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SUMMARY:Sang-hyun Kim (KIAS)
DTSTART:20220614T130000Z
DTEND:20220614T150000Z
DTSTAMP:20260423T023016Z
UID:WienGAGT/20
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/WienGAGT/20/
 ">Critical regularity of one-manifold actions by right-angled Artin groups
  and mapping class groups</a>\nby Sang-hyun Kim (KIAS) as part of Vienna G
 eometry and Analysis on Groups Seminar\n\n\nAbstract\nFor each finite inde
 x subgroup \\(H\\) of the mapping class group of a closed hyperbolic surfa
 ce\, and for each real number \\(r>1\\) we prove that there does not exist
  a faithful \\(C^r\\)-action (in Hölder's sense) of \\(H\\) on a circle. 
 For this\, we determine the allowed regularities of faithful actions by ma
 ny right-angled Artin groups on a circle. (Joint with Thomas Koberda and C
 ristobal Rivas)\n
LOCATION:https://researchseminars.org/talk/WienGAGT/20/
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