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This Week's Seminars

Time and Date: 3:00-4:00 p.m., Wednesday, April 22, 2009
Event: Topology Seminar / Colloquium
Speaker: Jon Carlson, University of Georgia
Subject:``Modules of constant Jordan type''
Location: WMAX 110 (PIMS)
Abstract: This is joint work with Eric Friedlander, Julia Pevtsova and Andrei Suslin. We consider modules over an elementary abelian group on which every element in the radical, but not the square of the radical, has the same Jordan canonical form. Such modules can be used to define bundles on projective spaces and Grassmanians. They have many interesting properties. We can get them as submodules of any module of the group algebra. In this talk I will discuss some of the constructions and their generalizations.
There will be tea and cookies in the PIMS 1st floor lounge at approximately 2:45pm.

Time and Date: 2:00-3:00 p.m., Thursday, April 23, 2009
Event: Mathematical Biology Seminar
Speaker: Bahman Davoudi Dehaghi, BC Centre for Disease Control
Subject:``Early Real-time Estimation of the Basic Reproductive Number''
Location: WMAX 216 (PIMS)
Abstract: The basic reproductive number, R_0, which is generally defined as the expected number of secondary infections per primary case in a totally susceptible population, is an important epidemiological quantity. It helps us to understand the possible outcome of an initial infection seeding in a social setting: whether it leads to a small outbreak, or it evolves into a large-scale epidemic. The basic reproductive number encapsulates the information about the biology of disease transmission as well as the structure of human social contacts. We use concepts from network theory to present a novel method for estimating the value of the basic reproductive number during the early stage of an outbreak. This approach will greatly enhance our ability to reliably estimate the level of threat caused by an emerging infectious disease.

Time and Date: 3:00-4:00 p.m., Thursday, April 23, 2009
Event: Probability Seminar
Speaker: Daniel Conus, University of Utah
Subject:``The non-linear wave equation in high dimensions: existence, Holder-continuity and Ito-Taylor expansion''
Location: WMAX 216 (PIMS)

Please e-mail all seminar notices to artuso(at)
by 3:00 p.m., Wednesday.