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SUMMARY:Tsachik Gelander
DTSTART:20210809T115000Z
DTEND:20210809T122000Z
DTSTAMP:20260417T005906Z
UID:MSR80/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MSR80/2/">In
 finite volume and infinite injectivity radius</a>\nby Tsachik Gelander as 
 part of International Conference on Discrete groups\, Geometry and Arithme
 tic\n\n\nAbstract\nWe prove the following conjecture of Margulis. Let G be
  a higher rank simple Lie group\nand Λ a discrete subgroup. Then vol(G/Λ
 ) is finite if and only if there is a compact set in G which\nintersects n
 ontrivially every conjugate of Λ. In the special case where Λ is a norma
 l subgroup of a\nlattice this is the celebrated normal subgroup theorem of
  Margulis. [This is joint work with Mikolaj\nFraczyk.]\n
LOCATION:https://researchseminars.org/talk/MSR80/2/
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