Past Events

Abstract: The development of quantum electrodynamics is one of the major achievements of theoretical physics and mathematics of the 20th century, called the "Jewel of physics" by Richard Feynman. This talk is not about that. Instead, I explain two of...

In the classical pointwise ergodic theorem for a probability measure preserving (pmp) transformation \(T\), one takes averages of a given integrable function over the intervals \(\{x, T(x), T^2(x), \ldots, T^n(x)\}\) in the forward orbit of the point...

The asymmetric exclusion process (ASEP) is a model of particles hopping on a one-dimensional lattice. While it was initially introduced by Macdonald-Gibbs-Pipkin to provide a model for translation in protein synthesis, the stationary distribution of...

The $s$-colour size-Ramsey number of a hypergraph $H$ is the minimum number of edges in a hypergraph $G$ whose every $s$-edge-colouring contains a monochromatic copy of $H$. We show that the $s$-colour size-Ramsey number of the $t$-power of the $r$...

Recently we proved a theorem for strongly regular graphs that provides numerical restrictions on the number of fixed vertices and the number of vertices mapped to adjacent vertices under an automorphism. We then used this result to develop some new...

Decision-makers attempting to restrict the spread of forest pests through infested firewood imported as a result of decisions of the population of park users must contend with population behaviour that both causes pest outbreaks, and responds to them...

It has been just over one year and 100 million cases since we first heard of a novel coronavirus with pandemic potential. We are now all far too familiar with epidemic curves and would very much like to see the tail of this one. In this talk, I will...

Given a collection of points S in a metric space and a probability p in (0,1), one can make a random graph by independently joining any pair of points in S that are less than 1 apart by an edge with probability p; and no edge with probability 1-p...

What have I learned about building mathematical communities over the last twenty years, initially in North America and more recently in Africa and South America? What does “belonging” mean to those who are already part of a mathematical community...

Cops and Robber is a well-studied pursuit-evasion game played on graphs. In this talk, I’ll discuss a variation of the game with a new capture condition. Instead of a win for the cop side resulting from at least one of the cops occupying the same...