Groups of units of integral group rings commensurable with direct products of free-by-free groups

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/104987We classify the finite groups $G$ such that the group of units of the integral group ring ${\mathbb Z} G$ has a subgroup of finite index which is a direct product of free-by-free groups.30 pages, Replaced on October 17 2006 after major revisionGroup TheoryRings and Algebras16U60, 11R27, 16A26Groups of units of integral group rings commensurable with direct products of free-by-free groupstext