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SUMMARY:Sam Shepherd (University of Oxford)
DTSTART:20200909T190000Z
DTEND:20200909T200000Z
DTSTAMP:20260513T195536Z
UID:McGillGGT/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/McGillGGT/1/
 ">Quasi-isometric rigidity of generic cyclic HNN extensions of free groups
 </a>\nby Sam Shepherd (University of Oxford) as part of McGill geometric g
 roup theory seminar\n\n\nAbstract\nStudying quasi-isometries between group
 s is a major theme in geometric group theory. Of particular interest are t
 he situations where the existence of a quasi-isometry between two groups i
 mplies that the groups are equivalent in a stronger algebraic sense\, such
  as being commensurable. I will survey some results of this type\, and the
 n talk about recent work with Daniel Woodhouse where we prove quasi-isomet
 ric rigidity for certain graphs of virtually free groups\, which include "
 generic" cyclic HNN extensions of free groups.\n
LOCATION:https://researchseminars.org/talk/McGillGGT/1/
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