## Scientific Lectures

- 12-Sep-06

Subfactors and (1+1)-dimensional TQFTs (Part 1)

In this joint work with Vijay Kodiyalam (IMSc, Chennai) and Vishwambhar Pati (ISI, Bangalore), we construct a certain 'cobordism category' D whose morphisms are suitably decorated cobordism classes between similarly decorated closed oriented 1-man more››

University of British Columbia

- 11-Sep-06

Linearly reductive finite group schemes

I will report on joint work with Dan Abramovich and Martin Olsson. We classify linearly reductive finite group schemes in positive or mixed characteristic, and use this to define a good replacement for the notion of orbifold in positive or mixed c more››

University of British Columbia

- 5-Sep-06

Prime numbers, Riemann, and Langlands

Prime numbers have held a mystery over number theory since before Euclid. To introduce a powerful new tool to the subject, Riemann defined his analytic zeta function; with it, he described the Prime Number Theorem and conjectured Riemann's Hypothe more››

University of British Columbia

- 30-Aug-06

Geometric flow in Kahler manifold

We will discuss some recent results on the Calabi flow, short time existence, stability and extension theorem. The Calabi flow is a 4th order parabolic flow which is gradient flow of certain convex functional in infinite dimensional space. If we h more››

University of British Columbia

- 22-Aug-06

Characterizing projective spaces

University of British Columbia

- 9-Aug-06

CECM, Maplesoft, MITACS, IRMACS and PIMS are pleased to present "CECM 2006", a summer conference hosted by CECM under the title "Summer Workshop on Computational Mathematics" at Simon Fraser University. The Workshop more››

Simon Fraser University

- 18-Jul-06

Heisenberg-Weyl groups and their application to sequence design

We will describe how Heisenberg-Weyl groups appear in the construction of phase coded radar waveforms, in the design of spreading sequences in wireless communications, and in the theory of classical and quantum error-correcting codes. Interesti more››

Simon Fraser University

- 18-Jul-06

A rare event for students (undergraduate and graduate) to meet two of the most acclaimed mathematical scientists of our time. PIMS invites you to attend a special informal question & answer session with these speakers after their lectures, to be more››

Simon Fraser University

- 18-Jul-06

Wavelets are a new approach used in the analysis of sounds and images, as well as in many other applications. The wavelet transform provides a mathematical analog to a music score: just as the score tells a musician which notes to play whe more››

Simon Fraser University

- 12-Jul-06

Some arithmetic problems raised by rabbits, cows and the Da Vinci Code

In 1202, the Italian mathematician Leonardo da Pisa, alias Fibonacci, introduced a sequence of numbers that nowadays bears his name. Under the assumption that rabbits breed (producing a pair of rabbits) when more››

Simon Fraser University

- 12-Jul-06

Gravitational allocation of Lebesgue measure to Poisson points

University of British Columbia

- 11-Jul-06

The Physics of Eternity Recent evidence points to an open universe, where time might run forever. If we take the current laws of physics, and run things forward, what could we see of the far future? We find some predictions out to 10**15 years are fa more››

Simon Fraser University

- 7-Jul-06

Polynomials, Permutations, Prime Ideals, and factoring Polynomials modulo p

The talk began as an attempt to answer the following question - if f(x) is an irreducible polynomial with integer coefficients, does it remain irreducible modulo p for infinitely many primes p? It turns out that the answer is sometimes yes and som more››

Simon Fraser University

- 27-Jun-06

On the Untraced Second Bianchi Identities in General Relativity

Einstein's equations set space-time curvature traces proportional to the space-time's mechanical content expressed as a stress- energy tensor. The divergence of a stress-energy tensor is the external force density acting on the matter described by th more››

Simon Fraser University

- 22-Jun-06

Modelling homotopy n-types in algebraic topology and category theory

Homotopy n-types are topological spaces with trivial homotopy groups in dimension greater than n. They arise naturally in algebraic topology and category theory. Both these areas of mathematics have seen the development of models of n-types. In th more››

University of British Columbia

- 21-Jun-06

Several mathematical models of snow crystal growth will be discussed. For a popular class of cellular automata known as Packard's Snowflakes, one can develop a fairly complete rigorous theory, addressing limiting density, fractal shapes and more››

University of British Columbia

- 13-Jun-06

Relativistic Wave equations in Discrete phase space

A new representation of quantum mechanics involving finite difference operators will be presented. Relativistic lattice Klein-Gordon equation, Dirac equation, and Maxwell's equations as partial difference equations will be discussed. It is proved tha more››

Simon Fraser University

- 6-Jun-06

Quantification of Blow-up Levels for a 2-D Elliptic Equation with Critical Exponential Nonlinearity

We study sequences of solutions of some elliptic PDE’s, on 2-dimensional bounded domain, with critical Moser-Trudinger exponential nonlinearity. We prove that lack of compactness occur only when standard bubbles appear and thus we can quantify t more››

University of British Columbia

- 5-Jun-06

Stochastic PDEs for Sampling Conditioned SDEs

Stochastic PDEs for Sampling Conditioned SDEs more››

Simon Fraser University

- 5-Jun-06

Large Inverse Problems and Infinite Dimensional Sampling: Stochastic PDE for Sampling Conditioned SD

There are a variety of important applications which may be formulated as inverse problems where the object of interest is the time-dependent solution of a dynamical system. Examples include the sampling of rare events in molecular dynamics, data assi more››

Simon Fraser University