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SUMMARY:Thomas Haettel (Université de Montpellier)
DTSTART:20201014T190000Z
DTEND:20201014T200000Z
DTSTAMP:20260513T195536Z
UID:McGillGGT/6
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/McGillGGT/6/
 ">The coarse Helly property\, hierarchical hyperbolicity\, and semihyperbo
 licity</a>\nby Thomas Haettel (Université de Montpellier) as part of McGi
 ll geometric group theory seminar\n\n\nAbstract\nFor any hierarchically hy
 perbolic group\, and in particular any mapping class\ngroup\, we define a 
 new metric that satisfies a coarse Helly property. This\nenables us to ded
 uce that the group is semihyperbolic\, i.e. that it admits\na bounded quas
 igeodesic bicombing\, and also that it has finitely many\nconjugacy classe
 s of finite subgroups. This has several other consequences\nfor the group.
  This is a joint work with Nima Hoda and Harry Petyt.\n
LOCATION:https://researchseminars.org/talk/McGillGGT/6/
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