Past Events

It is well-known that a closed convex set C containing the origin in its interior can be represented as the 1-sublevel set of its gauge function. If the set C is compact, then the gauge is the unique sublinear function whose 1-sublevel coincides with...

We investigate the scaling limit of the range (the set of visited vertices) for a general class of critical lattice models, starting from a single initial particle at the origin. Conditions are given on the random sets and an associated ``ancestral...

The talk will be devoted to a simple introduction to stochastic PDEs (SPDEs) driven by Wiener processes, including both forward and backward (in time) cases. Some motivations, as well as the duality relationship between forward and backward SPDEs...

Cutting plane techniques are key to solving large scale optimization problems with mixed-integer variables. Modern approaches to cutting plane theory shows that the concept of sublinearity is a unifying way to organize these ideas. This leads to a...

The standard iterative methods for solving linear and nonlinear systems of equations are all synchronous, meaning that in the parallel execution of these methods where some processors may complete an iteration before other processors (for example...

One of the goals of quantum information theory is to understand quantum systems from the standpoint of computational complexity. How difficult is it to compute fundamental properties of a quantum system or simulate a particular system over time...

What happens when you add up the divisors of an integer? This seemingly innocuous question has motivated mathematicians across the ages, from antiquity to the present day. In this talk, we'll survey some conjectures and results on the functions s(n)...

The Winter 2018 SFU/UBC Joint Seminar is the second of two seminars taking place in the 2017/2018 school year between the UBC department of Statistics and the SFU department of Statistics and Actuarial Science. It is intended to give graduate...

If E is a compact set of Hausdorff dimension s > 1 on the plane, then its distance set was conjectured (by Falconer 1985) to have positive Lebesgue measure. Joint with Guth, Iosevich and Ou, we show that dim E > 5/4 is a sufficient condition. This...

A connection is a geometric object that allows to parallel transport vectors along a curve in a domain. A natural question that often arises is whether one can recover a connection inside a domain from the knowledge of the parallel transport along a...