BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4//
BEGIN:VEVENT
UID:20251212T163934EST-6383ul2oKP@132.216.98.100
DTSTAMP:20251212T213934Z
DESCRIPTION:Title: Reflection groups beyond Coxeter groups.\n\nAbstract: Al
 l Coxeter groups are reflection groups. And there are many contexts where 
 'reflection group' and 'Coxeter group' mean essentially the same thing. In
  this talk I will\n\nhighlight a case where these notions are different. C
 oncretely\, a discrete group generated by finitely many reflections preser
 ving a non-singular quadratic form on a real metric vector space\n\nneed n
 ot be a Coxeter group.\n\nNote that there will not be teatime in the loung
 e at 4pm after Jon's talk due to the 91Ë¿¹ÏÊÓƵ departmental potluck from 4:30
 pm-6:30pm in the lounge. We will go for dinner with Jon after the talk. Pl
 ease email Piotr (piotr.przytycki [at] mcgill.ca) if you are interested in
  joining for dinner.\n
DTSTART:20251210T200000Z
DTEND:20251210T210000Z
LOCATION:Room 1104\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue
  Sherbrooke Ouest
SUMMARY:Jon McCammond (UC Santa Barbara)
URL:/mathstat/channels/event/jon-mccammond-uc-santa-ba
 rbara-369662
END:VEVENT
END:VCALENDAR