2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/64771We observe that the results of Feighn-Handel and Geoghegan-Mihalik-Sapir-Wise about coherence and Hopficity of mapping tori of injective endomorphisms of free groups extend to non-injective endomorphisms.Group Theory20F05A remark on mapping tori of free group endomorphismstext