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UID:20250915T210812EDT-5319TIp3ge@132.216.98.100
DTSTAMP:20250916T010812Z
DESCRIPTION:Free products in Diff(S1)\n\nWe prove that if G is a finitely g
 enerated non-virtually-abelian group\, then (G x Z) * Z does not embed int
 o Diff^2(S^1). In particular\, the class of subgroups of Diff^r(S^1) is no
 t closed under taking free products for each r >= 2. We complete the class
 ification of RAAGs embeddable in Diff^r(S^1) for each r\, answering a ques
 tion in a paper of M. Kapovich. (Joint work with Thomas Koberda)\n
DTSTART:20170927T190000Z
DTEND:20170927T200000Z
LOCATION:Room 920\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Sang-hyun Kim\, Seoul National University
URL:/mathstat/channels/event/sang-hyun-kim-seoul-natio
 nal-university-270538
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