Forthcoming Seminars
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Mon, 11/10/2004 14:15 |
Professor Sylvie Meleard (Universite Paris 10) |
Stochastic Analysis Seminar  |
DH 3rd floor SR |
| We are interested in a microscopic stochastic description of a population of discrete individuals characterized by one adaptive trait. The population is modeled as a stochastic point process whose generator captures the probabilistic dynamics over continuous time of birth, mutation and death, as influenced by each individual's trait values, and interactions between individuals. An offspring usually inherits the trait values of her progenitor, except when a mutation causes the offspring to take an instantaneous mutation step at birth to new trait values. Once this point process is in place, the quest for tractable approximations can follow different mathematical paths, which differ in the normalization they assume (taking limit on population size , rescaling time) and in the nature of the corresponding approximation models: integro or integro-differential equations, superprocesses. In particular cases, we consider the long time behaviour for the stochastic or deterministic models. | |||
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Mon, 11/10/2004 14:15 |
Pelham Wilson (Cambridge) |
Geometry and Analysis Seminar |
L3 |
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Mon, 11/10/2004 15:30 |
Mirna Dzamonja (U.E.A.) |
Analytic Topology in Mathematics and Computer Science |
L3 |
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Mon, 11/10/2004 15:45 |
Professor N H Bingham (University of Sheffield) |
Stochastic Analysis Seminar |
DH 3rd floor SR |
| Joe Doob, who died recently aged 94, was the last survivor of the founding fathers of probability. Doob was best known for his work on martingales, and for his classic book, Stochastic Processes (1953). The talk will combine an appreciation of Doob's work and legacy with reminiscences of Doob the man. (I was fortunate to be a colleague of Doob from 1975-6, and to get to know him well during that year.) Following Doob's passing, the mantle of greatest living probabilist descends on the shoulders of Kiyosi Ito (b. 1915), alas now a sick man. | |||
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Mon, 11/10/2004 17:00 |
Professor Ioan James (Oxford) |
Topology Seminar |
L3 |
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Mon, 11/10/2004 17:00 |
Peter Lax (Courant Institute) |
Applied Analysis and Mechanics Seminar |
L1 |
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Tue, 12/10/2004 12:00 |
Michael Berry (Bristol) |
Quantum Field Theory Discussions |
L3 |
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Tue, 12/10/2004 15:00 |
Professor Peter Lax (Courant Institute) |
Special Lecture |
L1 |
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Tue, 12/10/2004 17:00 |
Marianna Csornyei (UCL) |
Functional Analysis Seminar |
L3 |
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Tue, 12/10/2004 17:00 |
Dr Nikolay Nikolov (Oxford) |
Algebra Seminar |
L1 |
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Wed, 13/10/2004 14:00 |
Professor Peter Lax (Courant Institute) |
Special Lecture |
L1 |
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Wed, 13/10/2004 15:30 |
Professor Peter lax (Courant Institute) |
Special Lecture |
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Thu, 14/10/2004 14:00 |
Prof Kevin Burrage (University of Queensland / Oxford) |
Computational Mathematics and Applications |
Comlab |
| A cell is a wonderously complex object. In this talk I will give an overview of some of the mathematical frameworks that are needed in order to make progress to understanding the complex dynamics of a cell. The talk will consist of a directed random walk through discrete Markov processes, stochastic differential equations, anomalous diffusion and fractional differential equations. | |||
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Thu, 14/10/2004 14:30 |
Karin Erdmann (Oxford) |
Representation Theory Seminar |
L3 |
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Thu, 14/10/2004 16:30 |
Gregory Kozyreff and John Ockendon (OCIAM) |
Differential Equations and Applications Seminar |
DH Common Room |
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Thu, 14/10/2004 16:30 |
Neil Dummigan (Sheffield) |
Number Theory Seminar |
L3 |
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Fri, 15/10/2004 14:00 |
Lisa Borland (Evnine-Vaughan Associates Inc, USA) |
Mathematical Finance Seminar |
DH 2nd floor SR |
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Fri, 15/10/2004 14:00 |
Dr Nico Scheerlinck (Lab of Postharvest Technology, Catholic University of Leuven) |
Mathematical Biology Seminar |
SR1 |
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Fri, 15/10/2004 15:15 |
Alex Wilkie (Oxford) |
Logic Seminar |
SR1 |
| The first seminar will be given with the new students in mind. It will begin with a brief overview of quantifier elimination and its relation to the back-and-forth property.I shall then discuss complexity issues with particular reference to algebraically closed fields.In particular,how much does the height and degree of polynomials in a formula increase when a quantifier is eliminated? The precise answer here gave rise to the definition of a `generic' transcendental entire function,which will also be discussed. | |||
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Mon, 18/10/2004 14:15 |
Dr J Trashorras (University Paris 9) |
Stochastic Analysis Seminar |
DH 3rd floor SR |
| The Hopfield model took his name and its popularity within the theory of formal neural networks. It was introduced in 1982 to describe and implement associative memories. In fact, the mathematical model was already defined, and studied in a simple form by Pastur and Figotin in an attempt to describe spin-glasses, which are magnetic materials with singular behaviour at low temperature. This model indeed shows a very complex structure if considered in a slightly different regime than the one they studied. In the present talk we will focus on the fluctuations of the free energy in the high-temperature phase. No prior knowledge of Statistical mechanics is required to follow the talk. | |||
