2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/72348Let S be a compact, connected, orientable surface of positive genus. Let HT(S) be the Hatcher-Thurston complex of S. We prove that Aut(HT(S)) is isomorphic to the extended mapping class group of S modulo its center.Some editorial changes are made, the list of references is expandedGeometric TopologyGroup Theory57M99; 20F38text