Departamento de Matemáticas, Universidad Simón Bolívar, Apartado Postal 89000, Caracas 1080-A, Venezuela ; Departamento de Matemáticas, Universidad de Murcia, 30100 Murcia, Spain
Abstract:
We prove that the group generated by the bicyclic units of has torsion for . This answers a question of Sehgal (1993).