2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/35673We investigate the group of large diffeomorphisms fixing a frame at a point for general closed 3-manifolds. We derive some general structural properties of these groups which relate to the picture of the manifold as being composed of extended `objects' (geons).13 Pages, Plain-TeX, no figuresGeneral Relativity and Quantum Cosmologytext