uminus

description:

g=uminus(f) is called for the syntax '-f' and means symbolic negation.

arguments:

NCpoly representing the polynomial f or matrix of NCpolys

output:

NCpoly representing the polynomial -f

possible usage:

-f, uminus(f)

example:

>> f=[x^2-2*x*y, (x-y)^2];

>> -f

ans = -x^2+2*x*y   -x^2+x*y+y*x-y^2