2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/143408We show that the $C^*$-algebraic approach to T-duality of Mathai and Rosenberg is equivalent to the topological approach of Bunke and Schick.100 pages, German title and preface, the author's thesisOperator AlgebrasAlgebraic Topology46L85text