Vertex Models and Special Functions Seminar Fall 2021

Last Updated:

The goal of this seminar is to understand some examples in which vertex models give insight on the study of special functions, especially Macdonald polynomials.

Time and location information

Organisers: Sam DeHority, Zoe Himwich, Davis Lazowski
Time/date: Thursdays 5-6pm EST
Location: Hybrid in Math 528 / on Zoom

Please email himwich@math.columbia.edu if you would like to be on the mailing list.

Plan/references

First, we will cover necessary background on MacDonald polynomials, vertex models and DAHA, following (for instance)

Then we will focus on the box-ball system, following

Afterwards, depending on attendee interest, we will move on to several other related systems, for instance those of

Virtual attendance

This seminar will be hybrid. If you are interested in attending virtually, please let us know when you ask to be on the mailing list. (If interest from attendees at other universities is especially high, it’s possible that the seminar might move entirely online.)

List of talks

Date Talk Info
Thursday
Sep. 9
Speaker: Zoe Himwich
Title: DAHA and Macdonald Polynomials
Thursday
Sep. 16
NO TALK
Thursday
Sep. 23
Speaker: Zoe Himwich
Title: Continued
Thursday
Sep. 30
Speaker: Davis Lazowski
Title: Crystals and box-ball systems
Abstract: I will give a basic introduction to crystals and how they arise from the theory of quantum groups. Then we’ll use that to study associated dynamical systems, notably the box-ball system.
Thursday
Oct. 7
Speaker: Sam DeHority
Title: The Toda lattice and its ultradiscretization
Abstract: The Toda lattice is an example of a classical integrable system. I will describe this system and some of its solutions, then discuss its ultradiscretization, which is a certain tropical limit of the system and is related to box ball systems.
Notes: pdf
Thursday
Oct. 14
Doubleheader
First Sam continues from last week, and then Davis will speak on the following “I will briefly prove that the combinatorial R matrix describes soliton-soliton scattering”
Thursday
Oct. 21
Speaker: Zoe Himwich
Title: The 6-Vertex Model and ASEP
Abstract: I will define vertex models and ASEP, show the correspondence between the Stochastic 6 Vertex Model’s height function and ASEP. If time permits, I will start to introduce https://arxiv.org/abs/1904.06804.
Thursday
Oct. 28
Speaker: Zoe Himwich
Title: Multiline Queues and MacDonald Polynomials
Abstract: I will begin to go through a paper of Corteel, Mandelshtam, and Williams which uses multiline queues to produce a new formula for Macdonald polynomials.
Thursday
Nov. 4
Speaker: Zoe Himwich
Title: Multiline Queues and MacDonald Polynomials
Abstract: I will continue my presentation of a paper of Corteel, Mandelshtam, and Williams which uses multiline queues to produce a new formula for Macdonald polynomials.
Thursday
Nov. 11
Speaker: Davis Lazowski
Title: A vertex model for MacDonald polynomials
Abstract: I will explain how a matrix product ansatz for stationary states of the asymmetric exclusion process motivated a vertex model construction of MacDonald polynomials.
Thursday
Nov. 18
Speaker: Sam DeHority
Title: Towards R matrices associated to elliptic surfaces
Abstract: We will discuss work in progress which produces solutions to the Yang-Baxter equation from moduli spaces associated to elliptic surfaces. The relevant geometric objects will be introduced and then an outline of the R matrix construction will be presented.
Thursday
Dec. 2
NO TALK
Thursday
Dec. 9
Speaker: Sam DeHority
Title: Towards R matrices associated to elliptic surfaces II
Abstract: Continuing from last time, we will discuss work in progress which produces solutions to the Yang-Baxter equation from moduli spaces associated to elliptic surfaces. The relevant geometric objects will be introduced and then an outline of the R matrix construction will be presented.
Thursday
Dec. 16
Speaker: Davis Lazowski
Title: Baxter’s Q-operator and representation theory
Abstract: I will explain how Baxter’s Q-operator can be understood in terms of prefundamental modules for the shifted quantum affine algebra.