## Scientific Lectures

- 11-Mar-08

Asymptotic Error Analysis of Finite Difference Methods

When computing approximations to PDE problems with smooth solutions using regular grids, the error has additional structure. For second order methods applied to elliptic or parabolic problems, an expansion for the error can be constructed t more››

University of British Columbia

- 11-Mar-08

- 10-Mar-08

Manipulating Thin-Film Flows: From Patterned Substrates to Evaporating Systems

Here we describe two variants of thin-film flows, one involving wetting and the other involving evaporation. First, we describe the spreading of mostly wetting liquid droplets on surfaces decorated with assemblies of micron-size cylindrical posts more››

University of British Columbia

- 10-Mar-08

Chern-Simons/Gromov-Witten duality

In this talk I hope to introduce Large N duality relating Chern-Simons gauge theory and Gromov-Witten theory. I will discuss some conjectures and theorems surrounding this subject and joint work with Sergiy Koshkin. more››

University of British Columbia

- 7-Mar-08

Giving the physics a chance: how to reduce the impact of numerical errors

Numerical errors are generally a bother, but in the case of adverse mobility ratio flows, such as those encountered when injecting water or gas (CO2) in oil reservoirs, they can be a real nuisance. In this talk we discuss the well-known grid more››

Simon Fraser University

- 7-Mar-08

Comparison of Misspecified Calibrated Models: The Minimum Distance Approach

This paper presents testing procedures for comparison of misspecified calibrated models. The proposed tests are of the Vuong-type (Vuong, 1989; Rivers and Vuong, 2002). In our framework, an econometrician selects values for more››

University of Victoria

- 6-Mar-08

The abelian/nonabelian correspondence in Gromov-Witten theory I

Given a "good" action of a reductive complex algebraic group G on a projective manifold X, the abelian/nonabelian correspondence refers to a precise relation that exists between topological invariants (cohomology, K-theory) of the Geomet more››

University of British Columbia

- 6-Mar-08

Microtubules are dynamic polymers found in all eukaryotic organisms that build the cellular machines that separate chromosomes, polarize the cytoplasm, direct expansion and divide cells. Interestingly, plant cells lack the central microtubule-orga more››

University of British Columbia

- 5-Mar-08

An update on spaces of embeddings

The Cerf-Morlet comparison theorem states that the group of diffeomorphisms of the compact n-ball which is the identity on the boundary is an (n+1)-fold loop space, whose (n+1)-fold de-looping is the homotopy-quotient of the group of the PL-homeom more››

University of British Columbia

- 4-Mar-08

Asymptotic stability of lattice solitons in the energy space

TBA more››

University of British Columbia

- 3-Mar-08

Asymptotic stability of lattice solitons in the energy space more››

University of British Columbia

- 3-Mar-08

A Compactification of the space of Maps from Curves

We will present a new compactification of the moduli space of maps from pointed nonsingular complex projective stable curves to a nonsingular complex projective variety with prescribed ramification indices at the points. It will be explained that more››

University of British Columbia

- 1-Mar-08

Optimal Strong Stability Preserving Time Discretizations more››

Simon Fraser University

- 29-Feb-08

Optimal Strong Stability Preserving Time Discretizations

Traditional stability concepts for ODE solvers typically deal with linear equations and/or bounds involving inner-product norms only. Modern problems of interest are typically nonlinear and in many casesthe relevant bounds for the problem inv more››

University of British Columbia

- 28-Feb-08

Primitive roots and the Euclidean algorithm

An integer s is called a primitive root modulo a prime p if the multiplicative set generated by s surjects onto all non-zero residue classes modulo p. Artin's primitive root conjecture states that all integers s other than -1 or squares are primitive more››

University of British Columbia

- 28-Feb-08

Eigenvalues of random matrices and not the Riemann Hypothesis

Random matrix theory has been a hot topic in number theory, particularly since the Rudnick and Sarnak landmark work on the spacing of consecutive zeros of L-functions. This highly accessible talk has a far more elementary flavour, focusing on eigenva more››

University of British Columbia

- 28-Feb-08

- 26-Feb-08

Regularity of optimal transportation maps more››

University of British Columbia

- 25-Feb-08

Theories of the General Ocean Circulation

University of British Columbia

- 22-Feb-08

Moving Unstructured Mesh Methods

Simulation of moving physical interfaces in 3-D is complicated by the need to (1) resolve complex realistic geometries with a spatial discretization, (2) accurately compute evolving physical fields on the discretization, and (3) evolve the di more››

Simon Fraser University