Past Events

Alternating sign matrices (ASMs) were introduced by Robbins and Rumsey in the early 1980s. Together with Mills they conjectured an enumerative formula for the number of ASMs of size n×n, which was proved independently by Zeilberger and Kuperberg...

In the past decade, (artificial) neural networks and machine learning tools have surfaced as game changing technologies across numerous fields, resolving an array of challenging problems. Even for the numerical solution of partial differential...

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...

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...

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...

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...