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DTSTART:20220313T070000
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DTSTART:20221106T060000
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DTSTART;TZID=America/Toronto:20230130T143000
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TRANSP:TRANSPARENT
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URL:https://uwaterloo.ca/pure-mathematics/events/colloquium-21
SUMMARY:Colloquium
CLASS:PUBLIC
DESCRIPTION:IAN HAMBLETON\, MCMASTER UNIVERSITY\n\n\"EULER CHARACTERISTICS 
 AND 4-MANIFOLDS\"\n\nThe topology and total curvature of a Riemann surface
  is determined by\na single integer\, the Euler characteristic (Leonhard E
 uler\,\n1707-1783). In dimension four and higher\, the Euler characteristi
 c\ngives an interesting invariant for finitely presented groups. The talk\
 nwill survey some recent joint work with Alejandro Adem on this theme.\n\n
 MC 5501
DTSTAMP:20260503T082926Z
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