2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/78888It is the purpose of this paper to construct families of examples of nonsymplectic 4-manifolds which (up to sign) have just one Seiberg-Witten basic class.8 pages. This is a paper written in 1997 and which will appear in the Pacific Journal of MathematicsGeometric TopologySymplectic Geometry57R55text