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D.15.35.34 homog_parts

Procedure from library schubert.lib (see schubert_lib).

Usage:
homog_parts(f,i,j); f poly, i int, j int

Return:
poly

Theory:
computing a polynomial which is the sum of the homogeneous components of a polynomial.

Example:
 
LIB "schubert.lib";
ring r = 0,(x,y,z),wp(1,2,3);
poly f = 1+x+x2+x3+x4+y+y2+y3+z+z2+xy+xz+yz+xyz;
homog_parts(f,2,4);
==> x4+y2+xz+x3+xy+z+x2+y