%0 Journal Article
%T Basic classes for four-manifolds not of simple type
%A Vicente Mu£żoz
%J Mathematics
%D 1998
%I arXiv
%X We extend the notion of basic classes (for the Donaldson invariants) to 4-manifolds with $b^+>1$ which are (potentially) not of simple type or satisfy $b_1 >0$. We also give a structure theorem for the Donaldson invariants of 4-manifolds with $b^+>1$, $b_1>0$ and of strong simple type.
%U http://arxiv.org/abs/math/9811089v2