2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/60160This paper has been withdrawn, because its material has been revised and became part of paper math.GT/0010184This paper has been withdrawn, because its material has been revised and became part of paper math.GT/0010184Geometric Topology57M50Geometrization of 3-dimensional orbifolds, Part I: Geometry of cone manifoldstext