209 citations
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Showing 2002 · math.OAShow all
3 papers · 2 filters
math.OA2002
The Dixmier-Douady Class of Groupoid Crossed Products
Paul S. Muhly, Dana P. Williams
We give a formula for the Dixmier-Douady class of a continuous-trace groupoid crossed product that arises from an action of a locally trivial, proper, principal groupoid on a bundl…
math.OA2002
Continuous-Trace Groupoid Crossed Products
Igor Fulman, Paul S. Muhly, Dana P. Williams
Let be a second countable, locally compact groupoid with Haar system, and let be a bundle of -algebras defined over the unit space of on which a…
math.OA2002
Central twisted transformation groups and group -algebras of central group extensions
Siegfried Echterhoff, Dana P. Williams
We examine the structure of central twisted transformation group \cs-algebras $C_{0}(X)\rtimes_{\id,u}G$, and apply our results to the group \cs-algebras of central group extension…