Singular

5.1.6 char_series

Syntax:

char_series ( ideal_expression )

Type:

matrix

Purpose:

the rows of the matrix represent the irreducible characteristic series of the ideal with respect to the current ordering of variables.
One application is the decomposition of the zero-set.

Example:

ring r=32003,(x,y,z),dp; print(char_series(ideal(xyz,xz,y))); ==> y,z, ==> x,y

See Characteristic sets.