Old Visits
2016,
2015,
2014,
2013,
2012,
2011,
2010,
2009,
2008,
2007,
2006,
2005,
2004,
2003,
2002,
2001,
2000,
1999,
1998,
1997
2016
Sep. 12  16, Workshop on Geometric Correspondence in Gauge theory, Trieste
 Aug. 31  Sep.3, The 49th Symposium on Ring Theory and Representation Theory, Osaka Prefecture University
 Introduction to quiver varieties, 1st, 2nd
 July 24  Aug. 5, Aspen
 June 27  July 2, String Math 2016, Paris
 Quantized Coulomb branches of 3d N=4 gauge theories and difference operators
 April 11  July 15, IHP StringMath trimester 2016, Institut Henri Poincar«±, Paris
 I am planning to visit during June 20  26.
 May 24  27, Wallcrossing and quiver varieties, EPFL, Lausanne
 May 6, Representation Theory Seminar, Kyoto
 Cherkis bow varieties and Coulomb branches of quiver gauge theories of affine type A
 March 21  25, Algebraic Lie Theory and Symplectic Geometry,
Tsinghua Sanya International Mathematics Forum
 Feb. 23, KTGU Mathematics Workshop for Young Researchers, Coulomb branches of gauge theories
2015
 Dec. 7  11, Shanghai Conference on Representation Theory, Chongming island near Shanghai
 Nov. 9  13, The workshop on 6D gauged theory
and invariants of 4manifolds, Beijing International Center for Mathematical Research (Only on Nov. 12, 13)
 Oct. 25  Nov. 4, HSE, Moscow
 Sep. 14  18, Moduli spaces in algebraic geometry and mathematical physics, Chern Institute of Mathematics in Tianjin, China
 Coulomb branches and refined DT invariants
 Aug. 31  Sep.4, Workshop on Derived structures in geometry and representation theory, Oxford, UK
 Coulomb branches and DT invariants
 July
2026  Aug. 148, Metric and analytic aspects of moduli spaces, Newton Institute, Cambridge, UK
 Coulomb branches of 3dimensional N=4 gauge theories, Video
July 20  24, AMS Summer Institute in Algebraic Geometry
June 28July 6  July 18, Park City Math Institute, Graduate Summer Program
June 1  5, Workshop on Nonabelian Gauged Linear Sigma Mode and Geometric Representation Theory, Beijing International Center of Mathematical Science
 May 24  29, Geometric Unification from SixDimensional Physics, BIRS
 Towards a mathematical definition of Coulomb branches of 3dimensional N=4 gauge theories, Video
 May 18  21, Geometry and representation theory of symplectic resolutions, Boston
 Towards a mathematical definition of Coulomb branches of 3dimensional gauge theories (continued)
 May 4  8, Categorification in Algebra, Geometry and Physics (in honor of the 60th
Birthday of Christian Blanchet), Corsica, workshop website
 March 24  28, Lausanne
 March 13, Paris, Towards a mathematical definition of Coulomb branches of 3dimensional N=4 gauge theories
 March 8  April 4, Institute MittagLeffler,
Representation Theory
 Jan. 19  23, Winter School on Representation Theory, Geometric Representation Theory, Kyoto (Organizer)
2014
 Dec. 14  24, Moscow
 Dec. 17, Coulomb branches of 3d N=4 gauge theories and the affine Grassmannian, Part I
 Dec. 22, Part II
 Abstract
 Nov. 17  21, Categorical Structures in Harmonic Analysis, MSRI
 Nov. 12, The 2014 Kyoto Prize Workshop in Basic Sciences
 3dimensional gauge theory and representation theory, pdf
 Oct. 20  Nov. 8, SCGP
 Sep. 29  Oct. 1, Lectures at University of Tokyo
 Title : Instanton moduli spaces and Walgebras
 Detail
 Sep. 15  19, McKay correspondence, Orbifolds, Quivers, Warwick
 Sep. 8  12, Introduction to Derived Categories, Warwick
 Aug.6  9, ICM satellite conference, Representation Theory and Related Topics, Daegu, Korea
 July 21  Aug. 1, Geometric Representation Theory, Kyoto (Organizer)
 June 16  20, Workshop on Instanton Counting: Moduli Spaces, Representation Theory and Integrable Systems, Lorentz Center, Leiden
 Feb. 21  22, Geometry, Physics and Representation Theory, Nagoya
 Jan. 19  25, KIAS
 Jan. 11, Exact Results on SUSY Gauge Theories and Integrable
Systems, Rikyo Univ.
2013
 Dec. 13  19, Representation Theory and applications to Combinatorics, Geometry and Quantum Physics, Feigin 60 Moscow
 Dec. 2  6, ChernSimons reserach lectures, UC Berkeley
 Oct. 21, KazhdanLusztig conjecture via quasimaps and Uhlenbeck spaces,
Informal Mathematical Physics Seminar, Columbia University, pdf
 Oct., Quiver varieties, Simons Center for Geometry and Physics, Stony Brook
 Sep. Oct., Cohomology in Mathematics and Physics, Euler International Mathematical Institute, St. Petersburg
 Sep. 9  13, School and Workshop on geometric correspondences of gauge theories, ICTP, Trieste
 Aug. 7  8, Representation Theory and Algebraic Structures, Seoul
 Gauge theory and Representation Theory
 July 30  Aug. 2, 2013 RIMS SYMPOSIUM "String Theory, Integrable Systems and Representation theory",
RIMS
 title: Integral forms of Walgebras
 abstract: During the study of the AGT conjecture, I am lead to introduce an integral form of the Walgebra, defined over
$\mathbb Q[\varepsilon_1, \varepsilon_2]$, where $k+h^\vee = \varepsilon_2/\varepsilon_1$.
The definition does not involve the AGT, and is based on the BRST cohomological definition of the Walgebra.
I will explain the construction, and the specialization at $\varepsilon_1=0$.
 June 24  28, Representation Theory and Categorification, at PRIMA2013 conference, Shanghai
 Cluster algebras and singular supports of perverse sheaves
 June 11(Tue)  21(Fri), Development of moduli theory, MSJSI, RIMS
 June 3  14, Moduli spaces and their invariants in mathematical physics, Montreal
 Apr.8  12, Interactions between Noncommutative Algebra, Representation Theory, and Algebraic Geometry, MSRI
 Mar. 3  9, Infinite Analysis 13, RIMS, Japan
2012
 Dec. 10, IPMU DMM seminar, AGT conjecture
 Oct. 7  Nov. 3, Simons center for Geometry and Physics, Stony Brook
 Oct. 11, Integrability Seminar, tanalog of qcharacters of Yangians and Betti numbers of graded quiver varieties
 Oct. 18, cont'd
 Oct. 23, SCGP Weekly Talk, AGT conjecture, pdf for resume
 Oct. 25, Topology Seminar, Refined ChernSimons theory and Hilbert schemes of points on the plane
 Oct. 15, Columbia University, Informal Mathematical Physics Seminar,
Refined ChernSimons theory and Hilbert schemes of points on the plane
 Sep. 24  28, Workshop, Kyoto, organized by Syu Kato
 Quiver varieties and tensor products
 Aug. 13  17, ICRA 2012, Bielefeld
 Monoidal categorification, revisited
 July 7  13, Representation Theory and Symplectic Algebraic Geometry, Luminy, I will not go.
 May 28  June 1, Conference on Geometry, Kyoto
 May 12  17, Perspectives in Representation Theory,
a conference celebrating the 60th birthday of Igor Frenkel, Yale
 Apr. 22  28, Knot homologies and BPS states, St. John, Virgin Islands
 Apr. 3  7, Progress in Quantum Field Theory and String Theory, Osaka City University
 AGT conjecture and Convolution algebras, pdf
 Mar. 19  30, MPIM, Bonn
 Mar. 12  16,
Groupement de Recherche G«±om«±trie Alg«±brique et G«±om«±trie Complexe,
CIRM, Luminy
 Instanton counting and Donaldson invariant
 Feb. 20  24, National University of Singapore
2011
 Dec. 13  16, SYMMETRIES, INTEGRABLE SYSTEMS AND REPRESENTATIONS, Lyon
 Oct. 30  Nov. 6, Losev visits Kyoto.
 Sep. 19  23, Shanghai Jiao Tong University
 Sep. 4  9, Cluster algebras, representation theory, and Poisson geometry, Banff
 July 25  29, Infinite Analysis 11, The University of Tokyo
 July 11, ORTS
 July 4, 7, 14, 21, JapanRussia Summer School
 June 20  23, Algebras, Quivers, and Representations, 2011 Abel Symposium, Sognefjord, Norway
June 15  17, Maulik ?
 Jan.4  July 1, MODULI SPACES, The Isaac Newton Institute for Mathematical Sciences in Cambridge
 Mar. 29  31, Miniworkshop on moduli of instantons, Nagoya University
Mar. 24  29, UKJAPAN MATHEMATICAL FORUM, Keio University
 Jan.  Apr., The interaction of representation theory with geometry
and combinatorics, Hausdorff Institute in Bonn
 Jan. 24  28,
Derived Categories 2011 Tokyo
 Jan. 7  11, IHES, Kaleidoscopic View of Modern Mathematics,
Rencontre autour des Publications Mathmatiques de l'IHS
 Title: Donaldson = SeibergWitten from Mochizuki's formula and instanton counting, pdf
2010
 Dec. 19  24, Derived categories of AlgebroGeometric origin and integrable systems, the 15th Midrasha Mathmaticae, Jerusalem
 Title: Quiver varieties and cluster algebras, I, II, III
 Nov. 24  26, Workshop on Quantum Geometry, Kyoto
 Speakers : Sergei Gukov, Olivier Schiffmann, Ben Webster
 Nov. 23, Takagi Lectures, Kyoto
 Sep. 12  17, KIAS
 Aug. 9  14, The Xian conference on representation theory
> I cannot go because of the exam.
 Aug. 7, 8, 13, 14, 15, ICRA XIV, International Conference on Representations of Algebras and Workshop, Tokyo, Japan
 Aug. 2  6, Representation Theory of Algebraic Groups and quantum groups, Nagoya
 Cluster algebras and quantum affine algebras
 Abstract:
I will explain what is a cluster algebra and why it is useful to understand the representation theory of a quantum affine algebra.
 July 26, 5th Pacific Rim Complex / Symplectic Geometry 2010, Nagoya
 Donaldson = SeibergWitten from Mochizuki¡Çs formula and instanton counting
 July (2+1/2 weeks), UK tour
 May 25  29,
Quiver varieties and crystal bases of quantum affine algebras,
NSFCBMS Conferences, North Carolilna State University
 Mar. 13  16,
Algebraic Analysis and Beyond, Kyoto
 Title: Donaldson = SeibergWitten from Mochizuki's formula and instanton counting
 Jan. 10  18,
Quantum integrable systems and supersymmetric gauge theories, Simons Center for Geometry and Physics, StonyBrook
 Donaldson = SeibergWitten from Mochizuki's formula and
the instanton counting for the theory with a fundamental matter
 abstract
 Note
2009
 Dec. 7  11,
Mirror Symmetry and GromovWitten Invariants,
Univ. of Tokyo
 Sep. 14  18,
Instantons, Quivers,
DonaldsonThomas invariants, and noncommutative geometry, CIRM, Luminy
 Aug. 24  28,
Arithmetic Geometry and Moduli Spaces in Algebraic Geometry
, HangZhou, China
 Title: Perverse Coherent Sheaves on BlowUp
 July 6  16, Combinatorial and Geometric Structures in Representation Theory, Durham University (I will not go.)
 Geometric Representation Theory and Extended Affine Lie Algebras,
Fields Institute Summer School, University of Ottawa
 June 6, 7, Takagi Lectures, Hokkaido University
 Speakers : McDuff, Khovanov
 May 18  22,
Focus Week on New Invariants and Wall Crossing
IPMU
 Apr. 19  22, Tamas Hausel will visit us.
 March 8  14,
Enveloping Algebras and Geometric Representation Theory,
Oberwolfach

Algebraic Lie Theory, Newton Institute for Mathematical Sciences (I will not go.)

MSRI PROGRAM in ALGEBRAIC GEOMETRY in 2009, MSRI (I will not go.)
 March 2  5,
Clay Lectures on Mathematics,
RIMS, Kyoto

Quiver Varieties and Geometric Langlands Correspondence for Affine Lie Algebras
 Abstract
 Notes for my talks,
part 1,
part 2
 Feb. 16  20,
Quantum algebra related to various topological field theories in geometries,
Kyoto
 Title : Quiver Varieties and Geometric Langlands Correspondence for Affine Lie Algebras
 Jan. 19  24,
Mirror Symmetry and related topics, Univ. of Miami
 Title : Instanton counting and wallcrossing in Donaldson invariants
 Abstract
 PDF files
2008

Dec. 15  20, 2008 Osaka City University
International Academic Symposium¡È Riemann Surfaces, Harmonic Maps and Visualization ¡É
 Title : Instanton counting (survey)
 Abstract
 Oct. 4, 5 : The 5th Takagi Lectures, Univ. of Tokyo
 Sep. 9  13, HongKong
 Sep. 10, Seminar,
Counting inariant of perverse coherent sheaves and its wallcrossing,
pdf of my resume.
 Sep. 11, 12, Workshop,
Quiver Varieties and double affine Grassmannian,
pdf of my note.
 Sep. 1  5,
Combinatorics and Representation Theory, Nagoya Univ.
 Aug. 26  30,
Crystals and Tropical Combinatorics,
Kyoto, Kansai Seminar House
 July 28  Aug. 8, The 1st MSJSI Probabilistic approach to Geometry, Kyoto
 July 7  11, Geometric Langlands program, Leiden
 June 16  July 4, Geometric Methods in Representation Theory,
Grenoble
 June 21, The fourth Takagi Lectures, Kyoto
 June 9  13,
Moduli spaces and birational geometry,
RIMS,
 Wallcrossing for moduli of perverse coherent sheaves
 May 19  24,
Bert Kostant's 80th birtday conference,
Pacific Institute for the Mathematical Sciences, University of British Columbia
 Feb. 26,
BerkeleyStanford Algebraic Geometry Colloquium,
(Conjectural) triply graded link homology groups of the Hopf
link and Hilbert schemes of points on the plane
 Feb. 25, Stanford,
Perverse coherent sheaves on blowup surfaces,
pdf of my note
 Feb. 22,
Columbia Algebraic Geometry Seminar,
Perverse coherent sheaves on blowup surfaces
Feb. 15, Feb.29,
Princeton Symplectic geometry seminar,
(Conjectural) triply graded link homology groups of the Hopf
link and Hilbert schemes of points on the plane,
pdf of my note
2007
 2007 Sep.  2008. Mar., New Connections of Representation Theory to Algebraic Geometry and Physics, Institute of Advanced Study
 2008 Mar. 10  14, AlgebroGeometric Derived Categories and Applications
 2007 Nov. 26  30, Gauge Theory and Representation Theory
 Instanton counting and wallcrossing formulas for Donaldson invariants,
pdf
 Seminars on Instanton counting and knot invariants
 Sep. 28, Overview, by myself, pdf of my note
 Oct. 5, JonesWitten (ChernSimons) invariants, by myself,
pdf of my note
 Oct. 12, ChernSimons Theory as String Theory, by Johannes Walcher
 Oct. 19, Large N Open/Closed Duality in Topological String Theory, by Andrew Neitzke
 Oct. 26, continued, by Andrew Neitzke
 Nov. 2, Instanton counting by myself,
pdf of my note
 Nov. 9, Topological vertex by Liu,
 Nov. 14, continued, by Liu
 Nov. 16, (in Discussion session) summary by myself,
pdf of my note
 Dec. 7, SeibergWitten curve,
pdf of my note
 Dec. 14, SeibergWitten curve Part 2,
pdf of my note
 Oct. 17, Princeton Univ., Geometry, Representation theory, and Moduli Seminar,
Perverse coherent sheaves on a blowup surface II, pdf of my note
 Oct. 10, Princeton Univ., Department Colloquium, Perverse coherent sheaves on a blowup surface, pdf of my note
 Aug. 8  12
Pacific Rim Complex Geometry Conference 2007,
Kobe, Japan
 Wallcrossing formula for Donaldson invariants and instanton counting
 June 25  30, Algebraic Analysis and Around, RIMS
 Title: Sheaves on ALE spaces and quiver varieties
 Abstract
 pdf file for the talk
 June 4  8,
Arithmetic harmonic analysis on character and quiver varieties,
American Institute of Mathematics, Palo Alto, California
 May 10  24,
Link homology and categorification, RIMS,
workshop in the RIMS International Research project `Mirror Symmetry and Topological Field Theory'
(organized together with Fukaya et al, April 2007  March 2008),
 Mar. 5 8,
Exploration of New Structures and Natural Constructions in Mathematical Physics, Nagoya Univ.
 Ktheoretic Donaldson invariants via instanton counting,
pdf
2006
 Sep. 13  17,
Representations of Quivers, Singularities and Lie Theory,
Morningside Center of Mathematics, Chinese Academy of Sciences, Beijing
 Title : Quiver varieties and Kashiwara's crystal, I, II, III
 Abstract
 Aug. 10  21, ICTP
 July 25  27, Workshop on Mathematical Aspects of Topological Strings, Hokkaido Univ.,
Talk Title : Computation of Betti numbers of quiver varieties
 June 12  17, Representation Theory of algebraic groups and quantum groups, Nagoya Univ.
 Tanalog of qcahracters of finite dimensional representations of quantum affine algebras  explicit examples
 abstract
 OHP sheets
 Jan.  June
New topological structures in Physics, MSRI
 Mar. 15  17, Harvard Univ.
 Mar. 16, NortheasternBrandeisMITHarvard Colloquium,
 Title : Instanton counting and Donaldson invariants
 Abstract
 Mar. 17, Gauge theory and topology seminar,
Ktheoretic Donaldson invariants
2005
 Dec. 12  16,
Algebraic Geometry & Beyond, Kyoto
 Dec. 4  Dec. 18,
Iain Gordon visits us.
Seminar
 Dec. 8, 13:30  15:00, Room 152
 Dec. 9, 13:30 
 Nov. 28  Dec. 10,
Tamas Hausel visits us.
Seminar
 Nov. 29, 15:00  16:30, Room 609
 Dec. 1, 13:30  , Room 604
 Oct. 813,
Progress in algebraic geometry inspired by physics
,
Banff International Research Station
 Aug. 10  Sep. 1,
KITP program on Mathematics and String Theory
 July 2529,
AMS Summer Institute, Algebraic Geometry, University of Washington, Seatle
Instanton Counting : the Ktheoretic version
 July 2023,
Asian Mathematical Conference 2005 (AMC 2005), Singapore
Instanton counting
 Jan. 22  26,
Periods,
RIMS
 Jan. 18  20,
Floer homology and related topics¡¡3, Kyoto Univ.
2004
 Dec. 18  21, Differential Geometry in Nagoya 2004 (I did not go.)
 Dec. 9  11, Complex Geometry and String Theory, Nagoya Univ.
 Nov. 26  Dec. 11 (?),
Nikita Nekrasov visits Kyoto
 Oct. 2327,
Geometric Aspects of the Langlands Program, AMS meeting, Special Session, Chicago
 August, Method of Algebraic Analysis in Integrable Systems, Representation Theory and Geometry, RIMS
 July 2630, Mathematical Aspects of String Theory, RIMS
Donaldson invariants of toric surfaces via instanton counting, pdf for ohp
 July 1016,
AMS, IMS, SIAM Joint summer research conferences,
Representations of Algebraic Groups, Quantum Groups, and Lie Algebras,
Utah, Snowbird
 March 3  20, France
 Jan. 2630, Enumerative geometry on moduli spaces, Kyoto University, Instanton counting I
 Jan. 614, International Colloquium on "Algebraic Groups and
Homogeneous Spaces",
Tata Institute of Fundamental Research, India,
Crystal bases of quantum affine algebras
2003
 Jan. 16, 109th annual meeting of AMS,
Baltimore, Maryland, AMS
 Feb. 20,
HarvardMITBrandeisNortheastern Colloquia, USA,
Quiver varieties and quantum toroidal algebras
 June 18, Moduli Spaces, Lie Theory and their interaction with Theorethical Physics,
Cortona, Italy, Instanton counting on blowups
 June 1619, Workshop on Quantum Cohomology, RIMS, Kyoto, Introduction to moduli spaces of instantons on R^4
 July 1420, Algebraic structures and moduli spaces,
CRM, University of Montreal, Montreal, Canada, Instanton counting on blowup. I, II, III, IV.
 Aug. 18  21, The 50th Geometry Symposium, Hokkaido Univ.
2002
 Jan. 7  11,
Categorical Algebra, Deformation Theory and Field Theory, Kyoto,
Quiver varieties and quantum affine algebras
 Feb. 5  8,
Dbranes and Mirror symmetry, RIMS
 March, MSRI, Infinitedimensional algebras and mathematical physics
talk,
KirillovReshetikhin modules of quantum affine algebras
 April 57,
CONFERENCE ON HILBERT SCHEMES, VECTOR BUNDLES AND THEIR INTERPLAY WITH REPRESENTATION THEORY,
,
University of Missouri,
Homology groups of moduli spaces of sheaves on K3 surfaces
 April  June, Noncommutative phenomena in mathematics and theoretical physics, Centre for Advanced Study,
Quiver varieties
 June,
Groups and Geometry, ALGEBRAIC TRANSFORMATION GROUPS, Montreal,
Quiver varieties and finite dimensional representations of quantum affine algebras
 July, Newton Institute
 Aug. 14  18, Satelite conference, Stringy Orbifolds, Sichuan University,
Towards derived category of coherent sheaves on quiver varieties
 Aug. 20  28, ICM 2002, Beijing,
List of plenary speakers,
List of invited speakers
 Aug. 29  Sep. 2, Satellite conference, Algebra, Suzhou Univ,
Extremal modules of quantum affine algebras
 Dec. 16  20, A workshop organized by Fukaya, Kyoto
2001
 March,
Program on Lie groups 2001,
The University of HongKong,
Lecture Announcement
 June 18  July 13,
The Duality Workshop: A Math/Physics Collaboration,
University of California, Santa Barbara,
Equivariant Ktheory of Moduli of Sheaves on ALE Spaces
 Aug. 1  10,
10th Mathematical Society of Japan International Research Institute,
Representation Theory of algebraic groups and quantum groups,
Sophia University, Tokyo,
Quiver varieties and quantum affine algebras,
 Aug. 26  Sep. 1,
Complex Geometry: Interactions between Algebraic, Differential, and
Symplectic Geometry, Oberwolfach,
Homology of moduli spaces of sheaves on a $K3$ surface
 Sep. 3  Sep. 7,
Geometry of Moduli spaces and Integrable Systems,
RIMS
 Oct. 22  26,
Combinatorial and geometric representation theory,
Seoul National University,
Quiver varieties and crystals
2000
 July 9  21,
Representation Theory  2000,
The Erwin Schroedinger International Institute for Mathematical Physics,
Vienna, Austria
 July 17,
Quiver varieties and finite dimensional representations of quantum affine algebras
 July  Aug. JapanBritain Joint Research Project 2000 at Warwick
 Aug. 14  18,
Symplectic Geometry and Mirror Symmetry, KIAS ,
On McKay correspondence
 Aug. 21  26, International Workshop on Physics and Combinatorics 2000,
Nagoya Univ.
 ``$t$analogue of the $q$characters of finite dimensional
representations of quantum affine algebras'',
OHP sheets
(gzipped ps file)
 Sep. 10  17, Summer School Geometry of quiver representations and preprojective algebras, Univ. of Sussex, U.K., Quiver varieties and quantum affine algebras, I,II, III
 Nov. 27  Dec. 1, Modular invariance, ADE, subfactors, vertex operator algebras and Hilbert schemes, Kansai Seminar House, Kyoto
1999
1998