minus

description:

h=minus(f, g) is called for the syntax 'f - g' and means symbolic subtraction.

arguments:

f and g are NCpolys representing polynomials or matrix of NCpolys with matching dimensions

output:

NCpoly representing the polynomial f - g

possible usage:

f - g, minus(f, g)

example:

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

>> f-g

ans = -3*x*y   x*y+y*x