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Durham University

Research & business

Research lectures, seminars and events

The events listed in this area are research seminars, workshops and lectures hosted by Durham University departments and research institutes. If you are not a member of the University, but  wish to enquire about attending one of the events please contact the organiser or host department.


 

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Events for 3 February 2020

Joseph Walker: Cornering Charming Higgs Decays

12:00am, OC218

This talk discusses on how to identify events with fatjets from charming Higgs decays, H→cc, at the LHC. To reduce the overwhelmingly large backgrounds and to reduce false positives, we consider applying a combination of jet shape observables and imaging techniques, using a selection of neural network architectures.

Contact Daniel Martin for more information about this event.


Alpár Mészáros: Global well-posedness of master equations for deterministic potential Mean Field Games

1:00pm, CM101

In this talk we propose an approach to construct global in time solutions to master equations arising in the theory of Mean Field Games. In our models, the strategies of the agents are completely deterministic. The master equation (an infinite dimensional nonlocal Hamilton-Jacobi equation set on the space of Borel probability measures) was introduced by P.-L. Lions and fully characterizes the Nash equilibria described in mean field games. For these problems only short time existence results were available thanks to the works of Gangbo-Świech (2015) and Mayorga (2019). Due to the lack of regularization effects (in the absence of noise) the recent results by Cardaliaguet-Delarue-Lasry-Lions (who establish well-posedness of master equations involving individual and/or common noises) cannot be applied for our problems. Our techniques are variational and we heavily rely on tools from the theory of optimal transport. The core idea is to study the appropriate regularity properties of classical solutions to Hamilton-Jacobi equations set on infinite dimensional spaces. The so-called displacement convexity properties of the data will play a crucial role in our analysis. The talk is based on an ongoing joint work with Wilfrid Gangbo (UCLA).

The talk will be aimed for a general mathematical audience and no prior knowledge on game theory, PDEs or optimal transportation is assumed.

Contact michael.r.magee@durham.ac.uk for more information about this event.


IAS Fellows' Seminar - Towards a physics of death: learning from nature's circular economy

1:00pm to 2:00pm, Seminar Room, Institute of Advanced Study, Professor Wilson Poon (University of Edinburgh)

Contact enquiries.ias@durham.ac.uk for more information about this event.


Alex Watson: Long-term behaviour of growth-fragmentation processes

1:00pm, CM107

Growth-fragmentation processes describe the evolution of systems of
cells which grow continuously and fragment suddenly. They are used in
models of cell division and protein polymerisation. In the long term,
the concentrations of cells with given masses typically increase at some
exponential rate and, after compensating for this, they arrive at an
asymptotic profile. Up to now, this has mainly been studied for the
average behaviour of the system, often by means of a natural partial
integro-differential equation and the associated spectral theory.
However, the behaviour of the system as a whole, rather than only its
average, is more delicate. Under certain conditions, we show that the
entire collection of cells converges to a certain asymptotic profile.
Joint work with Jean Bertoin.

Contact ellen.g.powell@durham.ac.uk for more information about this event.


Prof. Thomas O’Loughlin: The Protevangelium of James

3:30pm, Seminar Room C (D/TH107), Dept. of Theology & Religion, Abbey House, DH1 3RS, Durham

Contact francis.watson@durham.ac.uk for more information about this event.


Science, society and environmental change in the first millennium CE - Lecture: Viking-Age Iceland: Managing Environmental Change in a Knowledge-Based Society

4:00pm to 5:30pm, Seminar Room, Institute of Advanced Study, Dr. Karen Milek, Department of Archaeology, Durham University

Contact h.g.foxhallforbes@durham.ac.uk; karen.b.milek@durham.ac.uk for more information about this event.


IAS Fellow's Public Lecture - Participatory Data Design: Acting in a digital world

5:30pm to 6:30pm, Senior Common Room, College of St Hild and St Bede, Professor Torben Elgaard Jensen (Aalborg University)

Contact enquiries.ias@durham.ac.uk for more information about this event.