2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/96586Several recent large length scale methods of detecting the topology of the Universe are briefly reviewed. Three-dimensional methods include those of Lehoucq, Luminet & Lachièze-Rey (1996), Roukema (1996) and Roukema & Edge (1997). The two-dimensional ``circles'' method of Cornish, Spergel & Starkman (1996b) is also mentioned.standard \LaTeX, 7 pages, uses mycite.sty (provided), to appear in Acta Cosmologica, proceedings of Concepts de l'Espace en Physique, Les Houches, 29 sep - 3 oct 1997AstrophysicsGeneral Relativity and Quantum Cosmologytext