Past Events
Scientific, Distinguished Lecture
Math Biology Seminar: Biological aggregation patterns and the role of social interactions
October 22, 2009
University of British Columbia
Biological aggregations such as insect swarms, bird flocks, and fish schools are arguably some of the most common and least understood patterns in nature. In this talk, I will discuss recent work on swarming models, focusing on the connection between...
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, Distinguished Lecture
Algebraic Geometry Seminar: The zero locus of an admissible normal function
October 19, 2009
University of British Columbia
If H is a variation of Hodge structure over a variety S, then there is a family of complex tori J(H) over S associated to H. Admissible normal functions are certain sections of J(H) over S. Roughly speaking, they are the ones that have the...
Scientific, Conference
2009 Northwest Functional Analysis Seminar
October 16–18, 2009
University of Alberta
The Northwest Functional Analysis Seminar (NWFAS) is a bi-annual regional scientific meeting of researchers (faculty and postdoctoral) and graduate students in functional analysis. Participants are drawn from universities in Western Canada and the...
Scientific, Distinguished Lecture
PIMS-CSC Seminar: Measuring the phonetic similarity between speech sounds
October 16, 2009
Simon Fraser University
This talk demonstrates a new metric for measuring phonetic similarity between speech sounds, based on several types of phonetic data collected for a set of 130 consonants and vowels. Phonetic similarity is frequently invoked for explaining a wide...
Scientific, Distinguished Lecture
Topology Seminar: Equivariant Lefschetz invariants via analysis
October 15, 2009
University of British Columbia
Equivariant Lefschetz invariants have already appeared in algebraic topology. Here I will show how to approach them using the so-called equivariant KK-theory of Kasparov — the main tool of the new field of noncommutative geometry. I will sketch the...
Scientific, Distinguished Lecture
Probability Seminar: Combinatorics and Cluster Expansions
October 14, 2009
University of British Columbia
Scientific, Distinguished Lecture
Topology Seminar: The moduli spaces of generalized Morse functions
October 14, 2009
University of British Columbia
We study and determine a homotopy type of the moduli space of all generalized Morse functions on d-manifolds for given d. This moduli space is closely connected to the moduli space of all Morse functions studied by Madsen and Weiss and classifying...
Scientific, Distinguished Lecture
SCAIM Seminar: Iterative regularization or inverse problems
October 13, 2009
University of British Columbia
After an introduction on Tikhonov regularization for linear inverse problems, we will encounter an example from inverse electromyography, where the classical Tikhonov method runs into numerical trouble. We will then look at an alternative approach...