Past Events

Spitzer (1958) showed that the trace of reflected Brownian motion on the upper half space on its boundary is a Cauchy process. More generally, every symmetric stable process in n-dimensional Euclidean space can be obtained as a trace process of a...

Recent advances in computational transport have led to powerful applications in various domains. We will present here two recent methods and algorithms that leverage the evaluation of Wasserstein distances and barycentric projections from transport...

In various contexts explicit formulas relate sums over primes (eg: numbers or ideals) to sums over zeros of some corresponding L-function(s). The aim of this talk is to explain how we tightly approximate these sums over zeros in the context where one...

This talk will primarily be on a generalization of the so-called "HKR theorem". The classical HKR theorem concerns two different ways of generalizing the notion of differential forms on a ring; the theorem asserts they agree. I will give a...

A classical result of Papadimitriou from 1982 states that integer optimization problems in standard form can be solved in running time $\max{\|b\|_\infty, \Delta}^{O(m^2)}$ where $m$ denotes the number of equations of the given system, $\Delta$ is...

In this talk, I will present a recent work in which two co-authors and myself studied the behaviour of a local algorithm optimizing the weight of a graph. More precisely, the process starts with a given subgraph H of the complete graph with uniform...

On Feb 13, J. Campion Loth gave the Discrete Math seminar on "Symmetry of Star Factorisations", where he focused on the combinatorial aspects of these objects and related factorisation problems. In this talk, we will look at these objects, which I...

TBA

In a linear population model that has a unique “largest” eigenvalue and is suitably irreducible, the corresponding left and right (Perron) eigenvectors determine the long-term relative prevalence and reproductive value of different types of...