Past Events at the University of British Columbia

The University of British Columbia PIMS site office is located in the Earth Sciences Building at the University of British Columbia (Map | Contact).

 

Past Events

  • 8-Mar-07

Risk management for a hydro-based generator

This talk will cover some of the practical applications of risk analysis and hedging programs for a hydro-based energy generator such as BC Hydro. Risk management for BCH provides a unique challenge due to the significant variability in available   more››

Scientific Event

  • 7-Mar-07

Symmetric Markov chains on Z^d with unbounded range

We consider symmetric Markov chains on ^d where we allow arbitrarily large jumps. Under a uniform second moment condition on the conductances, we look at estimates on the transition probabilities, Harnack inequalities, and CLTs. This is joint wor   more››

Scientific Event

  • 7-Mar-07

Identifications in Modular Group Algebras

Let G be a finite p-group and F a field of characteristic p>0. In this talk I shall explain how Lie theoretic methods can be used to identify certain subgroups of G inside the augmentation ideal of the group algebra FG.   more››

Scientific Event

  • 2-Mar-07

Stable seismic data recovery

In this paper, directional frames, known as curvelets, are used to recover seismic data and images from noisy and incomplete data. Sparsity and invariance properties of curvelets are exploited to formulate the recovery by a $\ell_1$-norm promoting   more››

Scientific Event

  • 2-Mar-07
  • 4-Mar-07
  • 1-Mar-07

Almost-primes represented by quadratic polynomials

Dirichlet's theorem on primes in arithmetic progressions characterizes those linear polynomials which take on prime values infinitely often. However, this is where the current state of knowledge ends. For the case of polynomials with higher degree   more››

Scientific Event

  • 1-Mar-07

Goldton-Yildirim-Pintz and small gaps between primes

I'll give an expository talk, following the recent article of Soundararajan, on the theorem of Goldston, Yildirim, and Pintz that there are infinitely many primes p such that the next prime q satisfies q – p = o(log p).   more››

Scientific Event

  • 28-Feb-07

On Card Shuffling

I will talk about some famous results of Bayer and Diaconis (1992) which permit a rigorous answer to the following question: given a deck of n cards, how many times should it be shuffled so that the deck is in approximately random order? The goal   more››

Scientific Event

  • 27-Feb-07

Littlewood-Richardson coefficients: Reduction formulae and a conjecture by King, Tollu and Toumazet

Littlewood-Richardson coefficients are structural constants of the cohomology ring of Grassmannians and the ring of Schur functions, and they are counted by the number of skew tableaux with certain properties. In this talk, we introduce well   more››

Scientific Event

  • 27-Feb-07

Detecting Spillover: A dynamical systems modeling approach to glutamatergic synaptic signaling

The connectivity of neurons in the hippocampus depends in part on whether neurotransmitter from one release site can leak out and activate receptors in another synapse or extrasynaptic patch. The existence of such 'spillover' is under debate in th   more››

Scientific Event

  • 23-Feb-07

Twisted K-theory (old and new), Part II

Twisted K-theory in terms of Banach algebras and Fredholm operators in an Hilbert space. Some computations.   more››

Scientific Event

  • 21-Feb-07

Twisted K-theory (old and new), Part I

The Brauer group of a space and of a finite group. How are they related to K-theory?   more››

Scientific Event

  • 16-Feb-07

Homological Stability, Part II

Homological stability theorems have been proved for many families of groups like symmetric groups, linear groups, mapping class groups of surfaces and of 3-manifolds. I will review some examples and explain how such theorems are proved. As a more   more››

Scientific Event

  • 16-Feb-07

Smooth Surfaces and Sharp Junctions

Because of their ability to form blends, respond to contact and produce both organic shapes as well as man made objects, implicit surfaces have the potential for uses other than the traditional clouds and water droplets. Models can be built with e   more››

Scientific Event

  • 15-Feb-07

On Robust Utility Maximization

We study the problem of optimal investment in incomplete markets, robust with respect to stopping times. We work on a Brownian motion framework and the stopping times are adapted to the Brownian filtration. Robustness can only be achieved for loga   more››

Scientific Event

  • 14-Feb-07

The lace expansion and the enumeration of self-avoiding walks

The lace expansion is an elegant combinatorial construction that provides a recursion relation for the number of self-avoiding walks. We first give an introduction to the lace expansion, and then explain how it has been used recently (in joint wor   more››

Scientific Event

  • 14-Feb-07

Homological Stability, Part I

Homological stability theorems have been proved for many families of groups like symmetric groups, linear groups, mapping class groups of surfaces and of 3-manifolds. I will review some examples and explain how such theorems are proved. As a more   more››

Scientific Event