[35aab3] | 1 | /**************************************** |
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| 2 | * Computer Algebra System SINGULAR * |
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| 3 | ****************************************/ |
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| 4 | /*************************************************************** |
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| 5 | * File: pp_Mult_mm__Template.cc |
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| 6 | * Purpose: template for p_Mult_n |
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| 7 | * Author: obachman (Olaf Bachmann) |
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| 8 | * Created: 8/00 |
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| 9 | * Version: $Id: pp_Mult_mm_Noether__T.cc,v 1.1.1.1 2003-10-06 12:16:02 Singular Exp $ |
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| 10 | *******************************************************************/ |
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| 11 | |
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| 12 | /*************************************************************** |
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| 13 | * |
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| 14 | * Returns: p*m, ll |
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| 15 | * ll == pLength(p*m) , if on input ll < 0 |
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| 16 | * pLength(p) - pLength(p*m), if on input ll >= 0 |
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| 17 | * Const: p, m |
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| 18 | * |
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| 19 | ***************************************************************/ |
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| 20 | LINKAGE poly pp_Mult_mm_Noether(poly p, const poly m, const poly spNoether, int &ll, const ring ri, poly &last) |
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| 21 | { |
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| 22 | p_Test(p, ri); |
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| 23 | p_LmTest(m, ri); |
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| 24 | assume(spNoether != NULL); |
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| 25 | if (p == NULL) |
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| 26 | { |
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| 27 | ll = 0; |
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| 28 | last = NULL; |
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| 29 | return NULL; |
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| 30 | } |
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| 31 | spolyrec rp; |
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| 32 | poly q = &rp, r; |
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| 33 | const unsigned long *spNoether_exp = spNoether->exp; |
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| 34 | number ln = pGetCoeff(m); |
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| 35 | omBin bin = ri->PolyBin; |
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| 36 | DECLARE_LENGTH(const unsigned long length = ri->ExpL_Size); |
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| 37 | DECLARE_ORDSGN(const long* ordsgn = ri->ordsgn); |
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| 38 | const unsigned long* m_e = m->exp; |
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| 39 | pAssume(!n_IsZero(ln,ri)); |
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| 40 | pAssume1(p_GetComp(m, ri) == 0 || p_MaxComp(p, ri) == 0); |
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| 41 | int l = 0; |
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| 42 | |
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| 43 | do |
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| 44 | { |
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| 45 | p_AllocBin(r, bin, ri); |
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| 46 | p_MemSum(r->exp, p->exp, m_e, length); |
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| 47 | p_MemAddAdjust(r, ri); |
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| 48 | |
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| 49 | p_MemCmp(r->exp, spNoether_exp, length, ordsgn, goto Continue, goto Continue, goto Break); |
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| 50 | |
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| 51 | Break: |
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| 52 | p_FreeBinAddr(r, ri); |
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| 53 | break; |
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| 54 | |
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| 55 | Continue: |
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| 56 | l++; |
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| 57 | q = pNext(q) = r; |
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| 58 | pSetCoeff0(q, n_Mult(ln, pGetCoeff(p), ri)); |
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| 59 | pIter(p); |
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| 60 | } while (p != NULL); |
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| 61 | |
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| 62 | if (ll < 0) |
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| 63 | ll = l; |
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| 64 | else |
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| 65 | ll = pLength(p); |
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| 66 | |
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| 67 | if (q != &rp) |
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| 68 | last = q; |
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| 69 | pNext(q) = NULL; |
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| 70 | |
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| 71 | p_Test(pNext(&rp), ri); |
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| 72 | return pNext(&rp); |
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| 73 | } |
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| 74 | |
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| 75 | |
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