Past Events

Abstract: I will explain an interpretation of Illusie's results on the deformation theory of commutative rings in terms of the cohomological classification of torsors and gerbes. Then I'll show how this point of view can be used to solve some other...

A one-dimensional shift of finite type (SFT) is the set of infinite sequences that do not contain, as a sub-word, any finite word in a given finite list. These systems are ubiquitous as models of dynamical systems and also as constraints imposed on...

We will prove that solutions to the defocusing energy-critical Schrodinger equations are global in the hyperbolic space H^3. The relevance of the energy-critical case is that in this case, one needs to understand how to take into account the scaling...

I will first give a gentle introduction to LS category and then review some of the progress that has been made over the last 10 years in connection with Iwase's counterexample to Ganea's conjecture. This will include many problems that are still open...

an activity of the PIMS L-functions and number theory collaborative research group

Abstract: The Langlands correspondence relates global Galois representations with automorphic representations; the local correspondence works at each prime. For any reductive group $G$ over a local field $K$ we construct a complex reductive group $...

This talk is directed to non-specialists and students. The Metropolis is a very famous algorithm which can used to simulate random variables. The Ising model is a model coming from statistical physics. After defining the notions needed, I will...

The reconstruction problem on the tree concerns the propagation of information in Markov processes on trees and has been studied in probability, statistical physics, computational biology, information theory and theoretical computer science. I will...

Efforts to control the Mountain Pine Beetle infestation in British Columbia and Alberta include large-scale landscape manipulations such as clearcutting, and cost-intensive techniques such as green attack tree removal. Unfortunately, it is unclear...