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D.15.19.1 applyVecField

Procedure from library VecField.lib (see VecField_lib).

Usage:
applyVecField(VecField V, poly/ideal p [,int n])

Return:
if p is a polynomial, return a polynomial V(p), if p is an ideal, the ideal V(p). If an optional n is given, only the parts of V up to and including degree n are applied to p.

Example:
 
LIB "VecField.lib";
int oldp = printlevel;
printlevel = 1;
ring r = 0, (x, y, z),ds;
vector v = [-1,-1,-1];
VecField V = v;
poly f = x3+2y3+xz2;
poly g = V*f;
ideal I = (x2,y);
ideal J = V*I;
printlevel = oldp;