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DTSTART:20240310T070000
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DTSTART:20241103T060000
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DTSTART;TZID=America/Toronto:20250130T140000
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URL:https://uwaterloo.ca/combinatorics-and-optimization/events/algebraic-an
 d-enumerative-combinatorics-seminar-nantel
SUMMARY:Algebraic and enumerative combinatorics seminar-Nantel Bergeron
CLASS:PUBLIC
DESCRIPTION:TITLE: Equivariant quasisymmetry\n\nSpeaker\n Nantel Bergeron\n
 \nAffiliation\n York University \n\nLocation\n MC 5479\n\n ABSTRACT: We i
 ntroduce equivariant quasisymmetry\, a version of\nquasisymmetry for polyn
 omials in two sets of variables. Using this\ndefinition we define double f
 undamental polynomials and double forest\npolynomials\, a quasisymmetric g
 eneralizations of the theory of double\nSchur and double Schubert polynomi
 als\, where the subset of noncrossing\npermutations play the role of $S_n$
 .This combinatorics is governed by\nthe quasisymmetric flag variety\, a ne
 w geometric construction which\nplays the role for equivariant quasisymmet
 ry what the usual flag\nvariety plays in the classical story.\n\nIn this t
 alk\, I will focus on the combinatorial aspect first\, and with\nthe remai
 ning time discuss the geometrical implications.\n\nTHERE WILL BE A PRE-SEM
 INAR PRESENTING RELEVANT BACKGROUND AT THE\nBEGINNING GRADUATE LEVEL START
 ING AT 1PM\,
DTSTAMP:20260403T083403Z
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