D.5.2.31 chWedge

Usage:

chWedge(k, r, c [,pos]); k, r integers, c list of polynomials, pos list of integers

Return:

list with entries: int N, list of polynomials l

Purpose:

computes the rank and the Chern classes of the exterior power of a vector bundle

Note:

for the second exterior power chWedge2L(...) could be faster

LIB "chern.lib";
ring r=0, (c(1..5)), dp;
list l=c(1..5);
// the rank and the Chern classes of the second exterior power of a vector bundle of rank 3
print( chWedge(2, 3, l) );
// the rank and the first 3 Chern classes
// of the fourth exterior power of a vector bundle of rank 5
print( chWedge(4, 5, l, 1, 2, 3) );