Past Events

E.g., Feb 18, 2025

Federico Scavia

CNRS and Université Sorbonne Paris Nord
Galois representations modulo p that do not lift modulo p^2

February 3, 2025

For every finite group H and every finite H-module A, we determine the subgroup of negligible classes in H^2(H,A), in the sense of Serre, over fields with enough roots of unity. As a consequence, we show that for every odd prime p and every field F containing a primitive p-th root of unity,... Read more

  • Algebra and Algebraic geometry

Davesh Maulik

MIT
D-equivalence conjecture for varieties of K3^[n]-type

February 3, 2025

The $D$-equivalence conjecture of Bondal and Orlov predicts that birational Calabi-Yau varieties have equivalent derived categories of coherent sheaves. I will explain how to prove this conjecture for hyperkahler varieties of $K3^{[n]}$ type (i.e. those that are deformation equivalent to Hilbert... Read more

  • Intercontinental Moduli and Algebraic Geometry Seminar

Federico Ardila

San Francisco State University
The geometry of matroids

January 31, 2025

ESB 2012 and Zoom

The theory of matroids originated in linear algebra and graph theory, and has deep connections with many other areas, including field theory, matching theory, submodular optimization, Lie combinatorics, and total positivity. Matroids capture the combinatorial essence that these different... Read more

Federico Ardila

San Francisco State University
The Combinatorics of CAT(0) Cube Complexes

January 30, 2025

Math 126

There are numerous contexts where a discrete system moves according to local, reversible moves. The configuration space, which contains all possible states of the system, is often a CAT(0) cube complex. When this is the case, we can use techniques from geometric group theory and poset theory to... Read more

  • Discrete mathematics

Anita Layton

University of Waterloo
The influence of sex and timing in physiological systems

January 28, 2025

MATH 126

Imagine someone having a heart attack. Do you visualize the dramatic Hollywood portrayal of a heart attack, in which a man collapses, grabbing his chest in agony? Even though heart disease is the leading killer of women worldwide, the misconception that heart disease is a men’s disease has... Read more

Dr. Brandon Schlomann


Illuminating within-host infection dynamics in space and time

January 28, 2025

Room 102: Lecture Theatre - Michael Smith Laboratories

A fundamental challenge in infection biology is predicting the dynamics of within-host microbial growth and immune activation. However, data typically comes as static snapshots, limiting our ability to test theories. Therefore, we established live imaging of a powerful model organism: the larval... Read more

  • Mathematical Biology

Sebastien Picard

UBC
Calabi-Yau threefolds crossing nodal singularities

January 27, 2025

Math 126

We will review the conifold transition, which is a topological surgery for Calabi-Yau threefolds. The process involves a deformation of complex structure and a small resolution of nodal singularities. We discuss the geometrization of this process and its study by complex analytic and... Read more

  • Algebra and Algebraic geometry

Anita Layton

University of Waterloo
We are all different: Modeling key individual differences in physiological systems

January 27, 2025

ANGU 347 and Zoom

Mathematical models of whole-body dynamics have advanced our understanding of human integrative systems that regulate physiological processes such as metabolism, temperature, and blood pressure. For most of these whole-body models, baseline parameters describe a 35-year-old young adult man who... Read more

Milind Hegde

Columbia University
Scaling limits of geodesics and upper tail asymptotics in the directed landscape

January 21, 2025

MATH 126

Two central objects in the Kardar-Parisi-Zhang universality class are the Airy process and the directed landscape. The latter can be thought of as the negative of a random directed metric space (i.e., paths are directed and have weights, which are maximized to give geodesics), and the former as... Read more

  • Probability

Dr. Chadi Saad-Roy


Mathematical models to untangle infectious disease eco-evolutionary dynamics across scales

January 21, 2025

Room 102: Lecture Theatre - Michael Smith Laboratories

Infectious diseases are complex systems across many scales. In this talk, I will use mathematical models to investigate a range of cross-scale questions in infectious disease eco-evolutionary dynamics. I will begin by modelling the transition from pathogen emergence to endemicity, landscapes of... Read more

  • Mathematical Biology