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SUMMARY:On metrizable universal minimal flows
DTSTART:20170309T130000
DTEND:20170309T140000
DTSTAMP:20260407T162231Z
UID:bc5c77cd3d49de6101ea1fae0ea63ae73c2ed705481acf02d1ddc9af
CATEGORIES:Conferences - Seminars
DESCRIPTION:Todor Tsankov (Paris)\nTo every topological group\, one can as
 sociate a unique universal minimal flow (UMF): a flow that maps onto every
  minimal flow of the group. For some groups (for example\, the locally com
 pact ones)\, this flow is not metrizable and does not admit a concrete des
 cription. However\, for many "large" Polish groups\, the UMF is metrizable
 \, can be computed\, and carries interesting combinatorial information. Th
 e talk will concentrate on some new results that give a characterization o
 f metrizable UMFs of Polish groups. It is based on two papers\, one joint 
 with I. Ben Yaacov and J. Melleray\, and the other with J. Melleray and L.
  Nguyen Van Thé.
LOCATION:MA 12 http://plan.epfl.ch/?room=ma12
STATUS:CONFIRMED
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