BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Becky Armstrong (Universität Münster) DTSTART:20211013T190000Z DTEND:20211013T200000Z DTSTAMP:20260420T052909Z UID:NYC-NCG/75 DESCRIPTION:Title: A uniqueness theorem for twisted groupoid C*-algebras\nby Becky Armst rong (Universität Münster) as part of Noncommutative geometry in NYC\n\n \nAbstract\nTwisted groupoid C*-algebras were introduced by Renault in 198 0 and are a generalisation of twisted group C*-algebras\, which are the C* -algebraic analogue of twisted group rings. Through the work of Renault an d more recently of Li\, it has emerged that every simple classifiable C*-a lgebra can be realised as a twisted groupoid C*-algebra\, a result that ha s led to increased interest in the structure of these C*-algebras. In this talk I will describe the construction of reduced twisted C*-algebras of H ausdorff étale groupoids. I will then discuss my recent preprint in which I prove a uniqueness theorem for these algebras and use this to character ise simplicity in the case where the groupoid is effective.\n LOCATION:https://researchseminars.org/talk/NYC-NCG/75/ END:VEVENT END:VCALENDAR