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SUMMARY:Pallavi Dani (LSU)
DTSTART:20220531T130000Z
DTEND:20220531T150000Z
DTSTAMP:20260423T041009Z
UID:WienGAGT/19
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/WienGAGT/19/
 ">Divergence\, thickness\, and hypergraph index for Coxeter groups</a>\nby
  Pallavi Dani (LSU) as part of Vienna Geometry and Analysis on Groups Semi
 nar\n\n\nAbstract\nDivergence and thickness are well studied quasi-isometr
 y invariants for finitely generated groups.  In general\, they can be quit
 e difficult to compute.  In the case of right-angled Coxeter groups\, Levc
 ovitz introduced the notion of hypergraph index\, which can be algorithmic
 ally computed from the defining graph\, and proved that it determines the 
 thickness and divergence of the group.  I will talk about joint work with 
 Yusra Naqvi\, Ignat Soroko\, and Anne Thomas\, in which we propose a defin
 ition of hypergraph index for general Coxeter groups.  We show that it det
 ermines the divergence and thickness in an infinite family of non-right-an
 gled Coxeter groups.\n
LOCATION:https://researchseminars.org/talk/WienGAGT/19/
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