2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40544We comment briefly on some of the advantages and disadvantages of compact hyperbolic manifolds as candidate manifolds for large radii compactifications.7 pages. References added. Talk presented at Cairo Int. Conf. on High Energy Physics (CICHEP 2001). To be published in the proceedings of the conferenceHigh Energy Physics - PhenomenologyCompact Hyperbolic Manifolds as Internal Worldstext