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D.15.35.35 logg

Procedure from library schubert.lib (see schubert_lib).

Usage:
logg(f,n); f poly, n int

Return:
poly

Theory:
computing Chern characters from total Chern classes.

Example:
 
LIB "schubert.lib";
ring r = 0,(x,y),wp(1,2);
poly f = 1+x+y;
logg(f,4);
==> 1/24x4-1/6x2y+1/12y2+1/6x3-1/2xy+1/2x2-y+x