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UID:20260605T041955EDT-7879flTdu8@132.216.98.100
DTSTAMP:20260605T081955Z
DESCRIPTION:Title: Coloring curves on surfaces.\n\nIn the context of provin
 g that the mapping class group has finite asymptotic dimension\, Bestivina
 -Bromberg-Fujiwara exhibited a finite coloring of the curve graph\, i.e. a
  map from the vertices to a finite set so that vertices of distance one ha
 ve distinct images. In joint work with Josh Greene and Nicholas Vlamis we 
 give more attention to the minimum number of colors needed. We show: The s
 eparating curve graph has chromatic number coarsely equal to $g \log(g)$\,
  and the subgraph spanned by vertices in a fixed non-zero homology class i
 s uniquely $g-1$-colorable. Time permitting\, we discuss related questions
 \, including an intriguing relationship with the Johnson homomorphism of t
 he Torelli group.\n
DTSTART:20180221T200000Z
DTEND:20180221T210000Z
LOCATION:Room 920\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Jonah Gaster (McGill University)
URL:https://www.mcgill.ca/mathstat/channels/event/jonah-gaster-mcgill-unive
 rsity-285191
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