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UID:20251027T170809EDT-1320STkvbu@132.216.98.100
DTSTAMP:20251027T210809Z
DESCRIPTION:Title: The Parallel Wall Theorem for CAT(0) even 2-complexes\n
 \nAbstract: The Parallel Wall Theorem for Coxeter groups\, first introduce
 d by Davis-Shapiro and proven by Brink-Howlett\, establishes a finiteness 
 property for walls in Coxeter groups\, i.e. the fixed point sets in $\text
 {Cay}(W\, S)$ of reflections in the Coxeter group $(W\, S)$. The theorem s
 tates that there is a bound $K$\, depending only on the Coxeter group $(W\
 , S)$\, such that\, for any element $w\in W$ and wall $\mathcal{W}$ at dis
 tance $\geq K$ from $w$\, there is another wall in $(W\, S)$ separating $w
 $. We prove the analogous statement for CAT(0) even 2-complexes\, i.e. 2-c
 omplexes built out of even-sided regular polygons whose piecewise Euclidea
 n metric is CAT(0).\n\nWe will gather for teatime in the lounge at 4pm aft
 er the talk.\n\n \n
DTSTART:20251029T190000Z
DTEND:20251029T200000Z
LOCATION:Room 1104\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue
  Sherbrooke Ouest
SUMMARY:Carl Kristof-Tessier (9IÖÆ×÷³§Ãâ·Ñ)
URL:/smerg/channels/event/carl-kristof-tessier-mcgill-
 university-368585
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