2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/33938By a suitable transformation, we derive the rotating Goedel universe from a static one and we show, how rotation may be implemented geometrically. The rotation law turns out to be a differential one. By increasing distance from the rotation axis the velocity of a rotating point will exceed the velocity of light and the cosmos has a cut-off radius. Thus, closed time-like curves do not occur in the Goedel universe.7 pagesGeneral Relativity and Quantum Cosmologytext