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UID:20260509T162845EDT-8920wVz0Fp@132.216.98.100
DTSTAMP:20260509T202845Z
DESCRIPTION:Title: Truncated Braid Groups and Platonic Solids\n\nAbstract: 
 In the 1950s\, Coxeter considered the quotients of braid groups given by a
 dding the relation that all half Dehn twist generators have some fixed\, f
 inite order. He found a remarkable formula for the order of these groups i
 n terms of some related Platonic solids. Despite the inspiring apparent co
 nnection between these topological and geometric objects\, Coxeter’s proof
  boils down to a finite case check that doesn't shed much light on the str
 ucture present. I’ll explain recent work that gives an interpretation of t
 he truncated 3-strand braid group that makes the connection with Platonic 
 solids clear\, using down-to-earth geometric and algebraic topological too
 ls.\n\nWe will gather in the lounge for teatime after the talk\, and then 
 we will go for dinner with Ethan.\n
DTSTART:20260318T200000Z
DTEND:20260318T210000Z
LOCATION:Room 1104\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue
  Sherbrooke Ouest
SUMMARY:Ethan Dlugie (Brown University)
URL:/mathstat/channels/event/ethan-dlugie-brown-univer
 sity-371977
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