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B.6.0.1 CentralQuot
Procedure from library ncdecomp.lib (see ncdecomp_lib).
- Usage:
- CentralQuot(M, T), for a module M and an ideal T,
- Return:
- module of the central quotient I:G,
- Note:
- the output module is not necessarily a Groebner basis,
Example:
| LIB "ncdecomp.lib";
option(returnSB);
def a = sl2();
setring a;
ideal I = e3,f3,h3-4*h;
I = std(I);
poly C=4*e*f+h^2-2*h;
ideal G = (C-8)*(C-24);
ideal R = CentralQuot(I,G);
R;
==> R[1]=h
==> R[2]=f
==> R[3]=e
| CentralSaturation, CenCharDec
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