Past Events

We introduce the notion of a fat staircase and define when a skew diagram D is a sum of fat staircases. We give a collection of Schur-positivity results that may be obtained from each sum of fat staircases. Further, we determine conditions on when a...

Subcellular oscillations of Min proteins within individual cells of E. coli serve to localize division to midcell. While significant progress has been made to understand the Min oscillation both experimentally and in modeling, I will present three...

Free probability is a variation of probability theory for matrix valued random variables. It has many aspects: combinatorial, analytic, theoretical, and applied. I will discuss a problem on a graph of matrices arising from a random matrix problem in...

Define $e_{n}(t)=\{t/n\}$. Let $d_N$ denote the distance in $L^2(0,\infty ; t^{-2}dt)$ between the indicator function of $[1,\infty[$ and the vector space generated by $e_1, \dots, e_N$. A theorem of B\'aez-Duarte (2003) states that the Riemann...

In this hastily prepared talk, I will describe some preliminary results of Nathan Ng and myself that concern linear dependencies (with integer coefficients) among zeros of Dirichlet L-functions. We can show, for example, that given a Dirichlet L...

Wood is nature’s solution to the structural and hydraulic problems faced by the World’s largest living organisms-trees. The solutions to these problems are both elegant and energy efficient and are starting to inspire new (biomimetic) approaches to...

Let \gamma be a smooth closed curve of length 2\pi in R^3, and let \kappa(s) be its curvature regarded as a function of arc length s. We associate with this curve the one-dimensional Schroedinger operator H_\gamma = -d^2/ds^2 + \kappa^2(s) acting on...

Let F be a kxl (0,1)-matrix. We say that a (0,1)-matrix A has F as a `configuration' if some row and column permutation of F is a submatrix of A. We are interested in `simple' matrices, namely (0,1)-matrices with no repeated columns. If A is a simple...

The Twenty Second Annual Pacific Northwest Numerical Analysis Seminar will be hosted by the The University of British Columbia. If you plan to attend, please register below in advance so that we can order refreshments accordingly. Registration fees...