Continuous-Trace Groupoid Crossed Products

Abstract

Let $G$ be a second countable, locally compact groupoid with Haar system, and let $\mathcal{A}$ be a bundle of $C^{\ast }$-algebras defined over the unit space of $G$ on which $G$ acts continuously. We determine conditions under which the associated crossed product $C^{\ast }(G;\mathcal{A})$ is a continuous trace $C^{\ast }$-algebra.

11 pages