Past Events
Scientific, Seminar
Probability Seminar: Gradient Gibbs distribution with non-convex potential at high temperature
March 24, 2010
University of British Columbia
We consider a gradient Gibbs measure with non convex potential and show that it behaves at high temperature like a gaussian free field. The proof is based on the fact that the marginal distribution of the even sites has a strictly convex Hamiltonian...
Scientific, Seminar
Nonlinear waves: from beaches to lasers
March 23, 2010
University of Saskatchewan
The study of localized waves has a long history dating back to the discoveries in the 1800s by Russell, Boussinesq and Korteweg-deVries(KdV) describing water waves in shallow water. In the 1960s researchon the KdV equation led to the concept of...
Scientific, Seminar
Discrete Math Seminar: Rational Distances with Rational Angles
March 23, 2010
University of British Columbia
Given n points in the real plane, the unit distance problem asks for an asymptotic upper bound on the number of unit distances between pairs of the points. We consider this problem under the restriction that the line segments between the points make...
Scientific, Seminar
Applied Mathematics Seminar: Moving Frames in Applications
March 19, 2010
University of Saskatchewan
The classical method of moving frames was developed by Elie Cartan into a powerful tool for studying the geometry of submanifolds under certain geometrical transformation groups. In this talk, I will present a new foundation for moving frame theory...
Scientific, Seminar
WENTS Seminar: A New Construction of the Tame Local Langlands Correspondence for GL(n,F), n a prime
March 19, 2010
University of Calgary
In my thesis, I give a new construction of the tame local Langlands correspondence for GL(n,F), n a prime. The Local Langlands Correspondence for GL(n,F) has been proven recently by Henniart, Harris/Taylor. In the tame case, supercuspidal...
Scientific, Seminar
Topology Seminar: Fault-tolerant cluster state quantum computation, and how homology helps describing it
March 17, 2010
University of British Columbia
I discuss a scheme of fault-tolerant quantum computation which is driven by local projective measurements on an entangled quantum state of many qubits, a so-called cluster state. There are two fundamentally different ways of evolving quantum states...
Scientific, Seminar
Mathematical Biology Seminar: Microtubule assembly dynamics at the nanoscale
March 17, 2010
University of British Columbia
Microtubules are intracellular polymers that dynamically grow and shorten at their ends via the stochastic addition and loss of αβ-tubulin heterodimers, a highly regulated process that underlies many fundamental cellular processes, including...
Scientific, Seminar
Optimal conditions for the extension of the mean curvature flow
March 16, 2010
University of British Columbia
In this talk, we will discuss several optimal (global) conditions for the existence of a smooth solution to the mean curvature flow. Our focus will be on quantities involving only the mean curvature. We will also discuss several applications of a...
Scientific, Seminar
Chaotic gradient descent methods give the conjugate gradient method a run for its money
March 16, 2010
University of British Columbia
The conjugate gradient (CG) algorithm is usually the method of choice for the solution of large symmetric positive definite linear systems Ax=b. If however the matrix-vector products Av required at each iteration can not be calculated accurately, the...
Scientific, Seminar
Discrete Math Seminar: Computing solution concepts in games with integer decisions
March 16, 2010
University of Alberta
I discuss algorithms and complexity results for two game theoretic extensions of integer programming: integer programming games and bilevel integer programming. In the case of integer programming games, I discuss an algorithm which computes pure Nash...