Seminars

We run a weekly Algebraic Geometry and Mathematical Physics Seminar - details below.

On Wednesday at 2pm there is the Pure maths Colloquium, and on Monday at 3pm we organise a learning seminar on K3 surfaces (calendar, notes, Huybrechts's book).
Talks are usually in room J11.

In November 2019, 13th-14th, we host a two-days GLEN workshop.

For a complete list of seminars hosted at the School of Maths and Stats, look at This week’s seminars and This semester’s seminars.

Seminars 2019/20

Francesco Sala (IPMU Tokyo)
Categorification of 2d cohomological Hall algebras

Tuesday 17th Sep, 14:00, J11

Abstract: Let M denote the moduli stack of either coherent sheaves on a smooth projective surface or Higgs sheaves on a smooth projective... Read more

Paul Johnson (Sheffield)
Partitions and Hilbert schemes of points

Tuesday 1st Oct, 12:00, J11

Abstract: This will be a gentle, expository talk explaining some connections between the two objects in the title. I will begin with... Read more

Dhruv Ranganathan (Cambridge)
A Mayer-Vietoris theorem for Gromov-Witten theory

Tuesday 8th Oct, 12:00, J11

Abstract: The Gromov-Witten theory of a smooth variety X is a collection of invariants, extracted from the topology of the space of ... Read more

Jenny August (MPIM Bonn)
The Stability Manifold of a Contraction Algebra

Tuesday 15th Oct, 12:00, J11

Abstract: For a finite dimensional algebra, Bridgeland stability conditions can be viewed as a continuous generalisation of tilting theory, providing... Read more

Pierrick Bousseau (ETH)
Quasimodular forms from Betti numbers

Thursday 17th Oct, 15:00, J11 (note unusual day)

Abstract: I will explain how to construct quasimodular forms starting from Betti numbers of moduli spaces of dimension 1 coherent sheaves on P2. This gives a proof of some stringy predictions about the refined topological string theory of local P2 in the Nekrasov-Shatashvili limit. Partly based on work in progress with Honglu Fan, Shuai Guo, and Longting Wu.

Nick Sheridan (Edinburgh)
The Gamma and SYZ conjectures: a tropical approach to periods

Tuesday 22nd Oct, 12:00, J11

Abstract: I'll start by explaining a new method of computing asymptotics of period integrals using tropical geometry, via some... Read more

Noah Arbesfeld (Imperial College London)
K-theoretic Donaldson-Thomas theory and the Hilbert scheme of points on a surface

Tuesday 29th Oct, 12:00, J11

Abstract: Tautological bundles on Hilbert schemes of points often enter into enumerative and physical computations. I'll explain how to use the Donaldson-Thomas theory of ... Read more

Ben Davison (Edinburgh)
Strong positivity for quantum cluster algebras

Tuesday 5th Nov, 12:00, J11

Abstract: I will discuss the positivity for quantum theta functions, a result of joint work with Travis Mandel. For... Read more

Soheyla Feyzbakhsh (Imperial College London)
Stability conditions on the derived category of coherent systems and Brill-Noether theory

Thursday 21st Nov, 12:00, J11 (note unusual day)

Abstract: A classical method to study Brill-Noether locus of higher rank semistable vector bundles on curves is to examine the stability of coherent systems. To have an abelian category we enlarge the... Read more

Dimitri Wyss (École Polytechnique Fédérale de Lausanne)
Non-archimedean and motivic integrals on the Hitchin fibration

Tuesday 3rd Dec, 12:00, J11

Abstract: Based on mirror symmetry considerations, Hausel and Thaddeus conjectured an equality between ‘stringy’ Hodge numbers for... Read more

Sira Gratz (Glasgow)
Higher SL(k)-friezes

Tuesday 10th Dec, 12:00, J11

Abstract: Classical frieze patterns are combinatorial structures which relate back to Gauss’ Pentagramma Mirificum, and have been extensively studied by Conway and Coxeter in the 1970’s.... Read more

Adeel Khan (Regensburg)
Intersection theory of derived stacks

Wednesday 11th Dec, 15:00, LT-B (NOTE unusual date and time)

Abstract: I will discuss how various formalisms of intersection theory (Chow groups, K-theory, cobordism) can be extended to the setting of derived schemes and stacks. This gives a new approach to virtual phenomena such as the virtual fundamental class and virtual Riemann-Roch formulas.

Alexandr Buryak (Leeds)

Wednesday 18th Dec, 14:00, J11 (NOTE unusual date and time)

Previous Seminars

Algebraic Geometry Seminars: 2017/18, 2016/17, 2014-16
GLEN meetings at Sheffield: 2018, 2016
Learning seminars:

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