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UID:20250707T012107EDT-2329VUJAUX@132.216.98.100
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DESCRIPTION:Title: Quasi-isometric rigidity of generic cyclic HNN extension
 s of free groups.\n\nAbstract: Studying quasi-isometries between groups is
  a major theme in geometric group theory. Of particular interest are the s
 ituations where the existence of a quasi-isometry between two groups impli
 es that the groups are equivalent in a stronger algebraic sense\, such as 
 being commensurable. I will survey some results of this type\, and then ta
 lk about recent work with Daniel Woodhouse where we prove quasi-isometric 
 rigidity for certain graphs of virtually free groups\, which include 'gene
 ric' cyclic HNN extensions of free groups.\n\n \n\n \n\nLink: https://mcgi
 ll.zoom.us/j/98910726246?pwd=VHlzTzdTZGtqcHVuWGNKdys4d0FzQT09\n\nZoom ID: 
 989 1072 6246\n	Password: delta\n\n \n
DTSTART:20200909T190000Z
DTEND:20200909T200000Z
SUMMARY:Sam Shepherd (University of Oxford)
URL:/mathstat/channels/event/sam-shepherd-university-o
 xford-324255
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