2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/136179Let G be a group and let K be a field of characteristic zero. We shall prove that KG can be embedded into a von Neumann unit-regular ring. In the course of the proof, we shall obtain a result relevant to the Atiyah conjecture.5 pages, to appear in the conference proceedings of the "International Conference on Modules and Comodules", dedicated to Robert Wisbauer, to be published by BirkhauserRings and AlgebrasGroup Theory16S34 (Primary); 16E50, 20C07 (Secondary)text