RT Journal Article T1 Basic classes for four-manifolds not of simple type A1 Muñoz, Vicente AB 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 b1 > 0.We also give a structure theorem for the Donaldson invariants of 4-manifolds with b+ > 1, b1 > 0 and of strong simple type. PB International Press SN 1019-8385 YR 2000 FD 2000 LK https://hdl.handle.net/20.500.14352/58464 UL https://hdl.handle.net/20.500.14352/58464 LA eng NO DGES DS Docta Complutense RD 5 abr 2025