TY - JOUR AU - Hilden, Hugh Michael AU - Lozano Imízcoz, María Teresa AU - Montesinos Amilibia, José María PY - 2001 SN - 0041-8986 UR - https://hdl.handle.net/20.500.14352/58647 T2 - Atti del Seminario matematico e fisico dell'Università di Modena AB - Let H3 denote hyperbolic 3-space and identify its group of orientation-preserving isometries with PSL(2,C). In the context of usage here, a universal group is a cocompact subgroup U of PSL(2,C) which has the property that every closed, oriented... M2 - 1 PB - Seminario matematico e fisico, KW - universal group TI - The arithmetic structure of a universal group TY - journal article VL - 49 ER -