2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/229729We prove that the natural invariant surface associated with the billiard game on an irrational polygonal table is homeomorphic to the Loch Ness monster, that is, the only orientable infinite genus topological real surface with exactly one end.15 pages, 18 figuresDynamical Systemstext