2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/99542We prove that for any \e>0, there exists a closed hyperbolic 4-manifold with a closed geodesic of length < \e.4 pages, 1 figureGeometric Topology30F40; 57MSystoles of hyperbolic 4-manifoldstext