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UID:20261001T071844EDT-2868rd4vTf@132.216.98.100
DTSTAMP:20261001T111844Z
DESCRIPTION:Title: Classifying space for proper actions for groups admittin
 g a strict fundamental domain.\n\nAbstract:\n\nFor an infinite discrete gr
 oup G\, the classifying space for proper actions EG is a proper G-CW-compl
 ex X such that for every finite subgroup F⊂G the fixed point set XF is con
 tractible. In joint work with Nansen Petrosyan we describe a procedure of 
 constructing new models for E––G out of the standard ones\, provided the a
 ction of G on EG admits a strict fundamental domain. Our construction is o
 f combinatorial nature\, and it depends only on the structure of the funda
 mental domain. The resulting model is often much 'smaller' than the old on
 e\, and thus it is well-suited for (co-)homological computations. Before o
 utlining the construction\, I shall give some background on the space EG. 
 I will also discuss some examples and applications in the context of Coxet
 er groups\, graph products of finite groups\, and automorphism groups of b
 uildings.\n
DTSTART:20181121T200000Z
DTEND:20181121T210000Z
LOCATION:Room 1104\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue
  Sherbrooke Ouest
SUMMARY:Tomasz Prytuła (Max Planck Institute)
URL:https://www.mcgill.ca/mathstat/channels/event/tomasz-prytula-max-planck
 -institute-291816
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