2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/123681We give a complete diffeomorphism classification of 1-connected manifolds (of dimension different from 4) whose integral homology is H(M)=Z+Z+Z.To appear in Journal of Differential GeometryGeometric TopologyAlgebraic Topology57R55A diffeomorphism classification of manifolds which are like projective planestext