D.5.5.5 PPolyQp

Usage:

PPolyQp(z, r, n); z polynomial, r, n integers

Return:

polynomial in z

Purpose:

computes the Poincare polynomial of the punctual Quot-scheme of rank r on n planar points

Note:

zero is returned if n<0 or r<=0

LIB "goettsche.lib";
ring r=0, (z), ls;
// get the Poincare polynomial of the punctual Hilbert scheme (r=1)
// of 3 planar points
print( PPolyQp(z, 1, 3) );
==> 1+z2+z4