2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/117819The controlled end and h-cobrodism theorems (Ends of maps I, 1979) are used to give quick proofs of the Top/PL and PL/DIFF product structure theorems.6 pagesGeometric Topology57Q25A controlled-topology proof of the product structure theoremtext