Polynomial bounds for chromatic number VII. Disjoint holes
Chudnovsky, M
Scott, A
Seymour, P
Spirkl, S
Journal of Graph Theory
volume 104
issue 3
499-515
(14 May 2023)
A fast randomized algorithm for computing an approximate null space
Park, T
Nakatsukasa, Y
BIT Numerical Mathematics
volume 63
Symmetry underpins all physics research. We look for fundamental and beautiful patterns to describe and explain the laws of nature. One way of explaining symmetry is to ask: "what is the full set of operations I can do to my real-world experiment or abstract theory written on paper that doesn't change any physical measurements or predictions?'' There are simple symmetries we are perhaps already familiar with. For example, lab-based physics experiments usually don't care if you wait an hour to do the experiment or if you rotate your apparatus by 90 degrees.
Tue, 16 May 2023
11:00 -
12:00
L3
DLA and related models, part II
Dmitry Belyaev
Abstract
This will be a continuation of the talk from last week (9 May).
We are delighted to announce our first Maryam Mirzakhani Scholar. Marta Bucca (pictured) will join Oxford Mathematics in October as a postgraduate student in the Mathematical Physics Group, to carry out research on String Theory under the supervision of Professor Mark Mezei.
Wed, 31 May 2023
17:00
17:00
Lecture Theatre 1, Mathematical Institute, Radcliffe Observatory Quarter, Woodstock Road, OX2 6GG
A world from a sheet of paper - Tadashi Tokieda
Tadashi Tokieda
(Stanford University)
Further Information
Starting from just a sheet of paper, by folding, stacking, crumpling, sometimes tearing, Tadashi will explore a diversity of phenomena, from magic tricks and geometry through elasticity and the traditional Japanese art of origami to medical devices and an ‘h-principle’. Much of the show consists of table-top demonstrations, which you can try later with friends and family.
So, take a sheet of paper. . .
Tadashi Tokieda is a professor of mathematics at Stanford. He grew up as a painter in Japan, became a classical philologist (not to be confused with philosopher) in France and, having earned a PhD in pure mathematics from Princeton, has been an applied mathematician in England and the US; all in all, he has lived in eight countries so far. Tadashi is very active in mathematical outreach, notably with the African Institute for Mathematical Sciences. You'll find him on Numberphile's YouTube channel.
Please email @email to register.
The Oxford Mathematics Public Lectures are generously supported by XTX Markets.
Variation in the trophic morphology of astigmatid mites common in UK beehives
Bowman, C
Acarologia
volume 63
issue Suppl
4-16
(06 Jul 2023)
Sequential path signature networks for personalised longitudinal language modeling
Tseriotou, T
Tsakalidis, A
Foster, P
Lyons, T
Liakata, M
Findings of the Association for Computational Linguistics: ACL 2023
5016-5031
(05 Aug 2023)
Mon, 15 May 2023
15:30
15:30
L5
Virtual classes of character stacks
Marton Hablicsek
Abstract
Questions about the geometry of G-representation varieties on a manifold M have attracted many researchers as the theory combines the algebraic geometry of G, the topology of M, and the group theory and representation theory of G and the fundamental group of M. In this talk, I will explain how to construct a Topological Quantum Field Theory to compute virtual classes of character stacks (G-representation varieties equipped with the adjoint G-action) in the Grothendieck ring of stacks. I will also show a few features of the construction (for instance, how to obtain arithmetic information) focusing on a couple of simple examples.
The work is joint with Jesse Vogel and Ángel González-Prieto.