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ratgring.h File Reference
#include "kernel/structs.h"
#include "polys/nc/nc.h"
#include "polys/monomials/p_polys.h"

Go to the source code of this file.

Functions

void pLcmRat (poly a, poly b, poly m, int rat_shift)
 
poly p_HeadRat (poly p, int ishift, ring r)
 
void p_ExpVectorDiffRat (poly pr, poly p1, poly p2, int ishift, ring r)
 
ideal ncGCD2 (poly p, poly q, ring r)
 
ideal ncGCD (poly p, poly q, ring r)
 
poly nc_rat_CreateSpoly (poly p1, poly p2, int ishift, ring r)
 
poly nc_rat_ReduceSpolyNew (poly p1, poly p2, int ishift, ring r)
 
BOOLEAN p_DivisibleByRat (poly a, poly b, int ishift, const ring r)
 
int redRat (poly *h, poly *reducer, int *red_length, int rl, int ishift, ring r)
 
static void pContentRat (poly &ph, const ring r=currRing)
 
BOOLEAN p_LmIsConstantRat (const poly p, const ring r)
 
BOOLEAN p_LmIsConstantCompRat (const poly p, const ring r)
 

Function Documentation

◆ nc_rat_CreateSpoly()

poly nc_rat_CreateSpoly ( poly  p1,
poly  p2,
int  ishift,
ring  r 
)

Definition at line 340 of file ratgring.cc.

341{
342
343 poly p1 = p_Copy(pp1,r);
344 poly p2 = p_Copy(pp2,r);
345
346 const long lCompP1 = p_GetComp(p1,r);
347 const long lCompP2 = p_GetComp(p2,r);
348
349 if ((lCompP1!=lCompP2) && (lCompP1!=0) && (lCompP2!=0))
350 {
351#ifdef PDEBUG
352 WerrorS("nc_rat_CreateSpoly: different non-zero components!");
353#endif
354 return(NULL);
355 }
356
357 if ( (p_LmIsConstantRat(p1,r)) || (p_LmIsConstantRat(p2,r)) )
358 {
359 p_Delete(&p1,r);
360 p_Delete(&p2,r);
361 return( NULL );
362 }
363
364
365/* note: prod. crit does not apply! */
366 poly pL=pOne();
367 poly m1=pOne();
368 poly m2=pOne();
369 int is = ishift; /* TODO */
370 pLcmRat(p1,p2,pL,is);
371 p_Setm(pL,r);
372#ifdef PDEBUG
373 p_Test(pL,r);
374#endif
375 poly pr1 = p_GetExp_k_n(p1,1,ishift,r); /* rat D-exp of p1 */
376 poly pr2 = p_GetExp_k_n(p2,1,ishift,r); /* rat D-exp of p2 */
377 p_ExpVectorDiff(m1,pL,pr1,r); /* purely in D part by construction */
378 p_ExpVectorDiff(m2,pL,pr2,r); /* purely in D part by construction */
379 p_Delete(&pr1,r);
380 p_Delete(&pr2,r);
381 p_Delete(&pL,r);
382#ifdef PDEBUG
383 p_Test(m1,r);
384 PrintS("d^{gamma-alpha} = "); p_wrp(m1,r); PrintLn();
385 p_Test(m2,r);
386 PrintS("d^{gamma-beta} = "); p_wrp(m2,r); PrintLn();
387#endif
388
389 poly HF = NULL;
390 HF = p_HeadRat(p1,is,r); // lm_D(f)
391 HF = nc_mm_Mult_p(m1, HF, r); // // d^{gamma-alpha} lm_D(f)
392 poly C = p_GetCoeffRat(HF, is, r); // c = lc_D(h_f) in the paper
393
394 poly HG = NULL;
395 HG = p_HeadRat(p2,is,r); // lm_D(g)
396 HG = nc_mm_Mult_p(m2, HG, r); // // d^{gamma-beta} lm_D(g)
397 poly K = p_GetCoeffRat(HG, is, r); // k = lc_D(h_g) in the paper
398
399#ifdef PDEBUG
400 PrintS("f: "); p_wrp(p1,r); PrintS("\n");
401 PrintS("c: "); p_wrp(C,r); PrintS("\n");
402 PrintS("g: "); p_wrp(p2,r); PrintS("\n");
403 PrintS("k: "); p_wrp(K,r); PrintS("\n");
404#endif
405
406 ideal ncsyz = ncGCD(C,K,r);
407 poly KK = ncsyz->m[0]; ncsyz->m[0]=NULL; //p_Copy(ncsyz->m[0],r); // k'
408 poly CC = ncsyz->m[1]; ncsyz->m[1]= NULL; //p_Copy(ncsyz->m[1],r); // c'
409 id_Delete(&ncsyz,r);
410
411 p_LmDeleteAndNextRat(&p1, is, r); // t_f
412 p_LmDeleteAndNextRat(&HF, is, r); // r_f = h_f - lt_D(h_f)
413
414 p_LmDeleteAndNextRat(&p2, is, r); // t_g
415 p_LmDeleteAndNextRat(&HG, is, r); // r_g = h_g - lt_D(h_g)
416
417
418#ifdef PDEBUG
419 PrintS(" t_f: "); p_wrp(p1,r); PrintS("\n");
420 PrintS(" t_g: "); p_wrp(p2,r); PrintS("\n");
421 PrintS(" r_f: "); p_wrp(HF,r); PrintS("\n");
422 PrintS(" r_g: "); p_wrp(HG,r); PrintS("\n");
423 PrintS(" c': "); p_wrp(CC,r); PrintS("\n");
424 PrintS(" k': "); p_wrp(KK,r); PrintS("\n");
425
426#endif
427
428 // k'(r_f + d^{gamma-alpha} t_f)
429
430 p1 = p_Mult_q(m1, p1, r); // p1 = d^{gamma-alpha} t_f
431 p1 = p_Add_q(p1,HF,r); // p1 = r_f + d^{gamma-alpha} t_f
432 p1 = p_Mult_q(KK,p1,r); // p1 = k'(r_f + d^{gamma-alpha} t_f)
433
434 // c'(r_f + d^{gamma-beta} t_g)
435
436 p2 = p_Mult_q(m2, p2, r); // p2 = d^{gamma-beta} t_g
437 p2 = p_Add_q(p2,HG,r); // p2 = r_g + d^{gamma-beta} t_g
438 p2 = p_Mult_q(CC,p2,r); // p2 = c'(r_g + d^{gamma-beta} t_g)
439
440#ifdef PDEBUG
441 p_Test(p1,r);
442 p_Test(p2,r);
443 PrintS(" k'(r_f + d^{gamma-alpha} t_f): "); p_wrp(p1,r);
444 PrintS(" c'(r_g + d^{gamma-beta} t_g): "); p_wrp(p2,r);
445#endif
446
447 poly out = p_Add_q(p1,p2,r); // delete p1, p2; // the sum
448
449#ifdef PDEBUG
450 p_Test(out,r);
451#endif
452
453 // if ( out!=NULL ) pCleardenom(out); // postponed to enterS
454 return(out);
455}
WerrorS
void WerrorS(const char *s)
Definition: feFopen.cc:24
nc_mm_Mult_p
static poly nc_mm_Mult_p(const poly m, poly p, const ring r)
Definition: nc.h:233
p_GetComp
#define p_GetComp(p, r)
Definition: monomials.h:64
NULL
#define NULL
Definition: omList.c:12
p_LmDeleteAndNextRat
void p_LmDeleteAndNextRat(poly *p, int ishift, ring r)
Definition: p_polys.cc:1696
p_GetCoeffRat
poly p_GetCoeffRat(poly p, int ishift, ring r)
Definition: p_polys.cc:1718
p_Add_q
static poly p_Add_q(poly p, poly q, const ring r)
Definition: p_polys.h:934
p_Mult_q
static poly p_Mult_q(poly p, poly q, const ring r)
Definition: p_polys.h:1112
p_ExpVectorDiff
static void p_ExpVectorDiff(poly pr, poly p1, poly p2, const ring r)
Definition: p_polys.h:1472
p_Setm
static void p_Setm(poly p, const ring r)
Definition: p_polys.h:231
p_GetExp_k_n
static poly p_GetExp_k_n(poly p, int l, int k, const ring r)
Definition: p_polys.h:1370
p_Delete
static void p_Delete(poly *p, const ring r)
Definition: p_polys.h:899
p_Copy
static poly p_Copy(poly p, const ring r)
returns a copy of p
Definition: p_polys.h:844
p_Test
#define p_Test(p, r)
Definition: p_polys.h:159
p_wrp
void p_wrp(poly p, ring lmRing, ring tailRing)
Definition: polys0.cc:373
pOne
#define pOne()
Definition: polys.h:315
p_LmIsConstantRat
BOOLEAN p_LmIsConstantRat(const poly p, const ring r)
Definition: ratgring.cc:642
pLcmRat
void pLcmRat(poly a, poly b, poly m, int rat_shift)
Definition: ratgring.cc:30
p_HeadRat
poly p_HeadRat(poly p, int ishift, ring r)
Definition: ratgring.cc:64
ncGCD
ideal ncGCD(poly p, poly q, const ring r)
Definition: ratgring.cc:160
PrintS
void PrintS(const char *s)
Definition: reporter.cc:284
PrintLn
void PrintLn()
Definition: reporter.cc:310
id_Delete
void id_Delete(ideal *h, ring r)
deletes an ideal/module/matrix
Definition: simpleideals.cc:123

◆ nc_rat_ReduceSpolyNew()

poly nc_rat_ReduceSpolyNew ( poly  p1,
poly  p2,
int  ishift,
ring  r 
)

Definition at line 465 of file ratgring.cc.

466{
467 const long lCompP1 = p_GetComp(p1,r);
468 const long lCompP2 = p_GetComp(p2,r);
469
470 if ((lCompP1!=lCompP2) && (lCompP1!=0) && (lCompP2!=0))
471 {
472#ifdef PDEBUG
473 WerrorS("nc_rat_ReduceSpolyNew: different non-zero components!");
474#endif
475 return(NULL);
476 }
477
478 if (p_LmIsConstantRat(p1,r))
479 {
480 return( NULL );
481 }
482
483
484 int is = ishift; /* TODO */
485
486 poly m = pOne();
487 p_ExpVectorDiffRat(m, p2, p1, ishift, r); // includes X and D parts
488 //p_Setm(m,r);
489 // m = p_GetExp_k_n(m,1,ishift,r); /* rat D-exp of m */
490#ifdef PDEBUG
491 p_Test(m,r);
492 PrintS("d^alpha = "); p_wrp(m,r); PrintLn();
493#endif
494
495 /* pSetComp(m,r)=0? */
496 poly HH = NULL;
497 poly H = NULL;
498 HH = p_HeadRat(p1,is,r); //p_Copy(p_HeadRat(p1,is,r),r); // lm_D(g)
499// H = r->nc->p_Procs.mm_Mult_p(m, p_Copy(HH, r), r); // d^alpha lm_D(g)
500 H = nc_mm_Mult_p(m, HH, r); // d^alpha lm_D(g) == h_g in the paper
501
502 poly K = p_GetCoeffRat(H, is, r); //p_Copy( p_GetCoeffRat(H, is, r), r); // k in the paper
503 poly P = p_GetCoeffRat(p2, is, r); //p_Copy( p_GetCoeffRat(p2, is, r), r); // lc_D(p_2) == lc_D(f)
504
505#ifdef PDEBUG
506 PrintS("k: "); p_wrp(K,r); PrintS("\n");
507 PrintS("p: "); p_wrp(P,r); PrintS("\n");
508 PrintS("f: "); p_wrp(p2,r); PrintS("\n");
509 PrintS("g: "); p_wrp(p1,r); PrintS("\n");
510#endif
511 // alt:
512 poly out = p_Copy(p1,r);
513 p_LmDeleteAndNextRat(&out, is, r); // out == t_g
514
515 ideal ncsyz = ncGCD(P,K,r);
516 poly KK = ncsyz->m[0]; ncsyz->m[0]=NULL; //p_Copy(ncsyz->m[0],r); // k'
517 poly PP = ncsyz->m[1]; ncsyz->m[1]= NULL; //p_Copy(ncsyz->m[1],r); // p'
518
519#ifdef PDEBUG
520 PrintS("t_g: "); p_wrp(out,r);
521 PrintS("k': "); p_wrp(KK,r); PrintS("\n");
522 PrintS("p': "); p_wrp(PP,r); PrintS("\n");
523#endif
524 id_Delete(&ncsyz,r);
525 p_LmDeleteAndNextRat(&p2, is, r); // t_f
526 p_LmDeleteAndNextRat(&H, is, r); // r_g = h_g - lt_D(h_g)
527
528#ifdef PDEBUG
529 PrintS(" t_f: "); p_wrp(p2,r);
530 PrintS(" r_g: "); p_wrp(H,r);
531#endif
532
533 p2 = p_Mult_q(KK, p2, r); // p2 = k' t_f
534
535#ifdef PDEBUG
536 p_Test(p2,r);
537 PrintS(" k' t_f: "); p_wrp(p2,r);
538#endif
539
540// out = r->nc->p_Procs.mm_Mult_p(m, out, r); // d^alpha t_g
541 out = nc_mm_Mult_p(m, out, r); // d^alpha t_g
542 p_Delete(&m,r);
543
544#ifdef PDEBUG
545 PrintS(" d^a t_g: "); p_wrp(out,r);
546 PrintS(" end reduction\n");
547#endif
548
549 out = p_Add_q(H, out, r); // r_g + d^a t_g
550
551#ifdef PDEBUG
552 p_Test(out,r);
553#endif
554 out = p_Mult_q(PP, out, r); // p' (r_g + d^a t_g)
555 out = p_Add_q(p2,out,r); // delete out, p2; // the sum
556
557#ifdef PDEBUG
558 p_Test(out,r);
559#endif
560
561 // if ( out!=NULL ) pCleardenom(out); // postponed to enterS
562 return(out);
563}
m
int m
Definition: cfEzgcd.cc:128
H
CanonicalForm H
Definition: facAbsFact.cc:60
p_ExpVectorDiffRat
void p_ExpVectorDiffRat(poly pr, poly p1, poly p2, int ishift, ring r)
Definition: ratgring.cc:81

◆ ncGCD()

ideal ncGCD ( poly  p,
poly  q,
ring  r 
)

Definition at line 160 of file ratgring.cc.

161{
162 // destroys p and q
163 // assume: p,q are in the comm. ring
164 // to be used in the coeff business
165#ifdef PDEBUG
166 PrintS(" GCD_start:");
167#endif
168 poly g = singclap_gcd(p_Copy(p,r),p_Copy(q,r), r);
169#ifdef PDEBUG
170 p_wrp(g,r);
171 PrintS(" GCD_end;\n");
172#endif
173 poly u = singclap_pdivide(q, g, r); //q/g
174 poly v = singclap_pdivide(p, g, r); //p/g
175 v = p_Neg(v,r);
176 p_Delete(&p,r);
177 p_Delete(&q,r);
178 ideal h = idInit(2,1);
179 h->m[0] = u; // p_Copy(u,r);
180 h->m[1] = v; // p_Copy(v,r);
181 return(h);
182}
p
int p
Definition: cfModGcd.cc:4078
g
g
Definition: cfModGcd.cc:4090
singclap_pdivide
poly singclap_pdivide(poly f, poly g, const ring r)
Definition: clapsing.cc:624
v
const Variable & v
< [in] a sqrfree bivariate poly
Definition: facBivar.h:39
h
STATIC_VAR Poly * h
Definition: janet.cc:971
p_Neg
static poly p_Neg(poly p, const ring r)
Definition: p_polys.h:1105
singclap_gcd
poly singclap_gcd(poly f, poly g, const ring r)
polynomial gcd via singclap_gcd_r resp. idSyzygies destroys f and g
Definition: polys.cc:380
idInit
ideal idInit(int idsize, int rank)
initialise an ideal / module
Definition: simpleideals.cc:35

◆ ncGCD2()

ideal ncGCD2 ( poly  p,
poly  q,
ring  r 
)

Definition at line 112 of file ratgring.cc.

113{
114 // todo: must destroy p,q
115 intvec *w = NULL;
116 ideal h = idInit(2,1);
117 h->m[0] = p_Copy(p,r);
118 h->m[1] = p_Copy(q,r);
119#ifdef PDEBUG
120 PrintS("running syzygy comp. for nc_GCD:\n");
121#endif
122 ideal sh = idSyzygies(h, testHomog, &w);
123#ifdef PDEBUG
124 PrintS("done syzygy comp. for nc_GCD\n");
125#endif
126 /* in comm case, there is only 1 syzygy */
127 /* singclap_gcd(); */
128 poly K, K1, K2;
129 K = sh->m[0]; /* take just the first element - to be enhanced later */
130 K1 = pTakeOutComp(&K, 1); // 1st component is taken out from K
131// pShift(&K,-2); // 2nd component to 0th comp.
132 K2 = pTakeOutComp(&K, 1);
133// K2 = K;
134
135 PrintS("syz1: "); p_wrp(K1,r);
136 PrintS("syz2: "); p_wrp(K2,r);
137
138 /* checking signs before multiplying */
139 number ck1 = p_GetCoeff(K1,r);
140 number ck2 = p_GetCoeff(K2,r);
141 BOOLEAN bck1, bck2;
142 bck1 = n_GreaterZero(ck1,r);
143 bck2 = n_GreaterZero(ck2,r);
144 /* K1 <0, K2 <0 (-K1,-K2) */
145// if ( !(bck1 && bck2) ) /* - , - */
146// {
147// K1 = p_Neg(K1,r);
148// K2 = p_Neg(K2,r);
149// }
150 id_Delete(&h,r);
151 h = idInit(2,1);
152 h->m[0] = p_Copy(K1,r);
153 h->m[1] = p_Copy(K2,r);
154 id_Delete(&sh,r);
155 return(h);
156}
BOOLEAN
int BOOLEAN
Definition: auxiliary.h:87
intvec
Definition: intvec.h:23
n_GreaterZero
static FORCE_INLINE BOOLEAN n_GreaterZero(number n, const coeffs r)
ordered fields: TRUE iff 'n' is positive; in Z/pZ: TRUE iff 0 < m <= roundedBelow(p/2),...
Definition: coeffs.h:491
w
const CanonicalForm & w
Definition: facAbsFact.cc:51
idSyzygies
ideal idSyzygies(ideal h1, tHomog h, intvec **w, BOOLEAN setSyzComp, BOOLEAN setRegularity, int *deg, GbVariant alg)
Definition: ideals.cc:830
p_GetCoeff
#define p_GetCoeff(p, r)
Definition: monomials.h:50
pTakeOutComp
void pTakeOutComp(poly *p, long comp, poly *q, int *lq, const ring R=currRing)
Splits *p into two polys: *q which consists of all monoms with component == comp and *p of all other ...
Definition: polys.h:338
testHomog
@ testHomog
Definition: structs.h:38

◆ p_DivisibleByRat()

BOOLEAN p_DivisibleByRat ( poly  a,
poly  b,
int  ishift,
const ring  r 
)

Definition at line 569 of file ratgring.cc.

570{
571#ifdef PDEBUG
572 PrintS("invoke p_DivByRat with a = ");
573 p_wrp(p_Head(a,r),r);
574 PrintS(" and b= ");
575 p_wrp(p_Head(b,r),r);
576 PrintLn();
577#endif
578 int i;
579 for(i=r->N; i>ishift; i--)
580 {
581#ifdef PDEBUG
582 Print("i=%d,",i);
583#endif
584 if (p_GetExp(a,i,r) > p_GetExp(b,i,r)) return FALSE;
585 }
586 return ((p_GetComp(a,r)==p_GetComp(b,r)) || (p_GetComp(a,r)==0));
587}
FALSE
#define FALSE
Definition: auxiliary.h:96
i
int i
Definition: cfEzgcd.cc:132
b
CanonicalForm b
Definition: cfModGcd.cc:4103
Print
#define Print
Definition: emacs.cc:80
p_Head
static poly p_Head(const poly p, const ring r)
copy the (leading) term of p
Definition: p_polys.h:858
p_GetExp
static long p_GetExp(const poly p, const unsigned long iBitmask, const int VarOffset)
get a single variable exponent @Note: the integer VarOffset encodes:
Definition: p_polys.h:467

◆ p_ExpVectorDiffRat()

void p_ExpVectorDiffRat ( poly  pr,
poly  p1,
poly  p2,
int  ishift,
ring  r 
)

Definition at line 81 of file ratgring.cc.

82{
83 p_LmCheckPolyRing1(p1, r);
84 p_LmCheckPolyRing1(p2, r);
85 p_LmCheckPolyRing1(pr, r);
86 int i;
87 poly t=pr;
88 int e1,e2;
89 for (i=ishift+1; i<=r->N; i++)
90 {
91 e1 = p_GetExp(p1, i, r);
92 e2 = p_GetExp(p2, i, r);
93 // pAssume1(p_GetExp(p1, i, r) >= p_GetExp(p2, i, r));
94 if (e1 < e2)
95 {
96#ifdef PDEBUG
97 PrintS("negative ExpVectorDiff\n");
98#endif
99 p_Delete(&t,r);
100 break;
101 }
102 else
103 {
104 p_SetExp(t,i, e1-e2,r);
105 }
106 }
107 p_Setm(t,r);
108}
p_LmCheckPolyRing1
#define p_LmCheckPolyRing1(p, r)
Definition: monomials.h:177
p_SetExp
static unsigned long p_SetExp(poly p, const unsigned long e, const unsigned long iBitmask, const int VarOffset)
set a single variable exponent @Note: VarOffset encodes the position in p->exp
Definition: p_polys.h:486

◆ p_HeadRat()

poly p_HeadRat ( poly  p,
int  ishift,
ring  r 
)

Definition at line 64 of file ratgring.cc.

65{
66 poly q = pNext(p);
67 if (q == NULL) return p;
68 poly res = p_Head(p,r);
69 const long cmp = p_GetComp(p, r);
70 while ( (q!=NULL) && (p_Comp_k_n(p, q, ishift+1, r)) && (p_GetComp(q, r) == cmp) )
71 {
72 res = p_Add_q(res,p_Head(q,r),r);
73 q = pNext(q);
74 }
75 p_SetCompP(res,cmp,r);
76 return res;
77}
res
CanonicalForm res
Definition: facAbsFact.cc:60
pNext
#define pNext(p)
Definition: monomials.h:36
p_Comp_k_n
static int p_Comp_k_n(poly a, poly b, int k, ring r)
Definition: p_polys.h:638
p_SetCompP
static void p_SetCompP(poly p, int i, ring r)
Definition: p_polys.h:252

◆ p_LmIsConstantCompRat()

BOOLEAN p_LmIsConstantCompRat ( const poly  p,
const ring  r 
)

Definition at line 651 of file ratgring.cc.

652{
653 int i = r->real_var_end;
654
655 while ( (p_GetExp(p,i,r)==0) && (i>=r->real_var_start))
656 {
657 i--;
658 }
659 return ( i+1 == r->real_var_start );
660}

◆ p_LmIsConstantRat()

BOOLEAN p_LmIsConstantRat ( const poly  p,
const ring  r 
)

Definition at line 642 of file ratgring.cc.

643{
644 if (p_LmIsConstantCompRat(p, r))
645 return (p_GetComp(p, r) == 0);
646 return FALSE;
647}
p_LmIsConstantCompRat
BOOLEAN p_LmIsConstantCompRat(const poly p, const ring r)
Definition: ratgring.cc:651

◆ pContentRat()

static void pContentRat ( poly &  ph,
const ring  r = currRing 
)
inlinestatic

Definition at line 110 of file ratgring.h.

110{ p_ContentRat(ph, r); } ;
p_ContentRat
void p_ContentRat(poly &ph, const ring r)
Definition: p_polys.cc:1740

◆ pLcmRat()

void pLcmRat ( poly  a,
poly  b,
poly  m,
int  rat_shift 
)

Definition at line 30 of file ratgring.cc.

31{
32 /* rat_shift is the last exp one should count with */
33 int i;
34 for (i=(currRing->N); i>=rat_shift; i--)
35 {
36 pSetExp(m,i, si_max( pGetExp(a,i), pGetExp(b,i)));
37 }
38 pSetComp(m, si_max(pGetComp(a), pGetComp(b)));
39 /* Don't do a pSetm here, otherwise hres/lres chockes */
40}
si_max
static int si_max(const int a, const int b)
Definition: auxiliary.h:124
currRing
VAR ring currRing
Widely used global variable which specifies the current polynomial ring for Singular interpreter and ...
Definition: polys.cc:13
pGetComp
#define pGetComp(p)
Component.
Definition: polys.h:37
pSetComp
#define pSetComp(p, v)
Definition: polys.h:38
pGetExp
#define pGetExp(p, i)
Exponent.
Definition: polys.h:41
pSetExp
#define pSetExp(p, i, v)
Definition: polys.h:42

◆ redRat()

int redRat ( poly *  h,
poly *  reducer,
int *  red_length,
int  rl,
int  ishift,
ring  r 
)

Definition at line 593 of file ratgring.cc.

594{
595 if ((*h)==NULL) return 0;
596
597 int j,i,l;
598
599 loop
600 {
601 j=rl;l=MAX_INT_VAL;
602 for(i=rl-1;i>=0;i--)
603 {
604 // Print("test %d, l=%d (curr=%d, l=%d\n",i,red_length[i],j,l);
605 if ((l>red_length[i]) && (p_DivisibleByRat(reducer[i],*h,ishift,r)))
606 {
607 j=i; l=red_length[i];
608 // PrintS(" yes\n");
609 }
610 // else PrintS(" no\n");
611 }
612 if (j >=rl)
613 {
614 return 1; // not reducible
615 }
616
617 if (TEST_OPT_DEBUG)
618 {
619 PrintS("reduce ");
620 p_wrp(*h,r);
621 PrintS(" with ");
622 p_wrp(reducer[j],r);
623 }
624 poly hh=nc_rat_ReduceSpolyNew(reducer[j], *h, ishift, r);
625 // p_Delete(h,r);
626 *h=hh;
627 if (TEST_OPT_DEBUG)
628 {
629 PrintS(" to ");
630 p_wrp(*h,r);
631 PrintLn();
632 }
633 if ((*h)==NULL)
634 {
635 return 0;
636 }
637 }
638}
l
int l
Definition: cfEzgcd.cc:100
j
int j
Definition: facHensel.cc:110
MAX_INT_VAL
const int MAX_INT_VAL
Definition: mylimits.h:12
TEST_OPT_DEBUG
#define TEST_OPT_DEBUG
Definition: options.h:109
p_DivisibleByRat
BOOLEAN p_DivisibleByRat(poly a, poly b, int ishift, const ring r)
Definition: ratgring.cc:569
nc_rat_ReduceSpolyNew
poly nc_rat_ReduceSpolyNew(const poly p1, poly p2, int ishift, const ring r)
Definition: ratgring.cc:465
loop
#define loop
Definition: structs.h:75
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