# Group Members

## Academic staff

**Tom Bridgeland**

Interests: Mirror Symmetry, Derived Categories, Moduli Spaces, Hall Algebras

Webpage, email: t.bridgeland@shef.ac.uk, room J18b

Bio: Tom learnt his trade in Edinburgh before moving to Sheffield in 2004. He spent the years 2011 and 2012 as a Research Fellow at All Souls College, Oxford.

**Andrea Brini**

email: a.brini@sheffield.ac.uk, room J21

Bio: Andrea got his PhD at SISSA, Trieste in 2009 and spent time as a postdoc in Geneva and then Imperial College in 2009-12. He obtained a CNRS permanent research post based at Montpellier in 2013, and held visiting research positions at Imperial College (2016-18) and MSRI Berkeley (2018), following which he took up a senior lectureship in Birmingham in 2018. He joined this group at Sheffield as a senior lecturer in 2019.

**Paul Johnson**

Interests: Gromov-Witten theory, Orbifolds, Hilbert schemes, Partitions

Webpage, email: paul.johnson@shef.ac.uk, room J06b

Bio: Paul initially completed his undergraduate at the University of Chicago. Following this he obtained his master’s at the University of Wisconsin-Madison and PhD at the University of Michigan under Yongbin Ruan. He then held various postdoctoral positions at Princeton, Imperial College London and Columbia University. He was associate professor at Colorado State University for one year before moving to the University of Sheffield.

**Cristina Manolache**

Interests: Moduli spaces, Gromov-Witten theory

email: c.manolache@sheffield.ac.uk, room J23

Bio: Cristina got her PhD at SISSA, Trieste and following this, she held postdoctoral positions at Humboldt Berlin and at Imperial College London. She came to the University of Sheffield as a senior lecturer in 2019.

**Evgeny Shinder**

Interests: Derived Categories of Coherent Sheaves, Grothendieck Group of Varieties

Webpage, email: e.shinder@sheffield.ac.uk, room J24

Bio: Evgeny defended his PhD at Northwestern University under Andrei Suslin. Afterwards he was a postdoc at the Max Planck Institute for Mathematics, University of Bonn, the Hausdorff Research Institute for Mathematics and the University of Mainz. In 2013-14 he was a Whittaker postdoc at the University of Edinburgh, before coming to Sheffield as a lecturer in 2014.

## Postdocs

**Kento Osuga**

Interests: Topological Recursion, Airy Structures, Supersymmetry, Gromov-Witten Invariants

email: k.osuga@sheffield.ac.uk, room K16

Bio: Kento completed his B.Sc at Shizuoka University in 2014 under Shogo Aoyama, and then moved to the University of Alberta for his Ph.D under Vincent Bouchard and Don N. Page. Afterwards, he was appointed as a temporal postdoctoral fellow at the same institution before moving to Sheffield.

**Sven Meinhardt**

Interests: Donaldson-Thomas Theory, Derived Algebraic Geometry, Mirror Symmetry, Mathematical Physics

Webpage, email: s.meinhardt@sheffield.ac.uk, room K24

Bio: Sven initially completed his diploma at the Humboldt University Berlin. He then moved to the University of Bonn for his PhD under Daniel Huybrechts as well as staying on as a postdoc. Following this he spent time at the Imperial College London and at the University of Oxford. It was here he came in contact with Donaldson-Thomas theory which is now his main research area. Afterwards he completed another postdoc at the University of Wuppertal before coming to Sheffield.

## PhD Students

**David Kern**

Supervisors: Etienne Mann (Angers), Cristina Manolache (Sheffield)

Interests: Derived algebraic geometry, Enumerative and homological mirror symmetry, Operads

email: kern@math.univ-angers.fr, room J25

Bio: David obtained his master’s degree in physics at the University of Strasbourg, then in mathematics in Paris, before starting his PhD in Angers and Sheffield.

**Giovanni Marchetti**

Supervisor: Tom Bridgeland

Interests: Enhancements and Invariants of Triangulated Categories, Categorification

email: GMarchetti1@shef.ac.uk, room K25

Bio: Giovanni obtained his undergraduate and master’s degree at La Sapienza, Rome before moving to Sheffield for his PhD.

**George Moulantzikos**

Supervisor: Evgeny Shinder

Interests: Derived Categories, Grothendieck Rings of Varieties, L-Equivalence, Hodge Theory, Torelli Problems

email: gmoulantzikos1@sheffield.ac.uk, room J25

Bio: George obtained his undergraduate and master’s degree at the University of Crete before moving to Sheffield for his PhD.

**Edward Pearce**

Supervisor: Paul Johnson

Interests: Algebraic Geometry, Commutative Algebra, Representation Theory, Combinatorics of Partitions

Webpage, email: empearce1@shef.ac.uk, room J14b

Bio: Edward completed an integrated master's degree at the University of Warwick and has since been studying for a PhD at the University of Sheffield.

**Eve Pound**

Supervisor: Paul Johnson

Interests: Hilbert schemes, Combinatorics of partitions, Representation theory of symmetric groups, Geometric group theory

email: epound1@sheffield.ac.uk, room J14a

Bio: Eve completed her undergraduate degree and Part III at the University of Cambridge. She is just starting as a PhD student in Sheffield.

**Karoline Van Gemst**

Supervisor: Andrea Brini

Interests: Frobenius Manifolds, Gromov-Witten theory, Quantum Cohomology, Landau-Ginzburg Theory, Mathematical physics

email: kvangemst1@sheffield.ac.uk, room J14b

Bio: Karoline obtained an MPhys Mathematical Physics from University of Edinburgh, and then an MSc in pure mathematics at Imperial College London. Afterwards, she moved to Birmingham for her PhD studies from where she transferred to Sheffield.

**Yirui Xiong**

Supervisor: Tom Bridgeland

Interests: Stability conditions and Calabi-Yau algebras

email: yiruimee@icloud.com, room J14a

Bio: Yirui completed his bachelor’s and master’s degree at Sichuan University in Chengdu, China. He just came to Sheffield as PhD student.

## Former Members

**Anna Barbieri**

Interests: Frobenius manifolds, Stability Conditions

Bio: Anna completed her undergraduate at University of Udine, Italy. She then undertook her PhD studies at the University of Pavia, Italy before moving to the University of Sheffield as a postdoc. She then moved on to another postdoc position at the University of Milan in May 2020.

**Nebojsa Pavic**

Interests: Derived Categories, K-Theory, Singularity Categories

Webpage, email: npavic1@shef.ac.uk, room J14b

Bio: Nebojsa completed his bachelor’s and master’s degree at the Swiss Federal Institute of Technology (ETH) in Zurich. Afterwards he moved to Sheffield to obtain a PhD under the supervision of Evgeny Shinder in May 2020. He then moved to the University of Hannover as a postdoc.

**Caitlin McAuley**

Interests: Stability Conditions, Mirror Symmetry

email: cmcauley1@shef.ac.uk

Bio: Caitlin obtained her undergraduate degree from the University of Glasgow and completed her master’s in Bonn before coming to Sheffield as a PhD student under the supervision of Tom Bridgeland.

**Barbara Bolognese**

Interests: Moduli Spaces of Sheaves on Surfaces, Tropical Geometry, Derived Categories

Webpage, email: bbolognese87@gmail.com

Bio: Barbara completed her undergraduate studies at the University of Rome, then she obtained her PhD at Northeastern University. She held postdoctoral positions at the Fields Institute, Toronto, and Sheffield until November 2019, after which she moved to Roma Tre University as a postdoc.

**Dylan Allegretti**

Interests: Cluster Varieties and Cluster Algebras, Quantum Teichmuller Theory, Mathematical Aspects of Quantum Field Theory and String Theory

Bio: After three years of postdoc at the University of Sheffield, Dylan moved to MSRI, Berkeley, for a postdoc, in August 2019.

**Rory Potter**

Interests: Derived Categories, Non-Commutative Geometry, Quotient Stacks, Derived McKay Correspondence and Stability Conditions

Bio: Rory studied his MMath degree at the University of Warwick before doing his PhD at the University of Sheffield under the supervision of Tom Bridgeland.

**Eoin Murphy**

Interests: Hall Algebras, Quiver Representations

Bio: Eoin came to the University of Sheffield for his PhD, under the supervision of Tom Bridgeland. He defended his thesis on December 2018.

**Joe Karmazyn**

email: j.h.karmazyn@gmail.com

Interests: Noncommutative Algebras, Derived Equivalences, Moduli Constructions to Study and Construct Examples in Algebraic Geometry

Bio: Joe studied his PhD in Edinburgh under the supervision of Michael Wemyss and Iain Gordon. He won a EPSRC post-doctoral fellowship, that he held at the University of Bath first and later at the University of Sheffield until June 2018.