Groupoids Extensions

Abstract: I shall present a groupoid version of the Mackey normal subgroup analysis in a C*-algebraic framework. More precisely, the main result is a description of the C*-algebra of a locally compact groupoid with Haar system, possibly endowed with a twist, which is an extension by a group bundle. The natural expression of this result uses Fell bundles over groupoids. When the group bundle is abelian, one obtains a twisted groupoid C*-algebra. I will give some applications. This talk is based on a joint work with M.Ionescu, A.Kumjian, A.Sims and D.Williams.

operator algebrasrings and algebras

Audience: researchers in the topic

Western Sydney University Abend Seminars

Series comments: Description: Western Sydney University Abend Seminars

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