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D.6.20.2 deform
Procedure from library sing.lib (see 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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