Tue, 06 May 2025
15:30
L4

Fukaya categories at singular values of the moment map

Ed Segal
(University College London)
Abstract

Given a Hamiltonian circle action on a symplectic manifold, Fukaya and Teleman tell us that we can relate the equivariant Fukaya category to the Fukaya category of a symplectic reduction.  Yanki Lekili and I have some conjectures that extend this story - in certain special examples - to singular values of the moment map. I'll also explain the mirror symmetry picture that we use to support our conjectures, and how we interpret our claims in Teleman's framework of `topological group actions' on categories.



 

Mon, 12 May 2025
14:15
L5

Tight contact structures and twisted geodesics

Michael Schmalian
(Mathematical Institute (University of Oxford))
Abstract

Contact topology and hyperbolic geometry are two well-established, yet so far largely unrelated subfields of 3-manifold topology. We will discuss a recent result relating phenomena in these two fields. Specifically, we will demonstrate that tightness of certain contact structures on hyperbolic manifolds is detected by the behaviour of geodesics in the underlying hyperbolic geometry. A key geometric tool we will discuss is the deformation theory for hyperbolic manifolds. 

Tue, 13 May 2025
14:00
L6

TBC

Arun Soor
(University of Oxford)
Abstract

to follow

Our next Public Lecture (see item above) stars  Gábor Domokos, discoverer of the Gömböc. So, as a taster, here is Sam Howison explaining what exactly Gábor was up to.

Thu, 22 May 2025
16:00
C3

TBC

Michael Magee
(University of Durham)
Abstract

to follow

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