2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/152344If $X$ is a locally compact space which admits commuting free and proper actions of locally compact groups $G$ and $H$, then the Brauer groups $\Br_H(G/X)$ and $\Br_G(X/H)$ are naturally isomorphic.10 pages, AMS-LaTeX v1.1, KRW94Functional AnalysisRepresentation Theorytext