2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/68027We briefly review selected contributions to immersion-theoretic topology, from S. Smale's immersion theory for spheres to M. Gromov's convex integration theory, during the early "golden" period from about 1959-1973. Historical remarks are included and technical concepts are presented informally.16 pages. Written in AMSTEXGeometric TopologyHistory and Overview57R42; 01A60text