Conferences

Talks, seminars, colloquia and mini-courses.

2027

• Modern representation theory and algebraic geometry, thematic program — ESI, Vienna (March 15-May 7)

2026

• Trends in Differential and Complex Geometry: a celebration of Nigel Hitchin’s 80th birthday — Clay Institute, Oxford (August 31 – September 4)
• Geometry conference in honour of Nigel Hitchin on the occasion of his 80th birthda — y, ICMAT, Madrid (September)
• SAGA Seminar — Orsay (May 26)
• i-Link Geometry workshop, ISTA (April 7-10)

2025

• Math+ Friday Colloquium — Berlin Mathematical School (Nov 21)
• Algebra Seminar — University of Sydney (Oct 24)
• Anatomy of big algebras — SMRI seminar, Sydney Mathematical Research Institute (Oct 16)
• Geometry, Representations and Duality — Bernoulli center, EPFL (Aug 18-22)
• Helvetic Algebraic Geometry Seminar — Les Diablerets (June 1-6)
• Hodge theory and algebraic geometry — zoom talk, SCGP (May 27-29)
• Stratifications of Higgs bundle moduli spaces and related topics — Santiago de Compostela (May 4-8)
• CERN/ISTA exchange visit, CERN Geneva (Mar 8)
• Groups, Arithmetic & Algebraic Geometry Seminar — at EPFL (Feb 20)
• Séminaire “Groupes de Lie et espaces de modules — Geneva (Feb 18)
• Bonn-Vienna block seminar: Equivariant cohomology, stable envelopes and big algebras — Bonn (Feb 8-11)

2024

• Institute Colloquium — Rényi Institute of Mathematics, Budapest (Dec 2)
• What is Life?” lecture — Trinity College, Dublin (Nov 5)
• Algebraic geometry research seminar — Big algebras, I-IV, University of Vienna (Oct-Nov)
• The P=W conjecture in non-Abelian Hodge theory — Clay Institute, Oxford (30 September- 4 October)
• Alpine Algebraic Geometry — Obergurgl (9-13 September)
• Moduli of Higgs bundles and Langlands program — Moduli conference, Simons Institute, Stony Brook (8-12 July)
• Conference on arithmetic geometry and applications — ICTP, Trieste (1-5 July)
• Center for mathematical physics — Mathematical physics colloquium, Hamburg (27 June)
• EPIGA — 2024 conference, IHP Paris (10-14 June)
• Arbeitsgemeinschaft: Geometry and Representation Theory around the P=W Conjecture — Oberwolfach (1-5 April)

2023

• Geometry Conference: 50 years of Nigel Hitchin’s Mathematics — Miami (talk on zoom) (December 11-16)
• Arbeitsgemeinschaft Diskrete Mathematik — Vienna (December 12)
• Algebra and Geometry seminar, University of Graz (October 25)
• Vector bundles and combinatorial algebraic geometry — Frankfurt (October 9-13)
• Mathematics- String theory seminar — IPMU, Tokyo (September 11-15)
• Geometry of moduli space of Higgs bundles — KIAS, Seoul (September 4-8)
• The Hitchin system, Langlands duality and mirror symmetry — ICMAT Madrid (April 24-28)
• Ngô Bào Châu’s seminar — Collège de France, Paris (April 14)
• Conference to honor Hiraku Nakajima for his 60th birthday — Kyoto university (talk on zoom) (February 20-24)
• Geometry and Analysis Seminar — Oxford (January 30)

2022

• Geometric representation theory and quantum topology — Paris (December 12-16)
• Proof of the P=W conjecture — ICTP Trieste (December 5-6)
• Emmy-Noether-seminar — Erlangen (December 2)
• Representation theory and automorphic forms seminar — University of Vienna (November 29)
• Conference in honour of Oscar Garcia-Prada on the occasion of his 60th birthday — ICMAT Madrid (September 12-16)
• Number theory and algebraic geometry, ICM sectional workshop — ETH Zürich (July 11-14)
• Helvetic Algebraic Geometry seminar — Les Diablerets (June 6-10)
• Ubiquity of systems of homogenous polynomial equations with a unique solution — U. Kansas (May 6)
• Ubiquity of systems of homogenous polynomial equations with a unique solution — Chapel Hill (April 7)
• Fixed point scheme as spectrum of equivariant cohomology and Kirillov algebras — UBC – ETH (February 28)

2021

• Hitchin map as spectrum of equivariant cohomology — CMSA Colloquium, Harvard (November 3)
• Hitchin map as spectrum of equivariant cohomology — Perimeter Institute (October 21)
• Explicit Hitchin system on Lagrangians — M-seminar, Kansas State (October 7)
• A conference in celebration of the 60th Birthday of Bill Crawley-Boevey — Manchester (September)
• International Congress on Mathematical Physics, Geneva (August)
• Geometry seminar ICMAT, Madrid (March 31)
• Representation Theory and Automorphic Forms — University of Vienna (March 9)
• Western Hemisphere Colloquium on Geometry and Physics (February 22)
• Cohomology of moduli spaces, SwissMAP Research Station in Les Diablerets (February)

2020

• Quiver varieties , character varieties and DT-invariants — IHP, Paris (February)

2019

• Conference on “Geometry, integrability and Moduli — Bonn (29 July- 2 August)
• Geometric and analytic aspects of moduli spaces — Hannover (22-26 July)
• Algebraic Analysis and Geometry with a view on Higgs bundles and D-modules, Porto (4-7 June)
• Geometry and Physics of Higgs Bundles — Oberwolfach (12-18 May)
• Conference on “Moduli in Budapest — Renyi Institute Budapest (6 April)
• Representation theory, gauge theory and integrable systems — Kavli IMPU, Tokyo (4-8 February)
• Dan Freed’s 60 birthday conference — Austin (14-18 January)
• Taipei Conference in Representation Theory VI — Taipei (7-11 January)

2018

• Harmonic maps and Higgs theory — Workshop, HSE, Moscow (22-27 October)
• CMI at 20 — Oxford (24-26 September)
• Motivic and p-adic integration — Geneva (21-22 September)
• Higgs bundles in mathematics and physics summer school — Hamburg (10-14 September)
• Geometric Correspondences of Gauge Theories — ESI Vienna (3-7 September)
• Summer School on Geometric Representation Theory — ISTA (9-13 July)
• Helvetic Algebraic Geometry Seminar — Konolfingen (4-7 June)

2017

• Higgs bundles, K3 surfaces and moduli — Berlin (10-12 July)
• Higgs bundles and related topics — Nice (29 May)
• Categorical approach to rationality — ESI, Vienna (5 May)
• Irregular connections, character varieties and physics — Paris VII (6-8 March)
• Workshop on Enumerative Geometry — IHP Paris (13-14 March)
• Hitchin system in mathematics and physics — Perimeter Institute, Waterloo (13-17 February)
• UT Austin (Jan 30 – February 10)

2016

• Algebraic Geometry and Integrable Systems — Kobe (5-9 Dec)
• Counting holes with Fourier transform — Matematisches Kolloquium, University of Vienna (5 October)
• Geometric representation theory and beyond — Clay Institute, Oxford (26-30 Sep)
• Celebrating 30 years of Higgs bundles and 15 years of generalized geometry — Hitchin 70:, ICMAT, Madrid (12-16 Sep)
• Hitchin 70 — Mathematical Institute, Oxford (9-11 Sep)
• Differential Geometry and Quantization — Hitchin 70:, QGM, Aarhus (5-8 Sep)
• Enumerative geometry of moduli spaces of sheaves in low dimension — CIB, Lausanne (Jan-Jun)

2015

• Moduli spaces in Geometry — CIRM, Luminy (October)
• Metric and analytic aspects of moduli spaces — Cambridge (July-August)
• AMS summer institute in Algebraic Geometry — Utah (July)
• Conference on Geometric Analysis in honor of the 65th birthday of Tudor Ratiu — CIB, Lausanne (June)
• Geometric unification from six dimensional physics — Banff (May)
• Counting holes with Fourier transform — IST, Austria (April 9)
• Algebraic Geometry and Differential Topology seminar — Renyi Institute, Budapest (April 8)

2014

• DAHA, Hall algebras, torus knots and combinatorics (19 November)
• The geometry, topology and physics of moduli spaces of Higgs bundles — Singapore (20 Jul- 8 Aug)
• RIP — in Oberwolfach (22 June-5 July)
• Seminar on Lie theory and moduli spaces — Geneva (3 June)
• Mirror symmetry, enumerative geometry and related topics — Pavia (28-30)
• Algebraic Geometry and Moduli Spaces seminar — ETH Zürich (23 May)
• Quantization of moduli spaces — Geneva (22-25 April)

2013

• Colloquium — Fribourg (20 Dec)
• Beyond toric integrability — CIB, Lausanne (13 Dec)
• Advanced seminar in algebraic geometry — Zürich (14 Oct)
• Number theory and physics — Clay Institute, Oxford (30 Sep-4 Oct)
• Forschungseminar Algebraische Geometrie, Essen (27 June)
• DT-invariants — Paris (17-21 June)
• Moduli spaces and their invariants in mathematical physics — CRM, Montreal (8-14 June)
• Refined invariants in geometry, topology and string theory — BIRS, Banff (2-7 June)
• Geometry and Physics — minicourse at, CRM, Montreal (30 May-1 June)
• Bonn – Cologne Number Theory and Physics Meeting — Bonn (14 May)
• Topology of moduli spaces and representations — Miraflores, Madrid (11-15 March)
• Inaugural lecture — EPFL (4 March)
• Winter School on the geometry of sheaves in low dimensions — Ascona (20-25 January)

2012

• Fields Medal Symposium in honour of Ngo Bao Chau — Fields Institute, Toronto (15-18 October)
• Geometry and topology of moduli — Humboldt University, Berlin (10-12- October)
• Representation Theory and Symplectic Algebraic Geometry — CIRM Luminy (7 – 13 July)
• De la géométrie algébrique aux formes automorphes: une conférence en l’honneur de Gérard Laumon — Orsay (25-29 June)
• Algebra and Geometry seminar — University of Rome “La Sapienza (30 May)
• Intégrales orbitales, fibration de Hitchin, et caractéres des groupes reductifs finis — University of Caen (21-23 May)
• Motivic Donaldson-Thomas invariants and singularity theory — Renyi Institute, Budapest (7-11 May)
• Betti numbers of large hyperkahler manifolds — Topology seminar, EPF Lausanne (15 May)
• Positivity of Kac polynomials and DT-invariants of quivers — Group theory seminar, EPF Lausanne (1 May)
• Representation theory and Geometry — FIM, ETH Zurich (10-14 April)
• Advances in hyperkahler and holomorphic symplectic geometry — BIRS, Banff (11-16 March)
• Fejes-Tóth Lecture — Arithmetic and physics in discrete algebraic geometry”, Centre for Computational Discrete Geometry, University of Calgary (9 March)
• Pure Mathematics/Mathematical Physics seminar, University of Cardiff (1 March)
• Center for Mathematical Physics — Colloquium at, Hamburg 2011 (12 January)

2011

• Algebraic Geometry / Moduli seminar — ETH, Zurich (9 Dec)
• Geometry and Analysis seminar — Symmetries of SL(n) Hitchin fibers, Oxford (17 Oct)
• Conference on principal G-bundles — ICMAT, Madrid (12-16 Sep)
• Nonperturbative Effects and Dualities in QFT and Integrable Systems — KITP, Santa Barbara4-7 July, Gauge theory and complex geometry, University of Leeds (18 July-5 Aug)
• VBAC2011 — closing conference of Moduli Spaces Newton Institute, Cambridge (27-30 June)
• Seminaire de geometrie algebrique — Arithmetic and physics of Higgs moduli spaces, Jussieu (9 June)
• Moduli Spaces and Moduli Stacks — Arithmetic and physics of Higgs moduli spaces, Columbia University (23-28 May)
• Equivariant Quantum Cohomology, Mirror Symmetry, and Symplectic Geometry — Simons Center, Stony Brook (18-20 May)
• London topology and geometry seminar — Arithmetic and physics of Higgs moduli spaces, Imperial College (25 March)
• Representations of Surface Groups and Higgs Bundles — Oxford; satellite workshop of Moduli Spaces Newton Institute, Cambridg (14-18 March)
• Representation theory of quivers and finite dimensional algebras — Quiver representations and cohomology of Hitchin fibers, Oberwolfach (20-26 February)

2010

• Simons lecture series — (3 lectures) Stony Brook (25-29 Oct)
• Geometry and Analysis seminar — From S-duality to the Fundamental Lemma, Oxford (18 Oct)
• Summer School on the Hitchin fibration — 4-5 lecture minicourse at, University of Bonn (26-30 July)
• NON-EUCLIDEAN GEOMETRY AND ITS APPLICATIONS — Cluj-Napoca (Kolozsvár) (5-9 July)
• Stony Brook — Simons lecture series (3 lectures), (cancelled due to flight restrictions – delivered by Simon Donaldson instead) (19 April – 23 April)
• The Interface of Integrability and Quantization — GQT colloquium at, Lorentz Center, Leiden (16 April)
• Arithmetic harmonic analysis on symplectic quotients, Colloquium, University of Amsterdam (14 April)
• Colloquium — Mirror symmetry, Langlands duality and the Hitchin system, Uttrecht (1 April)
• Geometry and Quantum Field theory cluster — visiting, University of Amsterdam (27 March – 17 April)
• CRM Barcelona — 5 lecture mini-course at school on Geometric Langlands and gauge theory (17-26 March)
• Algebra, Geometry and Integrable Systems Colloquium — Mirror symmetry, Langlands duality and the Hitchin system, Leeds (24 February)
• Mirror symmetry, Langlands duality and the Hitchin system, 5 lecture mini-course in Mathematical Institute, Oxford (Hilary Term)

2009

• Algebraic Geometry and Differential Topology seminar — Mirror symmetry, Langlands duality and the Hitchin system II, Renyi Institute, Budeapest (22 December)
• Mathematisches Kolloquium — Mirror symmetry, Langlands duality and the Hitchin system, University of Bonn (11 December)
• Chaudouard — Habilitation Jury for, Orsay (1 December)
• COW seminar — Mirror symmetry, Langlands duality and the Hitchin system, Cambridge (5 November)
• Algebra Seminar — Mirror symmetry, Langlands duality and the Hitchin system, Edinburgh (27 October)
• Geometry and Analysis Seminar — Mirror symmetry, Langlands duality and the Hitchin system, Oxford (12 October)
• Quiver varieties, Donaldson-Thomas invariants and instantons — 3 lecture mini-course at, CIRM Luminy (14-18 September)
• University of Montpellier — visiting (21 Aug – 13 September)
• Summer school on Geometry of Representations — 4 lecture mini-course at, Cologne (26 July-1 August)
• Mirror symmetry, symplectic geometry and related topics — workshop on, MIT (June 22-26)
• geometry seminar — University of Tokyo, : “Toric non-Abelian Hodge Theory (April 22-23)
• University of Kyoto (April 19-21)
• Seoul National University, seminar:”Mirror symmetry and Langlands duality” , colloquium: “Arithmetic harmonic analysis on holomorphic symplectic quotients (April 12-18)
• Topology of the Hitchin map and the arithmetic of the character variety”, SAGA Orsay (10 March)
• The Hitchin fibration” number theory study seminar, UCL, London (18 February)

2008

• Topology of the Hithin map and the arithmetic of the character variety”, Mathematical Physics seminar, Cambridge (Nov 4)
• Topology of the Hithin map and the arithmetic of the character variety” Geometry and Analysis seminar, Oxford (Oct 14)
• Topology of the Hithin map and the arithmetic of the character variety” Geometry Seminar, Edinburgh (Oct 10)
• Topology of the Hithin map and the arithmetic of the character variety”, Yorkshire-Durham geometry day, York (Oct 9)
• Arithmetic harmonic analysis on holomorphic symplectic quotients”, University of Geneva (Sep 23)
• Conference on Moment Maps — Centre de Recerca Matemática, Barcelona (June 25-28)
• Seminar Algebraic Geometry — MPI Bonn (June 19)
• Research in Pairs — with Letellier and Villegas, Oberwolfach (April 5-20)
• London Number Theory seminar (March 12)
• Conference on Mathematical Physics and Geometric Analysis — Fields Institute, Toronto (Jan 14-17)

2007

• Pure Mathematics Colloquium, University of Sheffield (Dec 5)
• Quaternionic structures in algebraic geometry — Toric Non-Abelian Hodge Theory”, University of Glasgow (Nov 15)
• Toric Non-Abelian Hodge Theory”, Geometry and Analysis Seminar, University of Oxford (Oct 15)
• Rényi Institute — Budapest, Hungary (June 10-Aug 10)
• THÉORIE DE LIE, GÉOMÉTRIE ET REPRÉSENTATIONS — Colloque International, Institut de Mathématiques de Jussieu, Paris, France (June 23)
• Geometry and TQFT — Aarhus, Denmark (June 18-22)
• Arithmetic harmonic analysis on character and quiver varieties — American Institute of Mathematics, Palo Alto, California (June 4-8)

2006

• Kac’s conjectures on quiver representations via arithmetic harmonic analysis, Algebraic Geometry seminar, Columbia University (Dec 1)
• Arithmetic of the Riemann-Hilbert monodromy map, Geometry seminar, University of Oxford (Oct 9)
• Kac’s conjectures on quiver representations via arithmetic harmonic analysis, Algebraic Geometry seminar, University of Oxford (Oct 3)
• Mixed Hodge polynomials of character varieties, Trinity College, Dublin (Sep 14)
• S-duality in hyperkähler Hodge theory — Madrid, Geometry Conference in honour of Nigel Hitchin (Sep 4-8)
• Rényi Institute — Kac’s conjectures on quiver representations via arithmetic harmonic analysis” (in Hungarian), Algebraic Geometry seminar, Budapest (Aug)
• Kac’s conjectures on quiver representations via arithmetic harmonic analysis”, GADGET seminar UT Austin (Jan)

2005

• Nagoya University (December 6)
• Hiraku Nakajima — Department of Mathematics, Kyoto University, visiting (November 28 -December 10)
• Geometry seminar — University of Edinburgh (November 24)
• Joint Algebra and Geometry and Topology seminar — University of Glasgow (November 23)
• Algebra seminar — University of Leeds (November 21)
• Representation theory seminar, University of Oxford (November 17)
• Cohomology of hyperkahler manifolds via arithmetic harmonic analysis — Topology and Geometry seminar, Imperial College, London (November 11)
• Geometry seminar — University of Cambridge (November 9)
• Workshop on the Topology of hyperkähler manifolds — Rényi Institute, Budapest (November 3-6)
• Hyperkähler geometry and moduli spaces” (in Hungarian), Algebraic Geometry and Differential Topology Seminar, Renyi Institute, Budapest (October 28)
• Geometry and analysis seminar — University of Oxford (October 24)
• Algébre Géométrie Algébrique Topologie Algébraique séminaire — University of Montpellier (October 20)
• l’Institut Fourier, Grenoble (October 17)
• Arithmetic harmonic analysis, Macdonald polynomials and the topology of the Riemann-Hilbert monodromy map — Seminaire Chevalley, Paris (October 13)
• Geometry and string theory seminar — The Hitchin map (T and Langlands duality)”, UT Austin (Sep 14)
• Geometry and string theory seminar — The Hitchin space (non-abelian Hodge theory)”, UT Austin (Sep 7)
• Summer Institute in Algebraic Geometry — Moduli of Sheaves and cohomological methods, University of Washington at Seattle (July 25-29)
• Aritmetikus harmonikus analizis es hyperkahler sokasagok kohomologiaja” (Arithmetic harmonic analysis and the cohomology of hyperkahler manifolds) Algebraic Geometry seminar, Renyi Institute, Budapest (June 10)
• Moment maps in various geometries — Banff International Research Station (May 21-25)
• Densest Packing of Spheres — Banff International Research Station (May 15-19)
• Calgary workshop in Discrete geometry — Quaternionic geometry of matroids (May 13-14)
• Symplectic Geometry Seminar — University of Toronto (May 10-11)
• Differential Geometry seminar — Topology of the Riemann-Hilbert monodromy map via arithmetic haRmonic analysis “, ; University of Illinois, Urbana-Champaign (April 21)
• Mirror symmetry and Langlands duality in the mixed Hodge structure of charaCter varieties of Riemann surfaces — Special Session on Geometry and Physics, AMS sectional meeting, Santa Barbara (April 17)
• GADGET seminar — Topology of the Riemann-Hilbert monodromy map via arithematic harmonic analysis”, UT Austin (February 22)

2004

• Cohomology of hyperkahler quotients — Moment Maps and Surjectivity in Various Geometries, American Institute of Mathematics, Palo Alto (August 9-13)
• Geometry seminar, UT Austin: “On a conjecture on the mixed Hodge polynomial of the GL(n,C)-character variety of a Riemann surface (April 15)
• Quaternionic geometry of everything — Colloquium at Rice University, Houston: “, “. (April 8)
• L^2 harmonic forms in geometry and string theory — American Institute of Mathematics, Palo Alto (March 17-21)

2003

• Geometric Methods in Algebra and Number Theory — University of Miami: “Mirror symmetry, Langlands duality and representations of finite groups of Lie type (December 19)
• 2003 Geometry Seminar, UT Austin: Integrals on the moduli of Higgs bundles (September 18)
• Texas Geometry and Topology Conference — Houston, Mirror symmetry, Langlands duality and representations of finite groups of Lie type (Feb. 21-23)
• Number theory seminar, UT Austin: Mirror symmetry, Langlands duality and representations of finite groups of Lie type (Feb 11)

2002

• GADGET Seminar — 12 30, UT Austin: Introduction to problems in quaternionic geometry III. Problems in quaternionic geometry (Oct 8)
• GADGET Seminar — 12 30, UT Austin: Introduction to problems in quaternionic geometry II. Introduction to hyperkähler (quaternionic, N=4 supersymmetric) geometry (Oct 1)
• GADGET Seminar — 12 30, UT Austin: Introduction to problems in quaternionic geometry I. The Kähler package (Sep 24)
• Miller Institute for Basic Reaserch in Science — : Problem solving by geometrization and algebraization: Present day implementation of Descartes’s program (April 9)
• Non-Abelian Hodge Theory, Part I: Higgs bundles and applications — MSRI, Berkeley, workshop: Intersection theory on the moduli space of Higgs bundles (Mar 29)
• Intersection Theory on Stacks — 2-3pm, MSRI, Berkeley, workshop: Intersection theory on toric hyperkahler varieties (Mar 13)
• Compactifications — Berkeley, seminar: Why compactify? (Feb 8)

2001

• Matroidok Kvaternió Geometriája — 16.00 Budapesti Mûszaki Egyetem (Technical University of Budapest), H. 306:, (Quaternionic Geometry of Matroids) (Dec 17)
• 10.15 Rényi Institute, Budapest: Tükör szimmetria, Langlands dualitás és Hitchin rendszerek, (Mirror symmetry, Langlands duality and Hitchin systems) (Dec 14)
• Math-Physics joint seminar — Upenn, : Mirror symmetry, Langlands duality and Hitchin systems (Nov 27)
• Algebraic methods — Stanford, seminar: Quaternionic geometry of matroids (Nov 19)
• 2001 Fall Western Section Meeting Irvine, CA — Extremal Metrics and Moduli Spaces: Mirror symmetry, Langlands duality and Hitchin systems (Nov 10-11)
• Combinatorics seminar — Berkeley, titled: Quaternionic geometry of matroids (Oct 15)
• Austin Geometry seminar titled: Quaternionic geometry and dualities in mathematics and physics (Oct 4)
• Seminars on hyperKähler manifolds , Kyoto University: Yang-Mills instantons on Taub-NUT space (Sep 11)
• Seminars on hyperKähler manifolds, Kyoto University: Cohomology rings of quiver varieties (Sep 10)
• Geometry of Moduli spaces and Integrable Systems”, Workshop in RIMS, Kyoto University, Japan — : Mirror symmetry, Langlands duality and Hitchin systems (Sep 6)
• Workshop on New Interfaces between Geometry and Physics, Miraflores de la Sierra, Madrid (Spain) — : Cohomology ring of Nakajima’s quiver varieties (June 1)
• L^2 cohomology and Schwarzschild instantons — joint Berkeley Differential Geometry and String Theory seminar: (April 20)
• Mirror symmetry, Langlands duality and Hitchin systems — Stanford Topology seminar titled (April 10)
• Cohomology ring of hyperkaehler quotients — Northern California Symplectic Geometry seminar: (April 2)
• Mirror symmetry, Langlands duality and Hitchin systems — Berkeley Infinite dimensional algebras seminar: (March 21)
• Combinatorics seminar — Berkeley, : Combinatorics via topology of moduli spaces . (March 19)