Seminars in Pure Mathematics

Pure Mathematics Seminars are usually held at 2:00pm on Tuesdays in room 119 of the Michael Atiyah building, preceded by lunch at 12:30 in the Charles Wilson building, and followed by tea and biscuits in College House (first floor landing). All are welcome to these seminars. For any questions or comments please contact Andy Tonks at

2016-2017 Leicester Pure Mathematics Seminar (Semester 1)

04/10/2016 Giuseppe Tinaglia (King's College, London) The geometry of constant mean curvature surfaces in Euclidean space

Abstract: In this talk I will begin by reviewing classical geometric properties of constant mean curvature surfaces, H>0, in R^3. I will then talk about several more recent results for surfaces embedded in R^3 with constant mean curvature, such as curvature and radius estimates for simply-connected surfaces embedded in R^3 with constant mean curvature. Finally I will show applications of such estimates including a characterisation of the round sphere as the only simply-connected surface embedded in R^3 with constant mean curvature and area estimates for compact surfaces embedded in a flat torus with constant mean curvature and finite genus. This is joint work with Meeks.

11/10/2016 Artie Prendergast-Smith (Loughborough) Cones of positive classes

Abstract: I will explain why convex cones of "positive" cohomology classes arise naturally in algebraic geometry, why they are important, and some things we know about them.

18/10/2016 Simon Willerton (Sheffield) The magnitude of odd balls (From category theory to potential theory)

Abstract: Tom Leinster defined the notion of the magnitude of a finite metric space, which is some notion of size, using his idea of Euler characteristic of a finite category. You can extend this notion to nice infinite metric spaces such as subsets of Euclidean space. Tom and I conjectured a formula for the magnitude of a convex body involving classical invariants such as volume and surface area, but it turned out to be difficult to calculate precisely for non-trivial bodies. I will explain all of this and how Tony Carbery and Juan-Antonio Barceló recently used potential theory to calculate the magnitude of odd dimensional balls.

Thursday 20/10/2016 Extra seminar: Neil Ghani (Strathclyde) Compositional Game Theory

Abstract: The central concept of economic game theory is that of Nash Equilibria consisting of a collection of strategies for each player in a game such that no player has a reason to change their strategy assuming all players keep their strategies the same. This talk reports on a new categorical foundation for economic game theory - compositional game theory (CGT). At its core, CGT involves a new representation of games where large games are built from smaller subcomponents of the game. However, while natural from a categorical perspective, developing CGT is no simple matter, eg all current models of game theory are inherently non-compositional! More fundamentally, not all reasoning can be put in the compositional form, especially if there is significant emergent behaviour present in a system which is not present in its subsystems. And, this is certainly the norm in game theory, eg an optimal strategy for a game may not remain optimal when that game is part of a larger network of games.

2015-2016 Leicester Pure Mathematics Seminar (Semester 2)

26/01/2016 Alison Parker (Leeds) Some central idempotents for the Brauer Algebra (abstract)

09/02/2016 Sian Fryer (Leeds) There And Back Again: A Localization's Tale (abstract)

16/02/2016 Radha Kessar (City) Ratonality properties for blocks of finite groups (abstract)

23/02/2016 Michael Whittaker (Glasgow) New directions in self-similar group theory (abstract)

01/03/2016 Alexander Kasprzyk (Nottingham ) Mirror Symmetry for del Pezzo surfaces (abstract)

08/03/2016 Stefan Kolb (Newcastle) Universal K-matrix for coideal subalgebras (abstract)

Thursday 24/03/2016 at 11am Mark Weber (Macquarie) Vines and internal algebras (abstract)

Wednesday 20/04/2016 at 1:30pm Ilke Canakci (Durham) Snake graphs, cluster algebras and continued fractions (abstract)

26/04/2016 Jing Ping Wang (Kent) Symbolic representation and classification of integrable equations (abstract)

03/05/2016 Dmitri Gourevich (Valenciennes) Quantum matrix algebras and braided Yangians (abstract)

10/05/2016 Martin Kalck (Edinburgh) Matrix factorisations: Knörrer’s periodicity and beyond (abstract)




2015-2016 Leicester Pure Mathematics Seminar (Semester 1)

25/08/2015 Maria Ronco (Universidad de Talca)  A regular operad on Dyck paths (abstract)

22/09/2015 Christine Vespa (Université de Strasbourg) Stable homology of automorphism groups of free groups and functor homology (abstract)

29/09/2015 (Double Seminar!)
2pm: Martina Balagovic (Newcastle University) Universal K-matrices via quantum symmetric pairs (abstract) (slides)

3pm: James Waldron (Newcastle University) Lie algebroids and differentiable stacks (abstract)

06/10/2015 James Griffin (Coventry University) The space of circles (abstract) (slides)

13/10/2015 Szymon Dolecki (Université de Bourgogne) Convergence, compactness, completeness (abstract)

20/10/2015 André Neves (Imperial College London) Morse index and Geometry (abstract)

27/10/2015 Ana Rovi (Newcastle University) Lie algebroids in the Loday-Pirashvili category (abstract)

03/11/2015 TBA () TBA (abstract)

10/11/2015 Petter Bergh (NTNU, Trondheim) n-angulated categories (abstract)

17/11/2015 Sira Gratz (Leibniz Universität Hannover) Torsion pairs in discrete cluster categories of Dynkin type A (abstract)

24/11/2015 Sinead Lyle (University of East Anglia) Semigroup algebras and standard bases (abstract)

01/12/2015 TBA () (abstract)

08/12/2015 Ian McIntosh (University of York) Minimal surfaces and their Higgs bundles (abstract)



Previous Seminars

2014-15 Leicester Pure Mathematics Seminar – Semester 2

03/02/2015 Peter Topping (University of Warwick)  The harmonic map flow revisited  abstract

10/02/2015 Constanze Roitzheim (University of Kent) Model categories- the joy of abstract nonsense abstract

17/02/2015 Joanne Leader (University of Leicester)  Finite Generation of Ext and (D, A)-stacked Algebras abstract

24/02/2015 Jan Boronski (IT4 Innovations, Ostrava) On Birkhoff Attractors and Rotational Chaos abstract

03/03/2015 Manolis Georgoulis (University of Leicester)  Adaptive numerical methods for the approximation of dynamic singularities abstract

10/03/2015 Jamie Vicary (University of Oxford) Higher categories and quantum computation abstract

17/03/2015 Michael Singer (University College London)  A new approach to monopole metrics abstract

24/03/2015 Imma Galvez (Universitat Politecnica de Catalunya)

Incidence (co)algebras and decomposition spaces abstract

5/05/2015 Francisco Martin (University of Granada) abstract

Translating solitons of the mean curvature flow

12/05/2015 Nicola Gambino (University of Leeds)  abstract

Commutative 2-algebra and analytic functors

2014-15 Leicester Pure Mathematics Seminar – Semester 1

28/08/2014 Julie Bergner (Univ. of California at Riverside), Homotopical higher categories (Abstract)

30/09/2014 Henri Anciaux (Univ. of San Paulo) Marginally trapped submanifolds (Abstract)

7/10/2014 Gavin Brown (Loughborough University), Pfaffian ideals and Calabi-Yau 3-folds  (Abstract)

14/10/2014 Andrey Lazarev (Lancaster University) Koszul-Morita duality (Abstract)

21/10/2014 Stephane Launois (Univ. of Kent) Efficient recognition of totally nonnegative cells (Abstract)

28/10/2014 Samuel Petite (Univ. de Picardie) Simplicity of the homeomorphism group of a tilable  lamination (Abstract)

4/11/2014 Magdalena Rodriguez (Univ. of Granada) Minimal surfaces with finite total curvature and related problems (Abstract)

11/11/2014 Mike Prest (Univ. of Manchester) Ziegler spectra of domestic string algebras (Abstract)

18/11/2014 Pavel Tumarkin (Durham Univ.) Coxeter groups, cluster algebras, and geometric manifolds (Abstract)

25/11/2014 Ivan Tyukin (University of Leicester) Lyapunov method for unstable attractors (Abstract)

2/12/2014 13:30-14:30  Rosie Laking (University of Manchester)

Morphisms in Kb(proj ˄) for  ˄ a gentle algebra. (Abstract)

15:00-16:00 Joeri Van der Veken (University of Leuven)

Sequences of harmonic maps in the 3-sphere (Abstract)

9/12/2014 Jamie Walton (Univ. of York)

Patch frequencies for cut-and-project sets  and Diophantine approximation (Abstract)


2013-14 Leicester Pure Mathematics Seminar – Semester 2

28/01/2014 Ines Henriques (Sheffield), F-thresholds and Test ideals for determinantal ideals of maximal minors (Abstract)

04/02/2014 Ralf Schiffler (Conneticut), Positivity in Cluster Algebras (Abstract)

11/02/2014 Bruce Bartlett (Oxford), Bordism representation theory in dimension 3 (Abstract)

18/02/2014 Jean Fasel (Muenchen), Homotopy groups of algebraic spheres and classification of vector bundles (Abstract)

25/02/2014 David Pauksztello (Manchester), An introduction to discrete derived categories (Abstracts)

04/03/2014 Ben Sharp (Imperial), Global estimates for harmonic maps form surfaces (Abstract)


  • 1:30 pm Ian McIntosh (York), Minimal surfaces and complex quasi-Fuchsian groups (Abstract)
  • 3 pm Osbaldo Mata Gutierrez (CIMAT, Guanajuato),Subvarieties of the moduli space of vector bundles on a curve (Abstract)


18/03/2014 Karin Erdmann (Oxford), On the generalized Auslander-Reiten condition (Abstract)

25/03/2014 Anthony Manning (Warwick) A map of the tetrahedron that describes the sequence of pedal triangles (Abstract)

06/05/2014 Michael Farber (Warwick), Large Random Spaces and Groups.

2013-14 Leicester Pure Mathematics Seminar – Semester 1

1/10/2013 Anna Felikson (Durham) Cluster algebras of finite mutation type (Abstract)

08/10/2013 Jan Grabowski (Lancaster) Gradings on cluster algebras and associated combinatorics (Abstract)

15/10/2013 Joseph Grant (Leeds) Braid group actions and a theorem of Rouquier and Zimmermann (Abstract)

22/10/2013 Behrang Noohi (Queen Mary) String operations for orbifolds (Abstract)

29/10/2013 Ilke Canakci (Leicester) Surface cluster algebra combinatorics via snake graphs(Abstract)

5/11/2013 Lynn Heller (Tuebingen) Constrained Willmore Hopf Tori (Abstract)

12/11/2013 Toby Hall (Liverpool) Digit frequencies for expansions in non-integer bases.(Abstract)

19/11/2013 Mark Grant (Newcastle) Lower bounds for the topological complexity of groups(Abstract)

26/11/2013 Alan Robinson (Warwick) Products and homotopy (Abstract)

3/12/2013 Tom Sutherland (Sheffield) Mutation and quadratic differentials (Abstract)

10/12/2013 Francis Burstall (Bath), Geometry and dynamics of isothermic submanifolds(Abstract)

Seminars 2012-2013

Seminars 2011-2012

Seminars 2010-2011

Seminars 2009-2010

Seminars 2008-2009

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Department of Mathematics
University of Leicester
University Road
Leicester LE1 7RH
United Kingdom

Tel.: +44 (0)116 252 3917
Fax: +44 (0)116 252 3915

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