Past Events

A diffusion-type operator biologically significant in neuroscience is a difference of Gaussian functions used as a spatial-convolution kernel (Mexican-Hat operator). We are interested in the dynamics inherent in a neural structure such as visual...

Which 3-manifolds smoothly embed in the 4-sphere? This seemingly simple question turns out to be rather subtle. Using Donaldson's theorem, we derive strong restrictions to embedding a Seifert fibered space over an orientable base surface, which in...

Inspired by a problem in joint source-channel coding, we introduce a new notion of similarity between graphs, termed graph information ratio. We discuss various properties of this measure, including in particular metric structure and partial ordering...

A double occurrence word w is a word (sequence of letters) in which each of its letters occurs exactly twice. Legal 2-coloring of w is a colouring of individual letters such that each letter occurs once red and once blue. Our goal is to find for a...

In 1971, Ruzsa conjectured that if f: N→Z with f(n+k)≡f(n) mod k for every n,k∈N and f(n)=O(θn) with θ

The PIMS-Math Job Forum is an annual Forum to help graduate students and postdoctoral fellows in the Mathematics Department with their job searches. The session is divided in two parts: short presentations from our panel followed by a discussion...

Northwest Probability Seminars are mini-conferences held at the University of Washington and organized in collaboration with the Oregon State University, the University of British Columbia and the University of Oregon. There is no registration fee...

The "doubling property" refers to the property (of a metric measure space) that max{Vol(B(x,2r))/Vol(B(x,r)): r>0} is bounded. We consider the following question: do we have good control of the doubling property for left-invariant geometries on a...

The SIAM Pacific Northwest Section (PNWS) holds a meeting every two years; this upcoming meeting is the second such meeting, and one of the main events organized by the SIAM PNWS. It provides a valuable opportunity for mathematicians with connections...

The regularity problem for the Navier-Stokes equation is one of the biggest open problems in nonlinear PDE. In this talk, I will use the evolution equations for the strain and vorticity to derive an identity for enstrophy growth that depends only on...