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UID:20251105T134043EST-1514XgFOUo@132.216.98.100
DTSTAMP:20251105T184043Z
DESCRIPTION:On geodesic ray bundles in buildings\n\nBuildings were original
 ly introduced by Jacques Tits around the 1950s as a geometric tool to stud
 y the semisimple Lie (and algebraic) groups. By now\, buildings have a ver
 y rich theory of their own\; for instance\, they possess a 'non-positively
  curved' cellular complex structure\, which makes them prominent objects o
 f interest in geometric group theory. In this talk\, I will investigate ce
 rtain combinatorial analogues of geodesic rays in buildings (the 'geodesic
  ray bundles') and give some intuition about how they look like. Using rec
 ent results of Huang\, Sabok and Shinko\, I will then derive some conseque
 nces on the topic of hyperfinite group actions.\n
DTSTART:20181107T200000Z
DTEND:20181107T210000Z
LOCATION:Room 1104\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue
  Sherbrooke Ouest
SUMMARY:Timothée Marquis\, Université Catholique de Louvain
URL:/mathstat/channels/event/timothee-marquis-universi
 te-catholique-de-louvain-291304
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