2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/78887We describe a collection of constructions which illustrate a panoply of ``exotic'' smooth 4-manifolds.This article appeared in the Proceedings of the 1998 ICM Doc.Math.J.DMV Extra Volume ICM II (1998) 443-452Geometric TopologySymplectic Geometry57R55text