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Title:
Non-amenable groups admitting no sofic approximation by expander graphs

Speaker:
Gabor Kun

Abstract:
We show that the direct product of an infinite, finitely generated Kazhdan Property (T) group and a finitely presented, not residually finite amenable group admits no sofic approximation by expander graphs. Joint work with Andreas Thom.

Link:
https://www.ias.edu/video/non-amenable-groups-admitting-no-sofic-approximation-expander-graphs