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SUMMARY:Orthogonality as Graph with an Application to Finite Coxeter Group
 s [Oberseminar Darstellungstheorie]
DTSTART:20260515T121500Z
DTEND:20260515T131500Z
DTSTAMP:20260420T222500Z
UID:indico-event-1242@math-events.uni-bonn.de
DESCRIPTION:Speakers: Götz Pfeiffer (University of Galway\, Ireland)\n\nT
 he common neighborhood of a set of nodes in a simple graph is a\nGalois co
 nnection with associated closure operation on the power set\nof the node s
 et.  An application of this concept to root systems\nyields a new Galois c
 onnection on the (conjugacy classes of) parabolic\nsubgroups of a finite C
 oxeter group which we have used to refine\nHowlett's description of the no
 rmalizers of its parabolic subgroups.\nThis talk is based on joint work G.
  Roehrle and J.M. Douglass\n(arXiv:2509.15850).\n\nhttps://math-events.uni
 -bonn.de/event/1242/
LOCATION:MPIM\, Vivatsgasse\,  7 - Lecture Hall (Max Planck Institute for 
 Mathematics)
URL:https://math-events.uni-bonn.de/event/1242/
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