Scientific Lectures

  • 13-Mar-08

Explicit Solutions of Consumption-Investment Problems in Financial Markets with Regime Switching

We consider a financial market with different regimes that are modeled through an observable continuous-time finite-state Markov chain. The rates of returns and volatilities of the market investing assets, the bank interest rate and the investors' ut   more››

University of British Columbia

  • 13-Mar-08

Character varieties of hyperbolic knot complements

To every hyperbolic 3-manifold M with nonempty boundary, one can associate a pair of related algebraic varieties X(M) and Y(M) called the character varieties of M. These varieties carry much topological info   more››

Simon Fraser University

  • 13-Mar-08

The Steinberg symbol and special values of L-functions

In this talk, we will describe a construction of Eisenstein classes in the parabolic cohomology of Γ0(M) with values in Milnor's K2-group of the ring of S-integers of the cyclotomic extension Q(   more››

Simon Fraser University

  • 13-Mar-08

The abelian/nonabelian correspondence in Gromov-Witten theory II

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

  • 11-Mar-08

Systems of HJB equations

University of British Columbia

  • 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

2008 DG-MP-PDE Seminar-07

Systems of HJB equations   more››

University of British Columbia

  • 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

Dynamic Properties of Microtubules in Plant Cells, with Implications for Spatial Organization, Growth and Development

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
  • 3-Mar-08

2008 DG-MP-PDE Seminar-06

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

2008 PIMS-CSC Seminar - 03

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