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DTSTART:20230312T070000
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DTSTART:20221106T060000
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URL:https://uwaterloo.ca/combinatorics-and-optimization/events/algebraic-co
 mbinatorics-seminar-lucas-gagnon
SUMMARY:Algebraic Combinatorics Seminar - Lucas Gagnon
CLASS:PUBLIC
DESCRIPTION:TITLE: Quasisymmetric varieties\, excedances\, and bases for th
 e\nTemperley--Lieb algebra\n\nSpeaker:\n Lucas Gagnon\n\nAffiliation:\n Yo
 rk University\n\nLocation:\n MC 6029 please contact Olya Mandelshtam for Z
 oom link\n\nABSTRACT:  This talk is about finding a _quasisymmetric\nvar
 iety_ (QSV): a subset of permutations which (i) is a basis for the\nTempe
 rley--Lieb algebra TL_n(2)\, and (ii) has a vanishing ideal (as\npoints in
  n-space) that behaves similarly to the ideal generated by\nquasisymmetric
  polynomials.   While this problem is primarily\nmotivated by classical (
 co-)invariant theory and generalizations\nthereof\, the course of our inve
 stigation uncovered a number of\nremarkable combinatorial properties relat
 ed to our QSV\, and I will\nsurvey these as well. 
DTSTAMP:20260418T162430Z
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