Past Events

One way to define an integer polymatroid ρ is via its independent set polytope, whose faces are parallel translations of the independent set polytopes of the minors of ρ. To better understand the interior of this polytope, we endow a structure on...

In this talk, I will discuss a long-standing problem on type II singularity of Ricc flow. First I recall some known results on long-time behavior of Ricci flow, then I will present our solution to the above problem. I may also discuss a related...

We'll talk about a piece of mathematics bringing together number theory (Ivan Niven's subject), geometry, and dynamical systems, that exemplify many of the things I love about math - community, diversity, collaboration, beautiful images, and an...

This event will be a special iteration of the Western Canada Linear Algebra Meeting (WCLAM) to honour Peter Lancaster at 95. There is a large and thriving Linear Algebra community in Western Canada, where there is ongoing research in matrix analysis...

Over the past few years, operator learning – the approximation of mappings between infinite dimensional function spaces using ideas from machine learning – has attracted increased research attention. Approximate operators, learned from data, hold...

Optimal transport operates on empirical distributions which may contain acquisition artifacts, such as outliers or noise, thereby hindering a robust calculation of the OT map. Additionally, it necessitates equal mass between the two distributions...

In this talk, we consider colored permutation groups ℤm≀Sn, which contain the symmetric groups Sn≅ℤ1≀Sn and the signed symmetric groups Bn≅ℤ2≀Sn as special cases. Like in Sn, colored permutations in ℤm≀Sn have a notion of cycle type that classifies...

We will consider the inverse problem of determining the sound speed or index of refraction of a medium by measuring the travel times of waves going through the medium. This problem arises in global seismology in an attempt to determine the inner...

Given a prime power q≡1(mod4), the Paley graph of order q is the graph defined over 𝔽q (the finite field with q elements), such that two vertices are adjacent if and only if their difference is a square in 𝔽q. A clique in the Paley graph over 𝔽q is a...

Reaction-diffusion systems serve as paradigms to describe ubiquitous pattern formation phenomena arising from natural science and social science such as biology, ecology, finance,etc., and have been extensively studied over the past several decades...