Forthcoming Seminars
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Tue, 16/11/2010 17:00 |
Andrea Carbonaro (Birmingham) |
Functional Analysis Seminar  |
L3 |
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Wed, 17/11/2010 10:15 |
Marcelo Epstein (University of Calgary) |
OCCAM Wednesday Morning Event |
OCCAM Common Room (RI2.28) |
| Modern differential geometry is the art of the abstract that can be pictured. Continuum mechanics is the abstract description of concrete material phenomena. Their encounter, therefore, is as inevitable and as beautiful as the proverbial chance meeting of an umbrella and a sewing machine on a dissecting table. In this rather non-technical and lighthearted talk, some of the surprising connections between the two disciplines will be explored with a view at stimulating the interest of applied mathematicians. | |||
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Wed, 17/11/2010 11:30 |
Elisabeth Fink (University of Oxford) |
Algebra Kinderseminar |
ChCh, Tom Gate, Room 2 |
| I am going to introduce Thompson's groups F, T and V. They can be seen in two ways: as functions on [0,1] or as isomorphisms acting on trees. | |||
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Wed, 17/11/2010 16:00 |
Gareth Davies (Oxford) |
Analytic Topology in Mathematics and Computer Science |
L3 |
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Thu, 18/11/2010 11:00 |
Franziska Jahnke (Oxford) |
Advanced Class Logic |
SR2 |
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Thu, 18/11/2010 11:00 |
Andreas Stordal (IRIS (Norway)) |
Applied Dynamical Systems and Inverse Problems Seminar |
DH 3rd floor SR |
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Thu, 18/11/2010 13:00 |
Stuart J Hall ((Imperial College, London)) |
Junior Geometry and Topology Seminar |
SR1 |
| I will begin by defining the space of algebraic metrics in a particular Kahler class and recalling the Tian-Ruan-Zelditch result saying that they are dense in the space of all Kahler metrics in this class. I will then discuss the relationship between some special algebraic metrics called 'balanced metrics' and distinguished Kahler metrics (Extremal metrics, cscK, Kahler-Ricci solitons...). Finally I will talk about some numerical algorithms due to Simon Donaldson for finding explicit examples of these balanced metrics (possibly with some pictures). | |||
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Thu, 18/11/2010 13:00 |
Jan Witte |
Mathematical Finance Internal Seminar |
DH 1st floor SR |
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Thu, 18/11/2010 14:00 |
Mr. Andreas Potschka (University of Heidelberg) |
Computational Mathematics and Applications |
Gibson Grd floor SR |
| Optimization problems with time-periodic parabolic PDE constraints can arise in important chemical engineering applications, e.g., in periodic adsorption processes. I will present a novel direct numerical method for this problem class. The main numerical challenges are the high nonlinearity and high dimensionality of the discretized problem. The method is based on Direct Multiple Shooting and inexact Sequential Quadratic Programming with globalization of convergence based on natural level functions. I will highlight the use of a generalized Richardson iteration with a novel two-grid Newton-Picard preconditioner for the solution of the quadratic subproblems. At the end of the talk I will explain the principle of Simulated Moving Bed processes and conclude with numerical results for optimization of such a process. | |||
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Thu, 18/11/2010 14:30 |
Susanne Danz (Oxford) |
Representation Theory Seminar |
L3 |
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Thu, 18/11/2010 16:00 |
Dr S Zwegers (University College, Dublin) |
Number Theory Seminar |
L3 |
| We consider certain q-series depending on parameters (A,B,C), where A is a positive definite r times r matrix, B is a r-vector and C is a scalar, and ask when these q-series are modular forms. Werner Nahm (DIAS) has formulated a partial answer to this question: he conjectured a criterion for which A's can occur, in terms of torsion in the Bloch group. For the case r=1, the conjecture has been show to hold by Don Zagier (MPIM and CdF). For r=2, Masha Vlasenko (MPIM) has recently found a counterexample. In this talk we'll discuss various aspects of Nahm's conjecture. | |||
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Thu, 18/11/2010 16:00 |
José Antonio Carrillo de la Plata (Universitat Autònoma de Barcelona) |
Differential Equations and Applications Seminar |
DH 1st floor SR |
| A kinetic theory for swarming systems of interacting individuals will be described with and without noise. Starting from the the particle model \cite{DCBC}, one can construct solutions to a kinetic equation for the single particle probability distribution function using distances between measures \cite{dobru}. Analogously, we will discuss the mean-field limit for these problems with noise. We will also present and analys the asymptotic behavior of solutions of the continuous kinetic version of flocking by Cucker and Smale The large-time behavior of the distribution in phase space is subsequently studied by means of particle approximations and a stability property in distances between measures. It will be shown that the solutions concentrate exponentially fast their velocity to their mean while in space they will converge towards a translational flocking solution. | |||
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Thu, 18/11/2010 17:00 |
Marcus Tressl (Manchester) |
Logic Seminar |
L3 |
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Fri, 19/11/2010 10:00 |
Various |
Industrial and Interdisciplinary Workshops |
DH 1st floor SR |
| This is the session for industrial sponsors of the MSc in MM and SC to present the project ideas for 2010-11 academic year. Potential supervisors should attend to clarify details of the projects and meet the industrialists. The schedule is 10am: Introduction; 10:05am David Sayers for NAG; 10:35am Andy Stove for Thales. | |||
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Fri, 19/11/2010 14:15 |
Guy Barles (Universite Francois Rablelais) |
Nomura Seminar |
DH 1st floor SR |
| Abstract: describe several results on the convergence of approximation schemes for possibly degenerate, linear or nonlinear parabolic equations which apply in particular to equations arising in option pricing or portfolio management. We address both the questions of the convergence and the rate of convergence. | |||
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Fri, 19/11/2010 14:30 |
Mark McGuinness (Victoria University of Wellington) |
Mathematical Geoscience Seminar |
DH 3rd floor SR |
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Mon, 22/11/2010 12:00 |
Sakura Schafer-Nameki (Kings College London) |
String Theory Seminar |
L3 |
| String theory phenomenology generically suffers from either too much flexibility (and lack of predictability) or from the a high specialization to case by case studies. I will discuss how F-theory GUT model building manages to get around these pitfalls, in particular, I will explain, how to systematically include global string consistency conditions, which are independent of the specific compactification, and which come with the benefit of highly constraining the class of GUT models that can arise from F-theory. | |||
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Mon, 22/11/2010 14:15 |
Zhiwei Yun (Princeton) |
Geometry and Analysis Seminar |
L3 |
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Mon, 22/11/2010 14:15 |
Neil O’Connell |
Stochastic Analysis Seminar |
Eagle House |
| We relate the partition function associated with a certain Brownian directed polymer model to a diffusion process which is closely related to a quantum integrable system known as the quantum Toda lattice. This result is based on a `tropical' variant of a combinatorial bijection known as the Robinson-Schensted-Knuth (RSK) correspondence and is completely analogous to the relationship between the length of the longest increasing subsequence in a random permutation and the Plancherel measure on the dual of the symmetric group. | |||
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Mon, 22/11/2010 15:45 |
Nicholas Touikan (Oxford) |
Topology Seminar |
L3 |
