2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/107480In this note we present a characterization of those open n-manifolds (n>4), whose products with the real line are homeomorphic to interiors of compact (n+1)-manifolds with boundary.16 pages, 2 figuresGeometric Topology57N15; 57N12text