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UID:20250711T202425EDT-5771IMhbfW@132.216.98.100
DTSTAMP:20250712T002425Z
DESCRIPTION:Title: Extremely amenable automorphism groups of countable stru
 ctures.\n\nAbstract: Extreme amenability is a remarkable property for a to
 pological group to have. Ever since the first example of such groups was c
 onstructed in 1975\, many groups have been shown to be extremely amenable.
  In this talk I will address the question: How many pairwise non-isomorphi
 c extremely amenable groups are there? We demonstrate that there are conti
 nuum many pairwise non-isomorphic extremely amenable groups which are auto
 morphism groups of countable structures\, and in particular Polish. I will
  also talk about some related results from the point of view of descriptiv
 e set theory. This is joint work with Mahmood Etedadialiabadi and Feng Li.
 \n	\n	A coffee break will be served before the colloquium at 2pm in the grad
 uate lounge at ºÃÉ«TVl\n
DTSTART:20240926T183000Z
DTEND:20240926T193000Z
LOCATION:Room 920\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Su Gao (Nankai University)
URL:/mathstat/channels/event/su-gao-nankai-university-
 359870
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