Wall-crossing formulae for algebraic surfaces with positive irregularity.

Abstract

We extend the ideas of Friedman and Qin [5] to find the wall-crossing formulae for the Donaldson invariants of algebraic surfaces with pg = 0, q > 0 and anticanonical divisor −K effective, for any wall ç with lç = 1 4 (ç2 −p1) being 0 or 1.