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7.7.8.0. lp2lstr
Procedure from library freegb.lib (see freegb_lib).
- Usage:
- lp2lstr(K,s); K an ideal, s a ring name
- Return:
- nothing (exports object @LN into the ring named s)
- Assume:
- basering has a letterplace ring structure
- Purpose:
- converts letterplace ideal to list of modules
- Note:
- useful as preprocessing to 'lst2str'
Example:
| | LIB "freegb.lib";
intmat A[2][2] = 2, -1, -1, 2; // sl_3 == A_2
ring r = 0,(f1,f2),dp;
def R = makeLetterplaceRing(3);
setring R;
ideal I = serreRelations(A,1);
lp2lstr(I,r);
setring r;
lst2str(@LN,1);
==> [1]:
==> f1*f2*f2-2*f2*f1*f2+f2*f2*f1
==> [2]:
==> f1*f1*f2-2*f1*f2*f1+f2*f1*f1
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