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DTSTART:20230312T070000
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DTSTART:20231105T060000
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DTSTART;TZID=America/Toronto:20240229T140000
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URL:https://uwaterloo.ca/combinatorics-and-optimization/events/algebraic-an
 d-enumerative-combinatorics-leo-jiang
SUMMARY:Algebraic and Enumerative Combinatorics - Leo Jiang
CLASS:PUBLIC
DESCRIPTION:TITLE: Real matroid Schubert varieties\, zonotopes\, and virtua
 l Weyl\ngroups\n\nSPEAKER:\n Leo Jiang\n\nAFFILIATION:\n University of Tor
 onto\n\nLOCATION:\n MC 5479\n\nThere will be a pre-seminar presenting rele
 vant background at the\nbeginning graduate level starting at 1pm.\n\nABSTR
 ACT: Every linear representation of a matroid determines a\nmatroid Schube
 rt variety whose geometry encodes combinatorics of the\nmatroid. When the 
 representation is over the real numbers\, we show\nthat the topology of th
 ese varieties is completely determined by the\ncombinatorics of zonotopes.
  As an application\, we compute the\nfundamental groups. When the real mat
 roid Schubert variety comes from\na Coxeter arrangement\, we show that the
  equivariant fundamental group\nis a “virtual” analogue of the corresp
 onding Weyl group.
DTSTAMP:20260404T153346Z
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