Past Events

E.g., Jun 14, 2024

Augustin Lafay

Aalto University
Web models as a generalization of O(N) loop models

May 13, 2024

UBC

In this talk, I will present results obtained in physics on so called web models. Web models are two dimensional lattice models defined from some graphs called webs that arose in representation theory. The A1 case recovers the well-known O(N) loop model on the hexagonal lattice. After reviewing... Read more

  • Probability

Ian Cavey

UIUC
Verlinde Series for Hirzebruch Surfaces

May 13, 2024

Verlinde series are generating functions of Euler characteristics of line bundles on the Hilbert schemes of points on a surface. Formulas for Verlinde series were determined for surfaces with $K=0$ by Ellingsrud, Göttsche, and Lehn. More recently, Göttsche and Mellit determined Verlinde series... Read more

  • Intercontinental Moduli and Algebraic Geometry Seminar

Edgar Knobloch

UC Berkeley
Propagation failure, and intermittent spiking in Meinhardt's model of sidebranching

May 8, 2024

ESB 4133

In this talk I will describe some properties of Meinhardt's model of sidebranching. This is a four-species reaction-diffusion model dating from 1976 describing the interaction of four fields, the concentrations of an activator, an inhibitor, the substrate, and a marker for differentiation. The... Read more

  • Mathematical Biology

Stève Cyrille Kenne

Universite des Antilles
A nested model with boosting and waning of immunity from an infection with distributed resistance to pathogens carrier-state: Application to the Tilapia Lake Virus.

April 22, 2024

ESB 4133 (PIMS Lounge)

This work proposes and analyzes an immune-structured population model of tilapia subject to Tilapia Lake Virus (TiLV) disease. The model incorporates within-host dynamics, used to describe the interaction between the pathogen, the immune system and the waning of immunity. Individuals infected... Read more

Sarah Dijols

UBC
Generic representations and ABV-packets for $p$-adic groups

April 18, 2024

ESB 4133

After a brief introduction on the theory of $p$-adic groups complex representations, I will explain why tempered and generic Langlands parameters are open. I will further derive a number of consequences, in particular for the enhanced genericity conjecture of Shahidi and its analogue in terms of... Read more

  • Number Theory

Gabor Csanyi

University of Cambridge
A foundational atomistic model for materials

April 15, 2024

ESB 1012

A new computational task has been defined and solved over the past 15 years for extended material systems: the analytic fitting of the Born-Oppenheimer potential energy surface as a function of nuclear coordinates. The resulting potentials ("force fields") are reactive, many-body, with... Read more

Miguel Moreira

MIT
The cohomology ring of moduli spaces of 1-dimensional sheaves on the projective plane

April 15, 2024

The cohomology of moduli spaces of 1-dimensional sheaves, together with a special filtration called the perverse filtration, can be used to give an intrinsic definition of (refined) Gopakumar-Vafa invariants. While there are methods to calculate the Betti numbers of these moduli spaces in low... Read more

  • Intercontinental Moduli and Algebraic Geometry Seminar

Benjamin Anderson-Sackaney

University of Saskatchewan
From Groups to Quantum Groups and Their Operator Algebras

April 12, 2024

ESB 1012 (PIMS building)

Every group admits a faithful unitary representation on some Hilbert space. In other words, every group can be realized concretely as symmetries on a Hilbert space. From these representations we can construct certain operator algebras known as C*-algebras. These group C*-algebras enable an... Read more

Ling Long

Louisiana State University
Hypergeometric functions through the arithmetic kaleidoscope

April 11, 2024

ESB 4133

The classical theory of hypergeometric functions, developed by generations of mathematicians including Gauss, Kummer, and Riemann, has been used substantially in the ensuing years within number theory, geometry, and the intersection thereof. In more recent decades, these classical ideas have... Read more

  • Number Theory

Alexander Zimin

MIT
Inequalities in Graph Percolation

April 10, 2024

Percolation on a graph is a random process that divides the edges into two groups: open and closed. Events such as "vertices v and w are connected via a path of open edges" occur within this process. We investigate the dependencies between these events and inequalities concerning their... Read more

  • Probability