# Prof. Terry Lyons FLSW FRSE FRS

University of Oxford

Andrew Wiles Building

Radcliffe Observatory Quarter

Woodstock Road

Oxford

OX2 6GG

*Lyons, T*

*Qian, Z*

*(2002)*

I am the Wallis Professor of Mathematics; I was a founding member (2007) of, and then Director (2011-2015) of, the Oxford Man Institute of Quantitative Finance; I was the Director of the Wales Institute of Mathematical and Computational Sciences (WIMCS; 2008-2011). I came to Oxford in 2000 having previously been Professor of Mathematics at Imperial College London (1993-2000), and before that I held the Colin Maclaurin Chair at Edinburgh (1985-93).

My long-term research interests are all focused on Rough Paths, Stochastic Analysis, and applications - particularly to Finance and more generally to the summarsing of large complex data. That is to say I am interested in developing mathematical tools that can be used to effectively model and describe high dimensional systems that exhibit randomness. This involves me in a wide range of problems from pure mathematical ones to questions of efficient numerical calculation.

*Lyons, T*

*Margarint, V*

*Nejad, S*

*Statistics and Probability Letters*

*volume 205*

*(01 Feb 2024)*

*Cass, T*

*Lyons, T*

*Xu, X*

*Annals of Applied Probability*

*volume 34*

*issue 1A*

*585-626*

*(28 Jan 2024)*

*Lyons, T*

*Ni, H*

*Tao, J*

*(04 Jan 2024)*

*Tseriotou, T*

*Chan, R*

*Tsakalidis, A*

*Bilal, I*

*Kochkina, E*

*Lyons, T*

*Liakata, M*

*(06 Dec 2023)*

*Rader, J*

*Lyons, T*

*Kidger, P*

*(28 Nov 2023)*

*Krones, F*

*Walker, B*

*Parsons, G*

*Lyons, T*

*Mahdi, A*

*Proceedings of the 50th Computing in Cardiology Conference (CinC 2023)*

*volume 50*

*1-4*

*(26 Nov 2023)*

*Kern, H*

*Lyons, T*

*(20 Oct 2023)*

*Ibraheem, R*

*Wu, Y*

*Lyons, T*

*dos Reis, G*

*Applied Energy*

*volume 352*

*(28 Sep 2023)*

learning to assist in tracing infectious disease

*Ibrahim, M*

*Lyons, T*

*(24 Aug 2023)*

*http://arxiv.org/abs/2308.12840v1*

Bank Loan Problem

*Gal, E*

*Singh, S*

*Pacchiano, A*

*Walker, B*

*Lyons, T*

*Foerster, J*

*(15 Aug 2023)*

*http://arxiv.org/abs/2308.08051v1*

*Tseriotou, T*

*Tsakalidis, A*

*Foster, P*

*Lyons, T*

*Liakata, M*

*Findings of the Association for Computational Linguistics: ACL 2023*

*5016-5031*

*(05 Aug 2023)*

*Salvi, C*

*Diehl, J*

*Lyons, T*

*Preiss, R*

*Reizenstein, J*

*Journal of Algebra*

*(01 Aug 2023)*

*Bayer, C*

*Breneis, S*

*Lyons, T*

*(24 Jul 2023)*

*http://arxiv.org/abs/2307.12590v1*

*Friz, P*

*Lyons, T*

*Seigal, A*

*(30 May 2023)*

*http://arxiv.org/abs/2305.19210v1*

*Walker, B*

*Krones, F*

*Kiskin, I*

*Parsons, G*

*Lyons, T*

*Mahdi, A*

*(26 May 2023)*

*Hayakawa, S*

*Lyons, T*

*Oberhauser, H*

*Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences*

*(17 May 2023)*

*Hayakawa, S*

*Oberhauser, H*

*Lyons, T*

*Proceedings of Machine Learning Research*

*volume 202*

*12678-12699*

*(08 May 2023)*

*Fermanian, A*

*Chang, J*

*Lyons, T*

*Biau, G*

*(04 Apr 2023)*

Approach

*Horvath, B*

*Lemercier, M*

*Liu, C*

*Lyons, T*

*Salvi, C*

*(04 Apr 2023)*

Stochastic analysis. This is the area of mathematics relating to the rigorous description of high-dimensional systems that have randomness. It is an area of wide-reaching importance. Virtually all areas of applied mathematics today involve considerations of randomness, and a mobile phone would not work without taking advantage of it. Those who provide fixed-rate mortgages have to take full account of it. My interests are in identifying the fundamental language and the basic results that are required to model the interaction between highly oscillatory systems where the usual calculus is inappropriate. If you google ‘Rough Paths’ and ‘Lyons’ you will find further information. My St Flour Lecture notes provide a straightforward technical introduction with all the details put as simply as possible. A more general introduction can be found in my talk/paper to the European Mathematical Society in Stockholm in 2002.

My approach is that of a pure mathematician, but my research has consequences for numerical methods, finance, sound compression and filtering. At the moment I am (speculatively) exploring their usefulness in understanding sudden shocks on dynamical systems, and also trying to understand the implications for geometric measure theory. The focus of my research directed to ‘Rough paths’ can be viewed as a successful approach to understanding certain types of non-rectifiable currents.

I actively look for applications in the mathematics I do, but my experience has led me to believe strongly in the importance of being rigorous in the development of the core mathematical ideas. For me, the word proof is synonymous with the more palatable ‘precise, convincing and detailed explanation’, and I believe it is important, even essential, to find rigorous proofs of the key mathematical intuitions so that mathematics can reliably grow and ideas can be passed on to the next generation.