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D.15.3.12 chHE

Procedure from library chern.lib (see chern_lib).

Usage:
chHE(c); c list of polynomials

Return:
polynomial

Purpose:
computes the highest relevant term of the Chern character

Note:
uses the elimination and is extremely inefficient,
is included just for comparison with chAll(c)

Example:
 
LIB "chern.lib";
ring r = 0, (c(1..3)), dp;
list l=c(1..3);
//the third degree term of the Chern character
print( chHE(l) );
==> -1/6*c(1)^3+1/2*c(1)*c(2)-1/2*c(3)