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SUMMARY:Jean Renault (d'Orleans)
DTSTART:20200716T100000Z
DTEND:20200716T110000Z
DTSTAMP:20260419T055900Z
UID:CRMDS/9
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CRMDS/9/">Gr
 oupoids Extensions</a>\nby Jean Renault (d'Orleans) as part of Western Syd
 ney University Abend Seminars\n\n\nAbstract\nI shall present a groupoid ve
 rsion 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 l
 ocally compact groupoid with Haar system\, possibly endowed with a twist\,
  which is an extension by a group bundle. The natural expression of this r
 esult 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 an
 d D.Williams.\n
LOCATION:https://researchseminars.org/talk/CRMDS/9/
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