spielwiese
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Last change
on this file since 107aac was
891438c,
checked in by Gerhard Pfister <pfister@…>, 23 years ago
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*GP: initial release
git-svn-id: file:///usr/local/Singular/svn/trunk@5579 2c84dea3-7e68-4137-9b89-c4e89433aadc
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-
Property mode set to
100644
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File size:
750 bytes
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| 1 | LIB "tst.lib"; |
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| 2 | tst_init(); |
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| 3 | |
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| 4 | proc MonomialHilbertPoincare(ideal I) |
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| 5 | { |
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| 6 | I = interred(I); //computes a minimal set of generators |
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| 7 | int s= size(I); //of the monomial ideal I |
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| 8 | |
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| 9 | if(I[1] ==0){return(1);} //I=<0> |
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| 10 | if(I[1] ==1){return(0);} //I=<1> |
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| 11 | if(deg(I[s])==1){return((1-var(1))^s);} //I is generated by |
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| 12 | //s of the {var(j)} |
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| 13 | int j=2; |
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| 14 | while(leadexp(I[s])[j]==0){j++;} //I[s]=var(j)*m |
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| 15 | return(MonomialHilbertPoincare(I+var(j)) |
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| 16 | +var(1)*MonomialHilbertPoincare(quotient(I,var(j)))); |
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| 17 | } |
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| 18 | |
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| 19 | ring A=0,(t,x,y,z),dp; |
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| 20 | ideal I=x5y2,x3,y3,xy4,xy7; |
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| 21 | |
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| 22 | MonomialHilbertPoincare(I); |
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| 23 | |
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| 24 | intvec v=hilb(std(I),1); |
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| 25 | v; |
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| 26 | |
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| 27 | tst_status(1);$ |
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