Title	Some rigidity aspects in von Neumann algebras and C*-algebras arising from groups
Creator	Chifan, Ionut
Publisher	Banff International Research Station for Mathematical Innovation and Discovery
Date Issued	2019-10-03T13:31
Description	In the first part of my talk I will discuss the problems of reconstructing a countable discrete group from its von Neumann algebra (W-superrigidity) and its reduced C-algebra (C-superrigidity) and I will survey several recent results in this direction. In the second part, using and interplay between von Neumann algebraic and C-algebraic methods, I will introduce a new class of C-superrigid groups which appear as wreath products with non-amenable core. As an application we obtain complete calculations of the symmetry groups of various group C-algebras---a problem barely touched in the literature. This is based on a recent joint work with Alec Diaz-Arias.
Extent	56.0 minutes
Subject	Mathematics; Functional analysis; Dynamical systems and ergodic theory
Type	Moving Image
File Format	video/mp4
Language	eng
Notes	Author affiliation: University of Iowa
Series	BIRS Workshop Lecture Videos (Banff, Alta)
Date Available	2020-04-01
Provider	Vancouver : University of British Columbia Library
Rights	Attribution-NonCommercial-NoDerivatives 4.0 International
DOI	10.14288/1.0389703
URI	http://hdl.handle.net/2429/73872
Affiliation	Non UBC
Peer Review Status	Unreviewed
Scholarly Level	Researcher
Rights URI	http://creativecommons.org/licenses/by-nc-nd/4.0/
Aggregated Source Repository	DSpace

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