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CSDC

The Centre for Systems, Dynamics and Control in the Department of Mathematics at the University of Exeter is a focus for interdisciplinary research on the modelling of complex systems, dynamical systems, control theory and their applications.

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Dynamical Systems Meeting April 11-12: Probabilistic methods for non-stationary dynamical systems

3rd Apr, 2023 / Leave a comment

There will be dynamical systems meeting April 11-12 on the topic of Probabilistic methods for non-stationary dynamical systems. On Tuesday 13:30 – 17:15 we will have talks from Damien Thomine, Alexey Korepanov and Douglas Coates, held in Amory C501 (schedule, titles and abtracts bellow). On Wednesday 10:00-12:00 we will have an informal discussion on open problems in the area, short contributions of ~10-15mins to this session would be very welcome. If there is a problem or a topic which you would like to discuss during the Wednesday session, or you would like more information about the meeting please contact one of the organisers Mark Holland (), or Douglas Coates ().

Tuesday 11th April (13:30 – 17:15):

– 13:30-14:30 Damien Thomine (Universite Paris-Saclay). An application of the probabilistic potential theory to dynamical systems.

The probabilistic potential theory is the probabilistic counterpart of the classical potential theory, or in other words of the study of harmonic functions and their relations to probability theory. This theory offers the tools to compute transition probabilities for random walks, and for more general Markov chains. For instance, given any finite number of states, we can find the one the Markov chain is most likely to hit first.

In this talk, we shall present a dynamical variant of this question, that is, the computation of transition probabilities for extensions of measure-preserving dynamical systems. We shall show how one may recover these transitions probabilities in an asymptotic regime, using very diverse tools : transfer operators, metastable states, and perturbation of eigenvalues among others.

– 14:40-15:40 Alexey Korepanov (Loughborough). Loss of memory in nonstationary and mean-field-coupled intermittent dynamical systems.

I’ll talk about establishing optimal rates of decay of correlations and about moment bounds for sequential dynamics built with Liverani-Saussol-Vaienti maps (our pandemics-time project with Juho Leppänen), and about its recent application to mean-field-coupled systems (joint work with Wael Bahsoun).

– 15:40-16:15 Break

– 16:15-17:15 Douglas Coates (Exeter). “Persistent” non-statistical behaviour for interval maps with neutral fixed points

I will present recent work joint with Stefano Luzzatto in which we study a class F of full branched maps admitting two indifferent fixed points as well as critical points and/or unbounded derivative. We introduce a natural topology on the class F and show that there is a dense subset G of maps which are non-statistical (and in particular which have no physical measure). Moreover, we show that the non-statistical behaviour of the maps in G is “persistent” under a particular class of perturbations.

Wednesday 12th (10:00-12:00) informal discussion on open problems.

News and visitors

27th Jan, 2023 / Leave a comment

We welcome Dr George Datseris who has won a Royal Society Newton Internation Fellowship hosted at the University of Exeter for the next two years. We also welcome Andreas Morr who will be visiting from PIK (Postdam) from January to April 2023.

Mathematics in Life Science meeting on “Linking Mathematics, Experiments and Data.” 8-9th March 2023

26th Jan, 2023 / Leave a comment

We are pleased to announce the programme for the fifteenth Mathematics in Life Sciences (MiLS) meeting.

The meeting will focus on “Linking mathematics, experiments and data” and will take place on the 8-9th March 2023 from 11:30 (8th March) to 13:30pm (9th March) in the Harrison Building. Attendance to the meeting is free of charge, but we kindly ask you to register your intention to attend by filling out the registration form here: https://forms.office.com/e/dvFcGyKgmx

We are planning to have a poster session on 8th March. If you are interested in presenting a poster, please let us know when emailing to register.

This meeting is generously supported by the London Mathematical Society and the EPSRC Hub for Quantitative Modelling in Healthcare.

Programme

8th March am – Harrison 209

11:30 Arrival and coffee

11:45 Prof. Simon Schultz (Imperial College London)
“Neural manifold analysis of brain circuit dynamics in health and disease”

12:30 Catered lunch

8th March pm – Harrison 103

13:30 Dr Lucia Marucci (University of Bristol)
“Programming cells: from models to data and back”

14:15 Prof. Orkun Soyer (University of Warwick)
“Co-substrate dynamics in metabolism: from theory to experiments?”

15:00 Tea & coffee

15:30 Prof. Thomas Nowotny (University of Sussex)
“Testing mathematical models in hybrid systems experiments.”

16:15 Poster session

18:00 Pub trip

9th March – Harrison 170

09:30 Prof. Aneta Stefanovska (Lancaster University)
“Is non-autonomous dynamics in mathematics sufficient to describe open systems in physics? Lessons from cellular, cardiovascular and brain dynamics”

10:15 Discussion session & breakout on opportunities and challenges in integrating experiments and models

11:00 Tea & coffee

11:30 Rebecca Poon (University of Exeter)
“Dynamics of ciliary coordination in marine invertebrate larvae.”

12:15 Catered lunch

13:30 Close

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