2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/76899This paper deals with a semi-classical limit (Theorem 1) by using traditional mathematical methods, and shows a Hopf theorem as a corollary. A formal discussion of it may be found in [7].26 pagesDifferential Geometry53-xxA traditional dealing with a semi-classical limit and Hopf theoremtext