Forthcoming Seminars

Please note that the list below only shows forthcoming events, which may not include regular events that have not yet been entered for the forthcoming term. Please see the past events page for a list of all seminar series that the department has on offer.

Past events in this series
Today
14:15
to
15:45
ILYA CHEVYREV
Abstract

Yang-Mills theory plays an important role in the Standard Model and is behind many mathematical developments in geometric analysis. In this talk, I will present several recent results on the problem of constructing quantum Yang-Mills measures in 2 and 3 dimensions. I will particularly speak about a representation of the 2D measure as a random distributional connection and as the invariant measure of a Markov process arising from stochastic quantisation. I will also discuss the relationship with previous constructions of Driver, Sengupta, and Lévy based on random holonomies, and the difficulties in passing from 2 to 3 dimensions. Partly based on joint work with Ajay Chandra, Martin Hairer, and Hao Shen.

  • Stochastic Analysis & Mathematical Finance Seminars
Today
15:45
GONCALO DOS REIS
Abstract


We present several Itô-Wentzell formulae on Wiener spaces for real-valued functionals random field of Itô type depending on measures. We distinguish the full- and marginal-measure flow cases. Derivatives with respect to the measure components are understood in the sense of Lions.
This talk is based on joint work with V. Platonov (U. of Edinburgh), see https://arxiv.org/abs/1910.01892.
 

  • Stochastic Analysis & Mathematical Finance Seminars
Tomorrow
09:00
to
31 March 2020
18:00
Roger Penrose

Further Information: 

As you might expect from a man whose family included the Surrealist artist Roland Penrose, Roger Penrose has always thought visually. That thinking is captured brilliantly in this selection of Roger’s drawings that he produced for his published works and papers.

From quasi-symmetric patterns to graphic illustrations of the paradoxical three versions of reality via twistor theory and the brain, this selection captures the stunning range of Roger’s scientific work and the visual thinking that inspires and describes it.

Mezzanine Level
Mathematical Institute
Oxford

10 December 2019- 31 March 2020

Tomorrow
12:00
Samuel Martin-Gutierrez
Abstract

Political polarization generates strong effects on society, driving controversial debates and influencing the institutions. Territorial disputes are one of the most important polarized scenarios and have been consistently related to the use of language. In this work, we analyzed the opinion and language distributions of a particular territorial dispute around the independence of the Spanish region of Catalonia through Twitter data. We infer a continuous opinion distribution by applying a model based on retweet interactions, previously selecting a seed of elite users with fixed and antagonist opinions. The resulting distribution presents a mainly bimodal behavior with an intermediate third pole that appears spontaneously showing a less polarized society with the presence of not only antagonist opinions. We find that the more active, engaged and influential users hold more extreme positions. Also we prove that there is a clear relationship between political positions and the use of language, showing that against independence users speak mainly Spanish while pro-independence users speak Catalan and Spanish almost indistinctly. However, the third pole, closer in political opinion to the pro-independence pole, behaves similarly to the against-independence one concerning the use of language.

Ref: https://www.nature.com/articles/s41598-019-53404-x



 

Tomorrow
17:00
Chris Budd

Further Information: 

For our popular Christmas lecture this year Chris Budd will give a seasonal talk with a number of light hearted applications of mathematics to the
festive season. 

Chris is currently Professor of Applied Mathematics at the University of Bath, and Professor of Geometry at Gresham College. He is a passionate populariser of mathematics and was awarded an OBE in 2015 for services to science and maths education.

Please email external-relations@maths.ox.ac.uk to register.

Watch live:

https://www.facebook.com/OxfordMathematics/
https://livestream.com/oxuni/Budd

The Oxford Mathematics Public Lectures are generously supported by XTX Markets.

  • Oxford Mathematics Public Lecture
15 January 2020
14:00
Yalong Cao

Further Information: 

In a joint work with Davesh Maulik and Yukinobu Toda, we proposed a conjectural Gopakumar-Vafa type formula for the generating series of stable pair invariants on Calabi-Yau 4-folds. In this talk, I will present the recent joint work with Yukinobu Toda on how to give an interpretation of the above GV type formula in terms of wall-crossing phenomena in the derived category of coherent sheaves. 

  • Algebraic Geometry Seminar

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