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SUMMARY:Bernoulli actions of type III and L^2-cohomology
DTSTART:20171012T130000
DTEND:20171012T140000
DTSTAMP:20260916T044052Z
UID:c343eb8c62c591a4a8d55dc224910ee0871648a7f3e02729a8f9af2b
CATEGORIES:Conferences - Seminars
DESCRIPTION:Jonas Wahl (KU Leuven)\nWhile the study of measure preserving 
 Bernoulli actions of discrete groups has yielded many stunning results dur
 ing recent years\, not so much is known as soon as one steps away from the
  measure preserving case. In fact\, until recently\, the only discrete gro
 up known to admit a Bernoulli action without invariant measure was the gro
 up of integers. In this talk\, I aim to demonstrate that the question whet
 her or not a given group admits a Bernoulli action without invariant measu
 re\, depends strongly on its first L^2-cohomology. In particular\, I will 
 show how to construct such actions for a large class of discrete groups an
 d give some applications. This is joint work with Stefaan Vaes.
LOCATION:MA A3 31 https://plan.epfl.ch/?room=MAA331
STATUS:CONFIRMED
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