The Algebraic Combinatorics Workgroup

Scheduled for Fridays at 3:15 PM (EDT [GTM -4]),

#### Schedule FALL 2022
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#### Schedule WINTER 2023
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A working seminar (at) of the Fields Institute organized by
Nantel Bergeron
and Kelvin Chan.

Date Speaker Title (click titles for abstract) Sept 2 Lucas Gagnon (York), Anthony Aurthur Lazzeroni Jr (HKBU), Farhad Soltani (York), Nantel Bergeron (York) First Meeting. Icebreaker and Problem Suggestions A few people will present some icebreaker talks and suggest some open problems.Sept 9 Farhad Soltani (York) DQSYM I will be talking about quasisymmetric polynomials on two sets of variables and the coinvariant space.Sept 16 Lucas Gagnon (York) Chromatic quasisymmetric functions and representation theory This talk will explore several topics related to the chromatic symmetric function and its quasisymmetric q-analogue. First, I will use them as a way to reviewt (quasi-)symmetric functions and some of their properties. Then, I will talk about some representation theoretic interpretations for symmetric functions generally, and the chromatic quasisymmetric function in particular.Sept 23 Anthony Aurthur Lazzeroni Jr (HKBU) The ideal of r-quasisymmetric functions In this talk I will recall the space of r-quasisymmetric functions. These spaces are nested subHopf algebras that interpolates between the space of Quasisymmetric functions and Symmetric functions. I will also discus some previous results about the quotient ring of the polynomial ring and the ideal generated by non-constant homogenous quasisymmetric functions.Sept 30 (tentative) Alan Lao (York) TBD Oct 1 Oct 7 Oct 14 Oct 21 Oct 28 Nov 4 Nov 11 Nov 18

- This is in collaboration with the Fields Institute.
- If you are interested in speaking at the seminar, contact Nantel Bergeron.
- You may also be interested in the Applied Algebra Seminar (Monday afternoons at York University).

** About the seminar. **
Every year we pick a new topics to explore.