find good evaluation pt for X */ |
/* n >= 3; nvl = (vx,vy,X) */ |
mev = (int *)CALLOC(n-2,sizeof(int)); |
/* find good evaluation pt for X */ |
while ( 1 ) { |
mev = (int *)CALLOC(n-2,sizeof(int)); |
substvp_sf(nvl,rvl,g,mev,&g0); |
while ( 1 ) { |
pa[0] = g0; |
/* lcf(mev)=0 => invalid */ |
diffp(nvl,g0,vx,&pa[1]); |
substvp_sf(nvl,rvl,COEF(DC(f)),mev,&t); |
if ( pa[1] ) { |
if ( t ) { |
gcdsf(nvl,pa,2,&gcd); |
substvp_sf(nvl,rvl,f,mev,&f0); |
/* XXX maybe we have to accept the case where gcd is a poly of y */ |
pa[0] = f0; |
if ( NUM(gcd) ) |
diffp(nvl,f0,vx,&pa[1]); |
break; |
if ( pa[1] ) { |
} |
gcdsf(nvl,pa,2,&gcd); |
/* XXX if generated indices exceed q of GF(q) => error in indextogfs */ |
/* XXX maybe we have to accept the case where gcd is a poly of y */ |
next_evaluation_point(mev,n-2); |
if ( NUM(gcd) ) |
} |
break; |
/* g0 = g(x,y,mev) */ |
} |
/* separate content; g0 may have the content wrt x */ |
} |
cont_pp_sfp(nvl,g0,&c0,&pp0); |
/* XXX if generated indices exceed q of GF(q) => error in indextogfs */ |
|
next_evaluation_point(mev,n-2); |
|
} |
|
/* f0 = f(x,y,mev) */ |
|
/* separate content; f0 may have the content wrt x */ |
|
cont_pp_sfp(nvl,f0,&c0,&pp0); |
|
|
/* factorize pp0; pp0 = pp0(x,y+evy) = prod dc */ |
/* factorize pp0; pp0 = pp0(x,y+evy) = prod dc */ |
sfbfctr_shift(pp0,vx,vy,getdeg(vx,pp0),&evy,&spp0,&dc); pp0 = spp0; |
sfbfctr_shift(pp0,vx,vy,getdeg(vx,pp0),&evy,&spp0,&dc); pp0 = spp0; |
|
|
if ( !NEXT(dc) ) { |
if ( !NEXT(dc) ) { |
/* f is irreducible */ |
/* f is irreducible */ |
NEWDC(dc); DEG(dc) = ONE; COEF(dc) = f; NEXT(dc) = 0; |
NEWDC(dc); DEG(dc) = ONE; COEF(dc) = fin; NEXT(dc) = 0; |
*dcp = dc; |
*dcp = dc; |
return; |
return; |
} |
} |
/* ype = y+evy, yme = y-evy */ |
/* ype = y+evy, yme = y-evy */ |
addp(nvl,y,(P)evy,&ype); subp(nvl,y,(P)evy,&yme); |
addp(nvl,y,(P)evy,&ype); subp(nvl,y,(P)evy,&yme); |
|
|
/* shift c0; c0 <- c0(y+evy) */ |
/* shift c0; c0 <- c0(y+evy) */ |
substp(nvl,c0,vy,ype,&s); c0 = s; |
substp(nvl,c0,vy,ype,&s); c0 = s; |
|
|
/* shift f; f <- f(y+evy) */ |
/* shift f; f <- f(y+evy) */ |
substp(nvl,f,vy,ype,&s); f = s; |
substp(nvl,f,vy,ype,&s); f = s; |
|
|
/* now f(x,0,mev) = c0 * prod dc */ |
/* now f(x,0,mev) = c0 * prod dc */ |
|
|
/* factorize lc_x(f) */ |
/* factorize lc_x(f) */ |
lcf = COEF(DC(f)); |
lcf = COEF(DC(f)); |
mfctrsf(nvl,lcf,&dct); |
mfctrsf(nvl,lcf,&dct); |
/* skip the first element (= a number) */ |
/* skip the first element (= a number) */ |
dct = NEXT(dct); |
lcfdc = NEXT(dct); |
|
|
/* shift lcfdc; c <- c(X+mev) */ |
/* np = number of bivariate factors */ |
for ( lcfdc = 0; dct; dct = NEXT(dct) ) { |
for ( np = 0, dct = dc; dct; dct = NEXT(dct), np++ ); |
NEXTDC(lcfdc,dcs); |
fp0 = (P *)ALLOCA((np+1)*sizeof(P)); |
DEG(dcs) = DEG(dct); |
for ( i = 0, dct = dc; i < np; dct = NEXT(dct), i++ ) |
shift_sf(nvl,rvl,COEF(dct),mev,1,&COEF(dcs)); |
fp0[i] = COEF(dct); |
} |
fp0[np] = 0; |
NEXT(dcs) = 0; |
l = tl = (P *)ALLOCA((np+1)*sizeof(P)); |
|
win = W_ALLOC(np+1); |
|
|
/* np = number of bivariate factors */ |
for ( k = 1, win[0] = 1, --np; ; ) { |
for ( np = 0, dct = dc; dct; dct = NEXT(dct), np++ ); |
itogfs(1,&u0); |
fp0 = (P *)ALLOCA((np+1)*sizeof(P)); |
/* u0 = product of selected factors */ |
for ( i = 0, dct = dc; i < np; dct = NEXT(dct), i++ ) |
for ( i = 0; i < k; i++ ) { |
fp0[i] = COEF(dct); |
mulp(nvl,u0,fp0[win[i]],&t); u0 = t; |
fp0[np] = 0; |
} |
l = tl = (P *)ALLOCA((np+1)*sizeof(P)); |
/* we have to consider the content */ |
win = W_ALLOC(np+1); |
/* f0 = c0*u0*v0 */ |
|
mulp(nvl,LC(u0),c0,&c); estimatelc_sf(nvl,rvl,c,lcfdc,mev,&lcu); |
|
divsp(nvl,pp0,u0,&v0); |
|
mulp(nvl,LC(v0),c0,&c); estimatelc_sf(nvl,rvl,c,lcfdc,mev,&lcv); |
|
mfctrsf_hensel(nvl,rvl,f,pp0,u0,v0,lcu,lcv,mev,&u); |
|
if ( u ) { |
|
/* save the factor */ |
|
reorderp(vl,nvl,u,&t); |
|
/* y -> y-evy */ |
|
substp(vl,t,vy,yme,tl++); |
|
|
/* f <- f(X+mev) */ |
/* update f,pp0 */ |
shift_sf(nvl,rvl,f,mev,1,&s); f = s; |
divsp(nvl,f,u,&t); f = t; |
|
divsp(nvl,pp0,u0,&t); pp0 = t; |
for ( k = 1, win[0] = 1, --np; ; ) { |
/* update win, fp0 */ |
itogfs(1,&u0); |
for ( i = 0; i < k-1; i++ ) |
/* u0 = product of selected factors */ |
for ( j = win[i]+1; j < win[i+1]; j++ ) |
for ( i = 0; i < k; i++ ) { |
fp0[j-i-1] = fp0[j]; |
mulp(nvl,u0,fp0[win[i]],&t); u0 = t; |
for ( j = win[k-1]+1; j <= np; j++ ) |
} |
fp0[j-k] = fp0[j]; |
/* we have to consider the content */ |
if ( ( np -= k ) < k ) break; |
/* g0 = c0*u0*v0 */ |
if ( np-win[0]+1 < k ) |
mulp(nvl,LC(u0),c0,&c); estimatelc_sf(nvl,rvl,c,lcfdc,&lcu); |
if ( ++k <= np ) { |
divsp(nvl,pp0,u0,&v0); |
for ( i = 0; i < k; i++ ) |
mulp(nvl,LC(v0),c0,&c); estimatelc_sf(nvl,rvl,c,lcfdc,&lcv); |
win[i] = i + 1; |
mfctrsf_hensel(nvl,rvl,f,pp0,u0,v0,lcu,lcv,&u); |
continue; |
if ( u ) { |
} else |
/* save the factor */ |
break; |
reorderp(vl,nvl,u,&t); |
else |
/* x -> x-mev, y -> y-evy */ |
for ( i = 1; i < k; i++ ) |
shift_sf(vl,rvl,t,mev,-1,&s); substp(vl,s,vy,yme,tl++); |
win[i] = win[0] + i; |
|
} else { |
/* update f,pp0 */ |
if ( ncombi(1,np,k,win) == 0 ) |
divsp(nvl,f,u,&t); f = t; |
if ( k == np ) break; |
divsp(nvl,pp0,u0,&t); pp0 = t; |
else |
/* update win, fp0 */ |
for ( i = 0, ++k; i < k; i++ ) |
for ( i = 0; i < k-1; i++ ) |
win[i] = i + 1; |
for ( j = win[i]+1; j < win[i+1]; j++ ) |
} |
fp0[j-i-1] = fp0[j]; |
} |
for ( j = win[k-1]+1; j <= np; j++ ) |
reorderp(vl,nvl,f,&t); |
fp0[j-k] = fp0[j]; |
/* y -> y-evy */ |
if ( ( np -= k ) < k ) break; |
substp(vl,t,vy,yme,tl++); |
if ( np-win[0]+1 < k ) |
*tl = 0; |
if ( ++k <= np ) { |
for ( dc0 = 0, i = 0; l[i]; i++ ) { |
for ( i = 0; i < k; i++ ) |
NEXTDC(dc0,dc); DEG(dc) = ONE; COEF(dc) = l[i]; |
win[i] = i + 1; |
} |
continue; |
NEXT(dc) = 0; *dcp = dc0; |
} else |
|
break; |
|
else |
|
for ( i = 1; i < k; i++ ) |
|
win[i] = win[0] + i; |
|
} else { |
|
if ( ncombi(1,np,k,win) == 0 ) |
|
if ( k == np ) break; |
|
else |
|
for ( i = 0, ++k; i < k; i++ ) |
|
win[i] = i + 1; |
|
} |
|
reorderp(vl,nvl,f,&t); |
|
/* x -> x-mev, y -> y-evy */ |
|
shift_sf(vl,rvl,t,mev,-1,&s); substp(vl,s,vy,yme,tl++); |
|
*tl = 0; |
|
|
|
for ( dc0 = 0, i = 0; l[i]; i++ ) { |
|
NEXTDC(dc0,dc); DEG(dc) = ONE; COEF(dc) = l[i]; |
|
} |
|
NEXT(dc) = 0; *dcp = dc0; |
|
} |
|
} |
} |
|
|
void next_evaluation_point(int *e,int n) |
void next_evaluation_point(int *e,int n) |
{ |
{ |
int i,t,j; |
int i,t,j; |
|
|
for ( i = n-1; i >= 0; i-- ) |
for ( i = n-1; i >= 0; i-- ) |
if ( e[i] ) break; |
if ( e[i] ) break; |
if ( i < 0 ) e[n-1] = 1; |
if ( i < 0 ) e[n-1] = 1; |
else if ( i == 0 ) { |
else if ( i == 0 ) { |
t = e[0]; e[0] = 0; e[n-1] = t+1; |
t = e[0]; e[0] = 0; e[n-1] = t+1; |
} else { |
} else { |
e[i-1]++; t = e[i]; |
e[i-1]++; t = e[i]; |
for ( j = i; j < n-1; j++ ) |
for ( j = i; j < n-1; j++ ) |
e[j] = 0; |
e[j] = 0; |
e[n-1] = t-1; |
e[n-1] = t-1; |
} |
} |
} |
} |
|
|
/* |
/* |
* dc : f1^E1*...*fk^Ek |
* dc : f1^E1*...*fk^Ek |
* find e1,...,ek s.t. fi(0)^ei | c |
* find e1,...,ek s.t. fi(mev)^ei | c |
* and return f1^e1*...*fk^ek |
* and return f1^e1*...*fk^ek |
* vl = (vx,vy,rvl) |
* vl = (vx,vy,rvl) |
*/ |
*/ |
|
|
void estimatelc_sf(VL vl,VL rvl,P c,DCP dc,P *lcp) |
void estimatelc_sf(VL vl,VL rvl,P c,DCP dc,int *mev,P *lcp) |
{ |
{ |
DCP dct; |
DCP dct; |
P r,c1,c2,t,s,f; |
P r,c1,c2,t,s,f; |
int i,d; |
int i,d; |
Q q; |
Q q; |
|
|
for ( dct = dc, r = (P)ONE; dct; dct = NEXT(dct) ) { |
for ( dct = dc, r = (P)ONE; dct; dct = NEXT(dct) ) { |
if ( NUM(COEF(dct)) ) |
if ( NUM(COEF(dct)) ) |
continue; |
continue; |
/* constant part */ |
/* constant part */ |
substvp_sf(vl,rvl,COEF(dct),0,&f); |
substvp_sf(vl,rvl,COEF(dct),mev,&f); |
d = QTOS(DEG(dct)); |
d = QTOS(DEG(dct)); |
for ( i = 0, c1 = c; i < d; i++ ) |
for ( i = 0, c1 = c; i < d; i++ ) |
if ( !divtp(vl,c1,f,&c2) ) |
if ( !divtp(vl,c1,f,&c2) ) |
break; |
break; |
else |
else |
c1 = c2; |
c1 = c2; |
if ( i ) { |
if ( i ) { |
STOQ(i,q); |
STOQ(i,q); |
pwrp(vl,COEF(dct),q,&s); mulp(vl,r,s,&t); r = t; |
pwrp(vl,COEF(dct),q,&s); mulp(vl,r,s,&t); r = t; |
} |
} |
} |
} |
*lcp = r; |
*lcp = r; |
} |
} |
|
|
void substvp_sf(VL vl,VL rvl,P f,int *mev,P *r) |
void substvp_sf(VL vl,VL rvl,P f,int *mev,P *r) |
{ |
{ |
int i; |
int i; |
VL tvl; |
VL tvl; |
P g,t; |
P g,t; |
GFS ev; |
GFS ev; |
|
|
for ( g = f, i = 0, tvl = rvl; tvl; tvl = NEXT(tvl), i++ ) { |
for ( g = f, i = 0, tvl = rvl; tvl; tvl = NEXT(tvl), i++ ) { |
if ( !mev ) |
if ( !mev ) |
ev = 0; |
ev = 0; |
else |
else |
indextogfs(mev[i],&ev); |
indextogfs(mev[i],&ev); |
substp(vl,g,tvl->v,(P)ev,&t); g = t; |
substp(vl,g,tvl->v,(P)ev,&t); g = t; |
} |
} |
*r = g; |
*r = g; |
} |
} |
|
|
/* |
/* |
Line 790 void substvp_sf(VL vl,VL rvl,P f,int *mev,P *r) |
|
Line 816 void substvp_sf(VL vl,VL rvl,P f,int *mev,P *r) |
|
|
|
void shift_sf(VL vl, VL rvl, P f, int *mev, int sgn, P *r) |
void shift_sf(VL vl, VL rvl, P f, int *mev, int sgn, P *r) |
{ |
{ |
VL tvl; |
VL tvl; |
int i; |
int i; |
P x,g,t,s; |
P x,g,t,s; |
GFS ev; |
GFS ev; |
|
|
for ( g = f, tvl = rvl, i = 0; tvl; tvl = NEXT(tvl), i++ ) { |
for ( g = f, tvl = rvl, i = 0; tvl; tvl = NEXT(tvl), i++ ) { |
if ( !mev[i] ) |
if ( !mev[i] ) |
continue; |
continue; |
indextogfs(mev[i],&ev); |
indextogfs(mev[i],&ev); |
MKV(tvl->v,x); |
MKV(tvl->v,x); |
if ( sgn > 0 ) |
if ( sgn > 0 ) |
addp(vl,x,(P)ev,&t); |
addp(vl,x,(P)ev,&t); |
else |
else |
subp(vl,x,(P)ev,&t); |
subp(vl,x,(P)ev,&t); |
substp(vl,g,tvl->v,t,&s); g = s; |
substp(vl,g,tvl->v,t,&s); g = s; |
} |
} |
*r = g; |
*r = g; |
} |
} |
|
|
/* |
/* |
* pp(f(0)) = u0*v0 |
* pp(f(0)) = u0*v0 |
*/ |
*/ |
|
|
void mfctrsf_hensel(VL vl,VL rvl,P f,P pp0,P u0,P v0,P lcu,P lcv,P *up) |
void mfctrsf_hensel(VL vl,VL rvl,P f,P pp0,P u0,P v0,P lcu,P lcv,int *mev,P *up) |
{ |
{ |
VL tvl,onevl; |
VL tvl,onevl; |
P t,s,w,u,v,ff,si,wu,wv,fj,cont; |
P t,s,w,u,v,ff,si,wu,wv,fj,cont; |
UM ydy; |
UM ydy; |
V vx,vy; |
V vx,vy; |
int dy,n,i,dbd,nv,j; |
int dy,n,i,dbd,nv,j; |
int *md; |
int *md; |
P *uh,*vh; |
P *uh,*vh; |
P x,du0,dv0,m,q,r; |
P x,du0,dv0,m,q,r,fin; |
P *cu,*cv; |
P *cu,*cv; |
GFSN inv; |
GFSN inv; |
|
|
/* adjust coeffs */ |
/* check the validity of lc's and adjust coeffs */ |
/* u0 = am x^m+ ... -> lcu*x^m + a(m-1)*(lcu(0)/am)*x^(m-1)+... */ |
/* f -> lcu*lcv*x^(m+l)+... */ |
/* v0 = bm x^l+ ... -> lcv*x^l + b(l-1)*(lcv(0)/bl)*x^(l-1)+... */ |
mulp(vl,lcu,lcv,&t); |
adjust_coef_sf(vl,rvl,lcu,u0,&u); |
if ( !divtp(vl,t,LC(f),&m) ) { |
adjust_coef_sf(vl,rvl,lcv,v0,&v); |
*up = 0; return; |
vx = vl->v; vy = NEXT(vl)->v; |
} |
n = getdeg(vx,f); |
mulp(vl,m,f,&t); f = t; |
dy = getdeg(vy,f)+1; |
/* u0 = am x^m+ ... -> lcu*x^m + a(m-1)*(lcu(mev)/am)*x^(m-1)+... */ |
MKV(vx,x); |
/* v0 = bm x^l+ ... -> lcv*x^l + b(l-1)*(lcv(mev)/bl)*x^(l-1)+... */ |
cu = (P *)ALLOCA((n+1)*sizeof(P)); |
adjust_coef_sf(vl,rvl,lcu,u0,mev,&u); |
cv = (P *)ALLOCA((n+1)*sizeof(P)); |
adjust_coef_sf(vl,rvl,lcv,v0,mev,&v); |
|
|
/* ydy = y^dy */ |
/* f <- f(X+mev), u <- u(X+mev), v <- v(X+mev) */ |
ydy = C_UMALLOC(dy); COEF(ydy)[dy] = 1; |
fin = f; |
setmod_gfsn(ydy); |
shift_sf(vl,rvl,f,mev,1,&s); f = s; |
|
shift_sf(vl,rvl,u,mev,1,&s); u = s; |
|
shift_sf(vl,rvl,v,mev,1,&s); v = s; |
|
|
/* (R[y]/(y^dy))[x,X] */ |
vx = vl->v; vy = NEXT(vl)->v; |
poly_to_gfsn_poly(vl,f,vy,&t); ff = t; |
n = getdeg(vx,f); |
poly_to_gfsn_poly(vl,u,vy,&t); u = t; |
dy = getdeg(vy,f)+1; |
poly_to_gfsn_poly(vl,v,vy,&t); v = t; |
MKV(vx,x); |
substvp_sf(vl,rvl,u,0,&u0); |
cu = (P *)ALLOCA((n+1)*sizeof(P)); |
substvp_sf(vl,rvl,v,0,&v0); |
cv = (P *)ALLOCA((n+1)*sizeof(P)); |
|
|
/* compute a(x,y), b(x,y) s.t. a*u0+b*v0 = 1 mod y^dy */ |
/* ydy = y^dy */ |
extended_gcd_modyk(u0,v0,&cu[0],&cv[0]); |
ydy = C_UMALLOC(dy); DEG(ydy) = dy; COEF(ydy)[dy] = _onesf(); |
|
setmod_gfsn(ydy); |
|
|
/* du0 = LC(u0)^(-1)*u0 mod y^dy */ |
/* (R[y]/(y^dy))[x,X] */ |
/* dv0 = LC(v0)^(-1)*v0 mod y^dy */ |
poly_to_gfsn_poly(vl,f,vy,&ff); |
invgfsn((GFSN)LC(u0),&inv); mulp(vl,u0,(P)inv,&du0); |
poly_to_gfsn_poly(vl,u,vy,&t); u = t; |
invgfsn((GFSN)LC(v0),&inv); mulp(vl,v0,(P)inv,&dv0); |
poly_to_gfsn_poly(vl,v,vy,&t); v = t; |
|
substvp_sf(vl,rvl,u,0,&u0); |
|
substvp_sf(vl,rvl,v,0,&v0); |
|
|
/* cu[i]*u0+cv[i]*v0 = x^i mod y^dy */ |
/* compute a(x,y), b(x,y) s.t. a*u0+b*v0 = 1 mod y^dy */ |
for ( i = 1; i <= n; i++ ) { |
extended_gcd_modyk(u0,v0,vx,vy,dy,&cu[0],&cv[0]); |
mulp(vl,x,cu[i-1],&m); divsrp(vl,m,dv0,&q,&cu[i]); |
|
mulp(vl,x,cv[i-1],&m); divsrp(vl,m,du0,&q,&cv[i]); |
|
} |
|
dbd = dbound(vx,f)+1; |
|
|
|
/* extract homogeneous parts */ |
/* dv0 = LC(v0)^(-1)*v0 mod y^dy */ |
W_CALLOC(dbd,P,uh); W_CALLOC(dbd,P,vh); |
invgfsn((GFSN)LC(v0),&inv); mulp(vl,v0,(P)inv,&dv0); |
for ( i = 0; i <= dbd; i++ ) { |
|
exthpc(vl,vx,u,i,&uh[i]); exthpc(vl,vx,v,i,&vh[i]); |
|
} |
|
|
|
/* register degrees in each variables */ |
/* cu[i]*u0+cv[i]*v0 = x^i mod y^dy */ |
for ( nv = 0, tvl = rvl; tvl; tvl = NEXT(tvl), nv++ ); |
/* (x*cu[i])*u0+(x*cv[i])*v0 = x^(i+1) */ |
md = (int *)ALLOCA(nv*sizeof(int)); |
/* x*cu[i] = q*dv0+r => cu[i+1] = r */ |
for ( i = 0, tvl = rvl; i < nv; tvl = NEXT(tvl), i++ ) |
/* cv[i+1]*v0 = x*cv[i]*v0+q*u0*dv0 = (x*cv[i]+q*u0*inv)*v0 */ |
md[i] = getdeg(tvl->v,ff); |
for ( i = 1; i <= n; i++ ) { |
|
mulp(vl,x,cu[i-1],&m); divsrp(vl,m,dv0,&q,&cu[i]); |
|
mulp(vl,x,cv[i-1],&m); mulp(vl,q,(P)inv,&t); |
|
mulp(vl,t,u0,&s); |
|
addp(vl,m,s,&cv[i]); |
|
} |
|
|
/* XXX for removing content of factor wrt vx */ |
#if 0 |
NEWVL(onevl); onevl->v = vx; NEXT(onevl) = 0; |
/* XXX : check */ |
|
for ( i = 0; i <= n; i++ ) { |
|
mulp(vl,cu[i],u0,&m); mulp(vl,cv[i],v0,&s); |
|
addp(vl,m,s,&w); |
|
printexpr(vl,w); |
|
fprintf(asir_out,"\n"); |
|
} |
|
#endif |
|
|
for ( j = 1; j <= dbd; j++ ) { |
dbd = dbound(vx,f)+1; |
for ( i = 0, tvl = rvl; i < nv; tvl = NEXT(tvl), i++ ) |
|
if ( getdeg(tvl->v,u)+getdeg(tvl->v,v) > md[i] ) { |
/* extract homogeneous parts */ |
*up = 0; |
W_CALLOC(dbd,P,uh); W_CALLOC(dbd,P,vh); |
return; |
for ( i = 0; i <= dbd; i++ ) { |
} |
exthpc(vl,vx,u,i,&uh[i]); exthpc(vl,vx,v,i,&vh[i]); |
for ( i = 0, t = 0; i <= j; i++ ) { |
} |
mulp(vl,uh[i],vh[j-i],&s); addp(vl,s,t,&w); t = w; |
|
} |
/* register degrees in each variables */ |
/* s = degree j part of (f-uv) */ |
for ( nv = 0, tvl = rvl; tvl; tvl = NEXT(tvl), nv++ ); |
exthpc(vl,vx,ff,j,&fj); subp(vl,fj,t,&s); |
md = (int *)ALLOCA(nv*sizeof(int)); |
for ( i = 0, wu = 0, wv = 0; i <= n; i++ ) { |
for ( i = 0, tvl = rvl; i < nv; tvl = NEXT(tvl), i++ ) |
if ( s ) |
md[i] = getdeg(tvl->v,f); |
si = 0; |
|
else if ( VR(s) == vx ) |
/* XXX for removing content of factor wrt vx */ |
coefp(s,i,&si); |
NEWVL(onevl); onevl->v = vx; NEXT(onevl) = 0; |
else if ( i == 0 ) |
|
si = s; |
for ( j = 1; j <= dbd; j++ ) { |
else |
for ( i = 0, tvl = rvl; i < nv; tvl = NEXT(tvl), i++ ) |
si = 0; |
if ( getdeg(tvl->v,u)+getdeg(tvl->v,v) > md[i] ) { |
if ( si ) { |
*up = 0; |
mulp(vl,si,cu[i],&m); addp(vl,wu,m,&t); wu = t; |
return; |
mulp(vl,si,cv[i],&m); addp(vl,wv,m,&t); wv = t; |
} |
} |
for ( i = 0, t = 0; i <= j; i++ ) { |
} |
mulp(vl,uh[i],vh[j-i],&s); addp(vl,s,t,&w); t = w; |
if ( !wu ) { |
} |
gfsn_poly_to_poly(vl,u,vy,&t); u = t; |
|
if ( divtp(vl,f,u,&q) ) { |
/* s = degree j part of (f-uv) */ |
cont_pp_mv_sf(vl,onevl,u,&cont,up); |
exthpc(vl,vx,ff,j,&fj); subp(vl,fj,t,&s); |
return; |
for ( i = 0, wu = 0, wv = 0; i <= n; i++ ) { |
} |
if ( !s ) |
} |
si = 0; |
if ( !wv ) { |
else if ( VR(s) == vx ) |
gfsn_poly_to_poly(vl,v,vy,&t); v = t; |
coefp(s,i,&si); |
if ( divtp(vl,f,u,&q) ) { |
else if ( i == 0 ) |
cont_pp_mv_sf(vl,onevl,q,&cont,up); |
si = s; |
return; |
else |
} |
si = 0; |
} |
if ( si ) { |
addp(vl,u,wu,&t); u = t; |
mulp(vl,si,cv[i],&m); addp(vl,wu,m,&t); wu = t; |
addp(vl,uh[j],wu,&t); uh[j] = t; |
mulp(vl,si,cu[i],&m); addp(vl,wv,m,&t); wv = t; |
addp(vl,v,wv,&t); v = t; |
} |
addp(vl,vh[j],wv,&t); vh[j] = t; |
} |
} |
if ( !wu ) { |
|
gfsn_poly_to_poly(vl,u,vy,&t); |
|
shift_sf(vl,rvl,t,mev,-1,&s); |
|
if ( divtp(vl,fin,s,&q) ) { |
|
cont_pp_mv_sf(vl,onevl,s,&cont,up); |
|
return; |
|
} |
|
} |
|
if ( !wv ) { |
|
gfsn_poly_to_poly(vl,v,vy,&t); |
|
shift_sf(vl,rvl,t,mev,-1,&s); |
|
if ( divtp(vl,fin,s,&q) ) { |
|
cont_pp_mv_sf(vl,onevl,q,&cont,up); |
|
return; |
|
} |
|
} |
|
addp(vl,u,wu,&t); u = t; |
|
addp(vl,uh[j],wu,&t); uh[j] = t; |
|
addp(vl,v,wv,&t); v = t; |
|
addp(vl,vh[j],wv,&t); vh[j] = t; |
|
} |
|
gfsn_poly_to_poly(vl,u,vy,&t); |
|
shift_sf(vl,rvl,t,mev,-1,&s); |
|
if ( divtp(vl,fin,s,&q) ) |
|
cont_pp_mv_sf(vl,onevl,s,&cont,up); |
|
else |
|
*up = 0; |
} |
} |
|
|
void adjust_coef_sf(VL vl,VL rvl,P lcu,P u0,P *r) |
void adjust_coef_sf(VL vl,VL rvl,P lcu,P u0,int *mev,P *r) |
{ |
{ |
P lcu0,cu; |
P lcu0,cu; |
DCP dc0,dcu,dc; |
DCP dc0,dcu,dc; |
|
|
substvp_sf(vl,rvl,lcu,0,&lcu0); |
substvp_sf(vl,rvl,lcu,mev,&lcu0); |
divsp(vl,lcu0,LC(u0),&cu); |
divsp(vl,lcu0,LC(u0),&cu); |
for ( dc0 = 0, dcu = DC(u0); dcu; dcu = NEXT(dcu) ) { |
for ( dc0 = 0, dcu = DC(u0); dcu; dcu = NEXT(dcu) ) { |
if ( !dc0 ) { |
if ( !dc0 ) { |
NEXTDC(dc0,dc); |
NEXTDC(dc0,dc); |
COEF(dc) = lcu; |
COEF(dc) = lcu; |
} else { |
} else { |
NEXTDC(dc0,dc); |
NEXTDC(dc0,dc); |
mulp(vl,cu,COEF(dcu),&COEF(dc)); |
mulp(vl,cu,COEF(dcu),&COEF(dc)); |
} |
} |
DEG(dc) = DEG(dcu); |
DEG(dc) = DEG(dcu); |
} |
} |
NEXT(dc) = 0; |
NEXT(dc) = 0; |
MKP(VR(u0),dc0,*r); |
MKP(VR(u0),dc0,*r); |
} |
} |
|
|
void extended_gcd_modyk(P u0,P v0,P *cu,P *cv) |
void extended_gcd_modyk(P u0,P v0,V x,V y,int dy,P *cu,P *cv) |
{ |
{ |
|
BM g,h,a,b; |
|
|
|
gfsn_univariate_to_sfbm(u0,dy,&g); |
|
gfsn_univariate_to_sfbm(v0,dy,&h); |
|
sfexgcd_by_hensel(g,h,dy,&a,&b); |
|
sfbm_to_gfsn_univariate(a,x,y,cu); |
|
sfbm_to_gfsn_univariate(b,x,y,cv); |
} |
} |
|
|
|
/* (F[y])[x] -> F[x][y] */ |
|
|
|
void gfsn_univariate_to_sfbm(P f,int dy,BM *r) |
|
{ |
|
int dx,d,i; |
|
BM b; |
|
UM cy; |
|
DCP dc; |
|
|
|
dx = getdeg(VR(f),f); |
|
b = BMALLOC(dx,dy); |
|
DEG(b) = dy; |
|
for ( dc = DC(f); dc; dc = NEXT(dc) ) { |
|
/* d : degree in x, cy : poly in y */ |
|
d = QTOS(DEG(dc)); |
|
cy = BDY((GFSN)COEF(dc)); |
|
for ( i = DEG(cy); i >= 0; i-- ) |
|
COEF(COEF(b)[i])[d] = COEF(cy)[i]; |
|
} |
|
for ( i = 0; i <= dy; i++ ) |
|
degum(COEF(b)[i],dx); |
|
*r = b; |
|
} |
|
|
|
void sfbm_to_gfsn_univariate(BM f,V x,V y,P *r) |
|
{ |
|
P g; |
|
VL vl; |
|
|
|
sfbmtop(f,x,y,&g); |
|
NEWVL(vl); vl->v = x; |
|
NEWVL(NEXT(vl)); NEXT(vl)->v = y; |
|
NEXT(NEXT(vl)) = 0; |
|
poly_to_gfsn_poly(vl,g,y,r); |
|
} |
|
|
void poly_to_gfsn_poly(VL vl,P f,V v,P *r) |
void poly_to_gfsn_poly(VL vl,P f,V v,P *r) |
{ |
{ |
|
VL tvl,nvl0,nvl; |
|
P g; |
|
|
|
/* (x,y,...,v,...) -> (x,y,...,v) */ |
|
for ( nvl0 = 0, tvl = vl; tvl; tvl = NEXT(tvl) ) { |
|
if ( tvl->v != v ) { |
|
NEXTVL(nvl0,nvl); |
|
nvl->v = tvl->v; |
|
} |
|
} |
|
NEXTVL(nvl0,nvl); |
|
nvl->v = v; |
|
NEXT(nvl) = 0; |
|
reorderp(nvl0,vl,f,&g); |
|
poly_to_gfsn_poly_main(g,v,r); |
} |
} |
|
|
|
void poly_to_gfsn_poly_main(P f,V v,P *r) |
|
{ |
|
int d; |
|
UM u; |
|
GFSN g; |
|
DCP dc,dct,dc0; |
|
|
|
if ( !f ) |
|
*r = f; |
|
else if ( NUM(f) || VR(f) == v ) { |
|
d = getdeg(v,f); |
|
u = UMALLOC(d); |
|
ptosfum(f,u); |
|
MKGFSN(u,g); |
|
*r = (P)g; |
|
} else { |
|
for ( dc0 = 0, dct = DC(f); dct; dct = NEXT(dct) ) { |
|
NEXTDC(dc0,dc); |
|
DEG(dc) = DEG(dct); |
|
poly_to_gfsn_poly_main(COEF(dct),v,&COEF(dc)); |
|
} |
|
NEXT(dc) = 0; |
|
MKP(VR(f),dc0,*r); |
|
} |
|
} |
|
|
void gfsn_poly_to_poly(VL vl,P f,V v,P *r) |
void gfsn_poly_to_poly(VL vl,P f,V v,P *r) |
{ |
{ |
|
VL tvl,nvl0,nvl; |
|
P g; |
|
|
|
gfsn_poly_to_poly_main(f,v,&g); |
|
/* (x,y,...,v,...) -> (x,y,...,v) */ |
|
for ( nvl0 = 0, tvl = vl; tvl; tvl = NEXT(tvl) ) { |
|
if ( tvl->v != v ) { |
|
NEXTVL(nvl0,nvl); |
|
nvl->v = tvl->v; |
|
} |
|
} |
|
NEXTVL(nvl0,nvl); |
|
nvl->v = v; |
|
NEXT(nvl) = 0; |
|
reorderp(vl,nvl0,g,r); |
} |
} |
|
|
|
void gfsn_poly_to_poly_main(P f,V v,P *r) |
|
{ |
|
DCP dc,dc0,dct; |
|
|
|
if ( !f ) |
|
*r = f; |
|
else if ( NUM(f) ) { |
|
if ( NID((Num)f) == N_GFSN ) |
|
sfumtop(v,BDY((GFSN)f),r); |
|
else |
|
*r = f; |
|
} else { |
|
for ( dc0 = 0, dct = DC(f); dct; dct = NEXT(dct) ) { |
|
NEXTDC(dc0,dc); |
|
DEG(dc) = DEG(dct); |
|
gfsn_poly_to_poly_main(COEF(dct),v,&COEF(dc)); |
|
} |
|
NEXT(dc) = 0; |
|
MKP(VR(f),dc0,*r); |
|
} |
|
} |
|
|
|
void printsfum(UM f) |
|
{ |
|
int i; |
|
|
|
for ( i = DEG(f); i >= 0; i-- ) { |
|
printf("+("); |
|
printf("%d",IFTOF(COEF(f)[i])); |
|
printf(")*y^%d",i); |
|
} |
|
} |
|
|
|
void printsfbm(BM f) |
|
{ |
|
int i; |
|
|
|
for ( i = DEG(f); i >= 0; i-- ) { |
|
printf("+("); |
|
printsfum(COEF(f)[i]); |
|
printf(")*y^%d",i); |
|
} |
|
} |
|
|