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SUMMARY:Pieter Spaas (UCLA)
DTSTART:20210707T190000Z
DTEND:20210707T200000Z
DTSTAMP:20260420T052852Z
UID:NYC-NCG/61
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/NYC-NCG/61/"
 >Cohomological obstructions to lifting properties for full C*-algebras of 
 property (T) groups</a>\nby Pieter Spaas (UCLA) as part of Noncommutative 
 geometry in NYC\n\n\nAbstract\nWe will introduce and discuss the lifting p
 roperty (LP) and local lifting property (LLP) for full group C*-algebras. 
 We will then introduce a new method to refute these properties\, based on 
 non-vanishing of second cohomology groups. This will allow us to derive th
 at many natural examples of (relative) property (T) groups fail the LLP\, 
 and further large classes fail the LP. This is based on joint work with Ad
 rian Ioana and Matthew Wiersma.\n
LOCATION:https://researchseminars.org/talk/NYC-NCG/61/
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