Past Events

Given an affine space of matrices L and a matrix Θ ∈ L, consider the problem of computing the closest rank deficient matrix to Θ on L with respect to the Frobenius norm. This is a nonconvex problem with several applications in control theory...

Optimal transportation, at its core, is a powerful framework for obtaining structured yet general couplings between general probability measures based on matching underlying characteristics. This framework lends itself naturally to applications in...

We define vertex-colourings for edge-coloured digraphs, which unify the theory of P-partitions and proper vertex-colourings of graphs. We use our vertex-colourings to define generalized chromatic functions, which merge the chromatic symmetric and...

In this talk, we will consider Riemannian metrics with scalar curvature bounded from below and discuss the possible behavior of the sequence under various non-collapsing assumption. This is based on joint works with A. Naber, R. Neumayer, P. Topping...

Space-time finite element methods (FEMs) are likely to grow in popularity due to the ongoing growth in the size, speed, and parallelism of modern computing platforms. The allure of space-time FEMs is both intuitive and practical. From the intuitive...

Kemeny's constant is an interesting and useful quantifier of how well-connected the states of a Markov chain are. Though it was first introduced in the 1960s, interest in this concept has recently exploded. This talk will provide an introduction to...

Prediction systems face exogenous and endogenous distribution shift -- the world constantly changes, and the predictions the system makes change the environment in which it operates. For example, a music recommender observes exogeneous changes in the...

The behavior of quadratic twists of modular L-functions at the critical point is related both to coefficients of half integer weight modular forms and data on elliptic curves. Here we describe a proof of an asymptotic for the second moment of this...

Random geometric graphs were invented by E.N. Gilbert in 1961 to model communications networks. Bootstrap percolation was invented by Chalupa, Leath and Reich in 1979 to model magnetism. Both models have since been used to study many other things...

The ribosome exit tunnel is a sub-compartment of the ribosome that contains the nascent polypeptide chain and as such, is involved in the regulation of translation other essential functions such as protein folding. Analyzing and comparing the...