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D.5.8.1 deform

Procedure from library sing.lib (see section sing_lib).

Usage:

deform(id); id=ideal or poly

Return:

matrix, columns are kbase of infinitesimal deformations

Example:

LIB "sing.lib";
ring r   = 32003,(x,y,z),ds;
ideal i  = xy,xz,yz;
matrix T = deform(i);
print(T);
→ x,0,0,
→ 0,0,z,
→ 0,y,0 
print(deform(x3+y5+z2));
→ xy3,y3,xy2,y2,xy,y,x,1

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            User manual for Singular version 2-0-4, October 2002, generated by texinfo.