Hokuto Konno

Associate Professor
Graduate School of Mathematical Sciences
The University of Tokyo

Lecture series

    1. Diffeomorphism groups of 4-manifolds and gauge theory, Kyushu University, Nov. 2025 (4 hours × 4 times)
    2. Families Seiberg-Witten invariant, Mathematics and Physics of Gauge Theories, KKR Zushi, Jul. 2025 (1 hour × 2 times)
    3. Diffeomorphism groups and gauge theory for families, Science Tokyo, Jun.-Jul. 2025 (3 hours × 5 days)
    4. Real Seiberg-Witten theory, mini-course, Summer School on Modern Tools in Low-Dimensional Topology, International Centre for Theoretical Physics (ICTP), Jun. 2025 (45 minutes × 3 days)
    5. Lectures on Seiberg-Witten theory, Lecture series, Zhejiang University, Nov. 2024 (1.5 hours × 4 days)
    6. Gauge-theoretic characteristic classes/Dehn twists on 4-manifolds, Topology and Geometry of Low-Dimensional Manifolds 2024, Nara Women's University, Nov. 2024 (1 hour × 2 days)
    7. Seiberg-Witten theory for families, Gauge theory and its application to geometry and low-dimensional topology, University of Regensburg, Lecture Courses, Jul. 2023 (1 hour × 4 days)
    8. Seiberg-Witten theory and topology, Department of Mathematics, Kyoto University, Mar. and Jun. 2022 (2 hours × 5 days)
    9. Recent developments in Seiberg-Witten theory, Yau Mathematical Sciences Center, Tsinghua University [Online], Mar. 2022 (1.5 hours × 3 days)
    10. Seiberg-Witten theory for families I, II, 2021 Winter Mini Course - Gauge Theory Virtual, The United States [Online]，Jan. 2021（1 hour × 2 days）
    11. Seiberg-Witten theory 101 (seminar series), Intermediate notions seminar, The University of Adelaide, Mar. 2018（1 hour × 4 days）

Talks

    1. Diffeomorphism groups and gauge theory, 2026 Taiwan Mathematical Society Annual Meeting (Keynote Talk), National Chung Cheng University, Jan. 2026
    2. On diffeomorphisms of complex surfaces, Algebraic Geometry Seminar, The University of Tokyo, Dec. 2025
    3. On diffeomorphisms of irreducible 4-manifolds, Colloquium, Kyushu University, Nov. 2025
    4. Introduction to gauge theory for families, Symmetry and Geometry Seminar, Waseda University, Oct. 2025
    5. Family gauge theory and diffeomorphism groups, Interactions between arithmetic geometry and global analysis, University of Regensburg, Oct. 2025
    6. On exotic diffeomorphisms of 4-manifolds, Geometry Symposium (Plenary talk), University of Tsukuba, Aug. 2025
    7. Diffeomorphism groups of 4-manifolds, Colloquium, Institute of Science Tokyo, Jun. 2025
    8. Diffeomorphism groups and gauge theory for families, 2025 Georgia International Topology Conference, University of Georgia, May 2025
    9. On exotic diffeomorphisms of 4-manifolds, Gauge Theory and Floer Homology in Low Dimensional Topology, The Simons Center for Geometry and Physics, May, 2025
    10. Symplectic structures and diffeomorphisms of 4-manifolds, Knot Theory, Geometric Lie Group Theory and Its Application 2024, Tokyo University of Science, Mar. 2025
    11. Diffeomorphism groups and gauge theory for families, MSJ Spring Meeting 2025 (Award Lecture for the MSJ Spring Prize), Waseda University, Mar. 2025
    12. Symplectic structures and diffeomorphisms of 4-manifolds, Riemannian Geometry and Geometric Analysis, The University of Tokyo, Feb. 2025
    13. Diffeomorphism group and gauge theory, The 20th Kagoshima Algebra-Analysis-Geometry Seminar, Kagoshima University, Feb. 2025
    14. Irreducible 4-manifolds can admit exotic diffeomorphisms, Joint Los Angeles Topology Seminar, California Institute of Technology, Feb. 2025
    15. Irreducible 4-manifolds can admit exotic diffeomorphisms, East Asian Conference on Gauge theory and Related topics II, Nara Prefectural Convention Center, Dec. 2024
    16. Diffeomorphism group and gauge theory, Colloquium, University of Tsukuba, Dec. 2024
    17. Diffeomorphism group and gauge theory, Virtual Seminar on Geometry and Topology, Online (Korea), Nov. 2024
    18. Diffeomorphism group and gauge theory, Colloquium, The University of Tokyo, Oct. 2024
    19. Diffeomorphism groups of 4-manifolds are special, Geometry and Topology 2024, Kyushu University, Oct. 2024
    20. Dehn twists on 4-manifolds, Tuesday Seminar on Topology, The University of Tokyo, Oct. 2024
    21. Diffeomorphism group and gauge theory, MSJ Autumn Meeting 2024 (Award Lecture for the 2024 MSJ Geometry Prize), Osaka University, Sep. 2024
    22. Infiniteness of 4-dimensional diffeomorphism groups, Topologie, Oberwolfach Research Institute for Mathematics, Jul. 2024
    23. Infiniteness of 4-dimensional mapping class groups and characteristic classes, Topology Seminar, Princeton University, Apr. 2024
    24. Infiniteness of 4-dimensional mapping class groups and characteristic classes, Symplectic Geometry, Gauge Theory, and Low-Dimensional Topology Seminar, Simons Center for Geometry and Physics, Apr. 2024
    25. Infiniteness of 4-dimensional mapping class groups and characteristic classes, Gauge Theory & Low‐dimensional Topology, Royal Palm Hotel, Miami Beach, Apr. 2024
    26. From families Seiberg-Witten theory to corks, Differential Topology '24, Online [University of Tsukuba], Mar. 2024
    27. Infiniteness of 4-dimensional mapping class groups and characteristic classes, Topology seminar at the University of Texas at Austin, The University of Texas at Austin, Mar. 2024
    28. Spaces of positive scalar curvature metrics on 4-manifolds, Analysis, Geometry and Topology of Positive Scalar Curvature Metrics, Oberwolfach Research Institute for Mathematics, Feb. 2024
    29. Families Frøyshov invariant, Brandeis Topology Seminar, Brandeis University, Feb. 2024
    30. Infiniteness of 4-dimensional mapping class groups and characteristic classes, Rutgers Geometry/Topology seminar, Rutgers University, Jan. 2024
    31. Families Frøyshov invariant, Topology Seminar, Michigan State University, Nov. 2023
    32. Diffeomorphism groups and gauge theory, RTG Seminar, Michigan State University, Nov. 2023
    33. Families Froyshov invariant, Columbia Symplectic Geometry and Gauge Theory Seminar, Columbia University, Oct. 2023
    34. Exotic Dehn twists on 4-manifolds, UMass Geometry and Topology Seminar, University of Massachusetts Amherst, Oct. 2023
    35. Exotic Dehn twists on 4-manifolds, AMS Sectional Meeting, Creighton University, Oct. 2023
    36. Homological instability for moduli spaces of 4-manifolds, Mapping class groups: pronilpotent and cohomological approaches, SwissMAP Research Station, Sep. 2023
    37. Exotic Dehn twists on 4-manifolds, Gauge Theory and Topology: in Celebration of Peter Kronheimer's 60th Birthday, University of Oxford, Jul. 2023
    38. Exotic Dehn twists on 4-manifolds, Gauge theory and its application to geometry and low-dimensional topology, University of Regensburg, Jul. 2023
    39. Exotic Dehn twists on 4-manifolds, Topology of 3- and 4-dimensional manifolds, Princeton University, Jul. 2023
    40. Seiberg-Witten theory and moduli spaces of 4-manifolds and metrics, Differentialgeometrie im Grossen, Oberwolfach Research Institute for Mathematics, Jul. 2023
    41. Homological instability for moduli spaces of 4-manifolds, 2023 Georgia Topology Conference, University of Georgia, May 2023
    42. An exotic diffeomorphism of a contractible 4-manifold, Boston Graduate Topology Seminar, Massachusetts Institute of Technology, Apr. 2023
    43. Homological instability for moduli spaces of 4-manifolds, Symplectic Geometry, Gauge Theory, and Low-Dimensional Topology Seminar, Simons Center for Geometry and Physics, Apr, 2023
    44. Homological instability for moduli spaces of 4-manifolds, Gauge Theory in Kyoto, Kyoto University, Mar. 2023
    45. Homological instability for moduli spaces of 4-manifolds, Conference "Geometric Analysis", University of Regensburg, Mar. 2023
    46. Homological instability for moduli spaces of 4-manifolds, MIT Geometry and Topology Seminar, Massachusetts Institute of Technology, Feb. 2023
    47. Homological instability for moduli spaces of 4-manifolds, Brandeis Topology Seminar, Brandeis University, Jan. 2023
    48. Homological instability for moduli spaces of 4-manifolds, The 7th Japan-China Geometry Conference, Online [Hiroshima University]，Dec. 2022
    49. Cohomological Invariants in Gauge Theory for Families, Diffeomorphisms and Gauge Theory Seminar, Simons Laufer Mathematical Sciences Institute, Nov. 2022
    50. Equivariant K-Theory, Homotopy Computations and uses in Floer Theory Seminar, Simons Laufer Mathematical Sciences Institute, Oct. 2022
    51. Homological Instability in Dimension 4, FHT Program Seminar, Simons Laufer Mathematical Sciences Institute, Oct. 2022
    52. Dehn twists and Nielsen realization in dimension 4, Topological Studies around Riemann Surfaces, Online, Sep. 2022
    53. Seiberg-Witten Floer homotopy and its applications, Geometry Symposium (Plenary talk)，Tokyo University of Science, Aug. 2022
    54. Seiberg-Witten Floer homotopy, iTHEMS Math Seminar, RIKEN, Jul. 2022
    55. Gauge theory and the diffeomorphism groups of 4-manifolds, Colloquium, Kyoto University, Jun. 2022
    56. Floer K-theory for knots, Intelligence of Low-dimensional Topology, Online [Kyoto University], May 2022
    57. Nielsen realization, knots, and Seiberg-Witten (Floer) homotopy theory, Tuesday Seminar on Topology, Online [The University of Tokyo], May 2022
    58. Floer K-theory for knots, MIT Geometry and Topology Seminar, Online [MIT], Feb. 2022
    59. Positive scalar curvature and higher-dimensional families of Seiberg-Witten equations, Seminar on Seiberg-Witten theory, Online [Germany], Feb. 2022
    60. Floer K-theory for knots, Japan-Netherlands Joint Online Seminar, Online [Japan-Netherlands], Feb. 2022
    61. Floer K-theory for knots, Topology and Geometry of Low-dimensional Manifolds, Online [Japan-Europe], Jan. 2022
    62. Seiberg-Witten Floer K-theory for knots, CGP Seminar, Online [IBS-CGP], Jan. 2022
    63. Floer K-theory for knots, Stanford Topology Seminar, Online [Stanford University], Jan. 2022
    64. Involutions, knots, and Floer K-theory, Kansai Gauge Theory Seminar, Online [Kyoto University], Nov. 2021
    65. Exotic diffeomorphisms of 4-manifolds with boundary, Four Dimensional Topology, Online [Osaka University], Nov. 2021
    66. Involutions, knots, and Floer K-theory, Handle friendship seminar, Online, Nov. 2021
    67. Positive scalar curvature and homology cobordism invariants I, Kansai Gauge Theory Seminar, Online [Kyoto University], Jun. 2021
    68. Gauge theory and diffeomorphism and homeomorphism groups, MSJ Spring Meeting (Invited talk), Online [Keio University], Mar. 2021
    69. Taubes' theorem, Differential Topology '21, Online, Feb. 2021
    70. The groups of diffeomorphisms and homeomorphisms of 4-manifolds with boundary, Kansai Gauge Theory Seminar, Online [Kyoto University], Dec. 2020
    71. The groups of diffeomorphisms and homeomorphisms of 4-manifolds with boundary, Four Dimensional Topology, Online [Osaka University], Nov. 2020
    72. The groups of diffeomorphisms and homeomorphisms of 4-manifolds with boundary, International Workshop on 4-Manifold Theory and Gauge Theory, Online [Japan-Korea], Nov. 2020
    73. On the diffeomorphism and homeomorphism groups of a K3 surface, Japanese-European Symposium on Symplectic Varieties and Moduli Spaces – Fifth Edition Online, Online [Osaka City University], Sep. 2020
    74. Gauge theory and the diffeomorphism and homeomorphism groups of 4-manifolds, Tuesday Seminar on Topology, Online [The University of Tokyo], Jun. 2020
    75. Diff vs. Homeo in dimension 4: recent development, Kansai Gauge Theory Seminar, Online [Kyoto University], Apr. 2020
    76. Gauge theory and the automorphism groups of 4-manifolds, Topological invariants of the bulk and edge-of-edge states of higher order topological insulators, Osaka University, Feb. 2020
    77. The diffeomorphism and homeomorphism groups of K3, 4-Dimensional Topology and Gauge Theory, ESCALE-YOKOHAMA, Jan. 2020
    78. The diffeomorphism and homeomorphism groups of K3, Special seminar, Keio University, Dec. 2019
    79. The diffeomorphism and homeomorphism groups of K3, Four Dimensional Topology, Osaka University, Nov. 2019
    80. Positive scalar curvature and gauge-theoretic constraints on 4-manifolds, The first Geometry Conference for Friendship of Japan and Germany, Chuo University, Sep. 2019
    81. The diffeomorphism and homeomorphism groups of K3, MSJ Autumn Meeting, Kanazawa University, Sep. 2019
    82. Rigidity of the mod 2 families Seiberg-Witten invariants, MSJ Autumn Meeting, Kanazawa University, Sep. 2019
    83. How to use K-theory in gauge theory, Young mathematicians workshop on algebraic, geometric, and analytic aspects of K theory and vector bundles, University of the Ryukyu, Aug. 2019
    84. The diffeomorphism and homeomorphism groups of 4-manifolds, Floer Homotopy Theory and Low-Dimensional Topology, University of Oregon, Aug. 2019
    85. Difference between the diffeomorphism and homeomorphism groups of 4-manifolds, Four manifolds: Confluence of high and low dimensions, the Fields Institute, Jul. 2019
    86. Non-smoothable bundles and gauge theory for families, Geometry, Topology and Dynamics Seminar, the Okinawa Institute of Science and Technology, May 2019
    87. Characteristic classes defined using 4-dimensional gauge theory, Johnson homomorphisms and related topics 2019, The University of Tokyo, May 2019
    88. Gauge theory and symmetries of 4-dimensional spaces, iTHEMS Math Seminar, RIKEN, Apr. 2019
    89. The diffeomorphism and homeomorphism groups in dimension 4 and Seiberg-Witten theory, Chiba University Geometry Seminar, Chiba University, Apr. 2019
    90. Characteristic classes of 4-manifold bundles and gauge theory for families, Special seminar, Keio University, Mar. 2019
    91. Positive scalar curvature and 10/8-type inequalities on 4-manifolds with periodic ends, MSJ Spring Meeting, Tokyo Institute of Technology, Mar. 2019
    92. Gauge theory for families of 4-manifolds, Kanto Yong Geometry Seminar, The University of Tokyo, Feb. 2019
    93. Gluing formula for Seiberg-Witten invariants for families and group actions, Kansai Gauge Theory Seminar, Kyoto University, Jan. 2019
    94. Gluing formula for the families Seiberg-Witten invariant and its applications, Kansai Gauge Theory Seminar, Kyoto University, Dec. 2018
    95. Gauge theory for families of 4-manifolds, Seoul-Tokyo Conference in Mathematics, Korea Institute for Advanced Study, Dec. 2018
    96. Gauge theory for families of 4-manifolds, East Asian Conference on Gauge Theory and Related Topics, Kyoto University, Sep. 2018
    97. A family version of the Bauer-Furuta invariant and the complex of surfaces, Four Dimensional Topology, Osaka City University, Sep. 2018
    98. Characteristic classes via 4-dimensional gauge theory, Geometry Symposium, Tohoku University, Aug. 2018
    99. Gauge theory for families of 4-manifolds, Topology Symposium, Shinshu University, Aug. 2018
    100. Gauge theory for families of 4-manifolds, Gauge Theory and Applications, The University of Regensburg, Jul. 2018
    101. Characteristic classes via 4-dimensional gauge theory, Geometry seminar, Nagoya University, Jun. 2018
    102. Characteristic classes via 4-dimensional gauge theory, Tuesday Seminar on Topology, The University of Tokyo, Jun. 2018
    103. Family gauge theory and characteristic classes of bundles of 4-manifolds, Differential geometry seminar, The University of Adelaide, Mar. 2018
    104. Family gauge theory and characteristic classes of bundles of 4-manifolds, Gauge theory in Fukuoka, Kyushu University/Kanpo no Yado Yanagawa, Feb. 2018
    105. Characteristic classes of bundles of a 4-manifold via gauge theory, Four Dimensional Topology, Osaka City University, Nov. 2017
    106. Families of Seiberg-Witten equations and positive scalar curvature, Tokyo Tech Geometry seminar, Tokyo Institute of Technology, Nov. 2017
    107. Complex of embedded surfaces in a 4-manifold and family Seiberg-Witten theory, The East Asian Symplectic Conference, Sichuan University, Oct. 2017
    108. A cohomological Seiberg-Witten invariant emerging from the adjunction inequality, UCLA Topology Seminar, University of California, Los Angeles, Oct. 2017
    109. A cohomological Seiberg-Witten invariant, Kansai Gauge Theory Seminar, Kyoto University, Sep. 2017
    110. Positive scalar curvature and Seiberg-Witten invariants of tuples of diffeomorphisms, MSJ Autumn Meeting, Yamagata University, Sep. 2017
    111. A cohomological Seiberg-Witten invariant, Differential Topology Seminar, Kyoto University, Sep. 2017
    112. Lattice defects from monodromy, Mathematics in Interface, Dislocation and Structure of Crystals, Kyushu University, Aug. 2017
    113. A cohomological Seiberg-Witten invariant emerging from the adjunction inequality, Low Dimensional Topology and Gauge Theory, BIRS-CMO, Aug. 2017
    114. A cohomological Seiberg-Witten invariant, Germany-Japan One-Day Workshop on Geometry and Topology, Waseda University, May 2017
    115. Cohomological Seiberg-Witten invariant, Geometry and topology seminar, Keio University, Apr. 2017
    116. Cohomological Seiberg-Witten invariant, Geometry seminar, Nagoya University, Mar. 2017
    117. Genus bound problem and a cohomological Seiberg-Witten invariant, East Asian Core Doctorial Forum on Mathematics 2017，Seoul National University, Jan. 2017
    118. Complex of surfaces violating the adjunction inequalities, Four Dimensional Topology, Osaka City University, Nov. 2016
    119. Gauge theory and embeddings of surfaces into 4-manifolds, Mathematics and Physics, Nara Women’s University, Nov. 2016
    120. High-dimensional wall crossing and gluing in Seiberg-Witten theory, MSJ Autumn Meeting, Kansai University, Sep. 2016
    121. High-dimensional wall crossing and gluing in Seiberg-Witten theory, Geometry Symposium, Okayama Univeristy, Aug. 2016
    122. A family of the Seiberg-Witten equations and configurations of embedded surfaces in 4-manifolds, Topology/Singular Theory and Applications, Aoyama Gakuin University, Jun. 2016
    123. A family of the Seiberg-Witten equations and configurations of embedded surfaces in 4-manifolds, Intelligence of Low-dimensional Topology, Kyoto University, May 2016
    124. An invariant of 4-manifolds and the adjunction inequalities, Handle friendship seminar, Tokyo Institute of Technology, Apr. 2016
    125. Seiberg-Witten theory and the adjunction inequalities, Differential Topology 16, University of Tsukuba, Mar. 2016
    126. Bounds on genus and configurations of embedded surfaces in 4-manifolds, MSJ Spring Meeting, University of Tsukuba, Mar. 2016
    127. Bounds on genus and configurations of embedded surfaces in 4-manifolds, Kansai Gauge Theory Seminar, Kyoto University, Mar. 2016
    128. Bounds on genus and configurations of embedded surfaces in 4-manifolds, Berkeley-Tokyo Winter School "Geometry, Topology and Representation Theory" University of California, Berkeley
    129. Bounds on genus and configurations of embedded surfaces in 4-manifolds, Four Dimensional Topology, Osaka City University, Nov. 2015
    130. Bounds on genus and configurations of embedded surfaces in 4-manifolds, Geometry Seminar, Tokyo Metropolitan University, Nov. 2015
    131. Bounds on genus and configurations of embedded surfaces in 4-manifolds, Handle friendship seminar, Tokyo Institute of Technology, Sep. 2015
    132. The generalized Thom conjecture and Seiberg-Witten wall crossing, Topology Seminar, Gakushuin University, Jul. 2015
    133. The moduli space of flat SU(2)-connections on a surface with boundary: an example, Mini-workshop on symplectic geometry of moduli spaces of connections, Waseda University, Feb. 2014