Past Events
Scientific, Seminar
SCAIM Seminar: How fast can we multiply and divide polynomials?
October 27, 2009
University of British Columbia
Computer algebra systems like Maple and Mathematica spend most of their time doing either polynomial arithmetic or linear algebra. For polynomials in one variable of degree n, the Fast Fourier Transform gives us an O(n log n) multiplication algorithm...
Scientific, Seminar
Discrete Math Seminar: Estimating the entropy of Z^2 shifts of finite type
October 27, 2009
University of British Columbia
In symbolic dynamics, a Z^d shift of finite type (or SFT) is the set of all ways to assign elements from a finite alphabet A to all sites of Z^d, subject to local rules about which elements of A are allowed to appear next to each other. A fundamental...
Scientific, Seminar
Algebraic Geometry Seminar: Rigidity properties of Fano varieties
October 26, 2009
University of British Columbia
I will discuss some deformation properties of Fano varieties. The general methods rely on the investigation of the variation of the cone of effective curves and, more generally, of the Mori chamber decomposition, which, according to Mori theory...
Scientific, Seminar
2009 West Coast Optimization Meeting
October 25, 2009
Simon Fraser University
The West Coast Optimization Meeting has a long tradition as a regional meeting bringing together mathematicians working in optimization and related areas. It traditionally meets twice a year, once at the University of Washington, and once at UBC or...
Scientific, Seminar
Pacific Northwest Probability Seminar
October 24, 2009
University of Washington
Northwest Probability Seminars are one-day mini-conferences held at the University of Washington and organized in collaboration with the Oregon State University, the University of British Columbia, the University of Oregon, and the Theory Group at...
Scientific, Seminar
2009 UW-PIMS Colloquium - 04
October 23, 2009
University of Washington
When several large integers are added in the usual way 'carries' occur along the way. It is natural to ask: 'About how many carries are there and how are they distributed for typical numbers?' It turns out that these questions are intimately related...
Scientific, Seminar
Probability Seminar: Group Field Theory
October 21, 2009
University of British Columbia
Group field theory is the higher-dimensional generalization of random matrix models. As it has built-in scales and automatically sums over metrics and discretizations, it provides a combinatoric origin for space time. Its graphs facilitate a new...
Scientific, Seminar
SCAIM Seminar: Efficient High-Order Hybrid Elements for the Wave Equations
October 20, 2009
University of British Columbia
Gauss-Lobatto spectral elements, based on hexahedral meshes, provide a very efficient way to solve transient wave equations in terms of storage and of computational time. Unfortunately, it is very difficult and almost impossible in some cases to...
Scientific, Seminar
PIMS/WMAX Postdoctoral Colloquium: Parabolic systems with rough initial data
October 8, 2009
University of British Columbia
Abstract: Studying non-smooth geometric objects is a very important and modern research topic in differential geometry and geometric analysis. In particular it is interesting to know to which extent these objects can be approximated by smooth ones.In...
Scientific, Seminar
Topology Seminar: Survey of profinite homotopy theory
October 7, 2009
University of British Columbia