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講演記録 (2000-) 


  1. Rational double points on complex Enriques surfaces
    Geometry and Representation Theory Seminar
    25 September, 2017
    Queen's University, Kingston, Canada
  2. Rational double points on complex Enriques surfaces
    Workshop on Calabi-Yau manifolds: Arithmetics, Geometry and Physics
    08 August, 2017
    Gakushuin University
  3. Automorphisms of K3 surfaces and Enriques surfaces
    slides
    Hakodate workshop on arithmetic geometry 2017
    29 May, 2017
    Hakodate
  4. On an Enriques surface associated with a quartic Hessian surface
    Oberseminar Algebraische und Arithmetische Geometrie
    04 May, 2017
    Leibniz Universit"at Hannover
  5. On an Enriques surface associated with a quartic Hessian surface
    "Algebraic Geometry Conference"
    29 Mar, 2017
    Haeundae, Busan

  6. On an Enriques surface associated with a quartic Hessian surface
    "Topology of Singularities"
    21 Feb, 2017
    Vietnam Institute for Advanced Study in Mathematics, Hanoi

  7. Connected components of the moduli of elliptic K3 surfaces
    "The 10th Arithmetic and Algebraic Geometry"
    14 Dec, 2016
    The University of Tokyo

  8. Connected components of the moduli of elliptic K3 surfaces
    slides
    "The 4th Franco-Japanese-Vietnamese Singularities"
    09 Nov, 2016
    University Savoie Mont Blanc, Chambery

  9. A smooth quartic surface containing 56 lines
    slides
    "Algebra, geometry and topology of singularities"
    13 May, 2016
    Galatasaray University, Istanbul

  10. Computer-aided calculations in the study of K3 surfaces
    slides
    Colloquium talk
    17 March, 2016
    Vietnam National University, Hanoi

  11. Automorphisms of supersingular K3 surfaces and Salem polynomials
    "Conference on K3 surfaces and related topics"
    16 November, 2015
    KIAS, Seoul

  12. On the topology of projective subspaces in complex Fermat varieties
    "Geometry, Topology and Combinatorics of Hyperplane Arrangements and Related Problems"
    16 September, 2015
    Facultad de Ciencias, Universidad de Zaragoza, Spain

  13. Automorphisms of supersingular K3 surfaces and Salem polynomials
    Tsuda College Mini-Workshop "Calabi-Yau Varieties: Arithmetic, Geometry and Physics"
    07 August, 2015
    Tsuda College, Tokyo

  14. On the topology of projective subspaces in complex Fermat varieties (joint work with Alex Degtyarev)
    Workshop "Motives and Algebraic Geometry"
    29 May, 2015
    Hokkaido University, Sapporo

  15. Holes of the Leech lattice and projective models of K3 surfaces
    Arithmetic and Algebraic Geometry 2015
    28 January, 2015
    Graduate School of Mathematical Sciences, The University of Tokyo

  16. K3 Surfaces and Lattice Theory
    slides
    Seminar of Group Algebraic topology
    02 December, 2014
    Vietnam Institute for Advanced Study in Mathematics, Hanoi

  17. K3 Surfaces and Lattice Theory
    slides , アブストラクト原稿
    日本数学会 秋季総合分科会 企画特別講演
    28 September, 2014
    広島大学

  18. K3 Surfaces and Lattice Theory
    slides
    Colloquium talk
    05 August, 2014
    National University of Singapore

  19. The graphs of Hoffman-Singleton, Higman-Sims, McLaughlin, and the Hermitian curve of degree 6 in characteristic 5
    slides , 報告集原稿
    第31回代数的組合せ論シンポジウム
    20 June, 2014
    東北大学片平さくらホール

  20. On the supersingular K3 surface in characteristic 5 with Artin invariant 1
    slides
    函館数論幾何ワークショップ
    28 May, 2014
    北海道教育大学函館校

  21. On the supersingular K3 surface in characteristic 5 with Artin invariant 1
    K3 surfaces and their moduli
    07 May, 2014
    Schiermonnikoog, Netherlands

  22. On the automorphism groups of certain singular K3 surfaces
    Oberseminar Algebraische und Arithmetische Geometrie
    28 April, 2014
    Leibniz Universit"at Hannover

  23. The graphs of Hoffman-Singleton, Higman-Sims, McLaughlin, and the Fermat curve of degree 6 in characteristic 5
    11 April, 2014
    広島大学理学研究科数学専攻 代数学セミナー

  24. An algorithm to compute automorphism groups of K3 surfaces
    Branched Coverings, Degenerations, and Related Topics 2014
    10 March, 2014
    Hiroshima University

  25. On the supersingular K3 surface in characteristic 5 with Artin invariant 1
    Arithmetic and Algebraic Geometry 2014
    27 January, 2014
    Graduate School of Mathematical Sciences, The University of Tokyo

  26. Borcherds method and automorphism groups of K3 surfaces
    a note for RIMS koukyuuroku
    Complex Analysis and Topology of Discrete Groups and Hyperbolic Spaces
    21 January, 2014
    RIMS, Kyoto University

  27. An algorithm to compute automorphism groups of K3 surfaces
    slides
    The Asian Mathematical Conference 2013 (AMC 2013)
    02 July, 2013
    Busan, Korea

  28. An algorithm to compute automorphism groups of K3 surfaces
    26 April, 2013
    広島大学理学研究科数学専攻 代数学セミナー

  29. Supersingular K3 surfaces with Artin invariant 10 (joint work with S. Kondo)
    New Trends in arithmetic and geometry of algebraic surfaces
    12 March, 2013
    CIRM, Luminy, France

  30. Supersingular K3 surfaces with Artin invariant 10 (joint work with S. Kondo)
    Arithmetic and Algebraic Geometry 2013
    29 January, 2013
    Graduate School of Mathematical Sciences, The University of Tokyo

  31. Genus 1 fibrations on supersingular K3 surfaces of Artin invariant 10 (joint work with S. Kondo)
    02 November, 2012
    広島大学理学研究科数学専攻 代数学セミナー

  32. On rational normal curves totally tangent to a Hermitian variety
    (報告集原稿)
    射影多様体の幾何とその周辺2012
    08 October, 2012
    高知大学理学部

  33. The automorphism group of Fermat quartic surface in characteristic 3 (joint work with S. Kondo)
    (報告集原稿)
    特異点と多様体の幾何学
    27 August, 2012
    山形大学理学部

  34. The automorphism group of a supersingular K3 surface with Artin invariant 1 in characteristic 3 (joint work with Shigeyuki Kondo (Nagoya))
    07 June, 2012
    広島大学理学研究科数学専攻 代数学セミナー

  35. Rational normal curves totally tangent to a Hermitian variety
    18, May 2012
    広島大学理学研究科数学専攻 代数学セミナー

  36. 超特異K3 曲面の次数2の射影モデルについて
    代数幾何ワークショップ
    08 December, 2011
    東京大学大学院数理科学研究科

  37. Supersingular K3 surfaces in characteristic 5
    代数幾何学研究集会-ファノ多様体と正標数上の話題を中心として-
    21 February, 2011
    九州大学伊都キャンパス数理学研究教育棟

  38. 標数5における超特異K3曲面
    slides
    日本数学会中四国支部
    29 January, 2011
    鳴門地場産業振興センター

  39. Supersingular K3 surfaces and lattice theory
    Arithmetic and Algebraic Geometry 2011
    21 January, 2010
    The University of Tokyo

  40. 超特異代数多様体について
    slides
    日本数学会
    24 September, 2010
    名古屋大学

  41. 小さい標数における超特異K3曲面の構成
    玉原特殊多様体研究集会
    8 September, 2010
    玉原国際セミナーハウス

  42. 小さい標数における超特異K3曲面について
    代数幾何研究集会2010
    17 July, 2010
    法政大学小金井キャンパス

  43. Lattices of algebraic cycles in positive characteristics
    5th Pacific Rim Conference on Mathematics
    02 July, 2010
    Stanford University

  44. Lattices of algebraic cycles on varieties of Fermat type (joint work with Nobuyoshi Takahashi)
    slides
    Algebraic Geometry in Characteristic p and Related Topics
    19 February, 2010
    The University of Tokyo

  45. On lattice-invariants of complex algebraic surfaces and their applications
    slides
    Symposium in algebraic geometry
    28 December, 2009
    Busan, Korea

  46. 超特異K3曲面と格子理論
    slides
    代数学と計算
    04 December, 2009
    首都大学東京

  47. Transcendental lattices of complex algebraic surfaces
    slides
    Tohoku-Fudan joint symposium on algebraic geometry
    25 November, 2009
    Tohoku University, Sendai

  48. Transcendenlatl lattices of surfaces
    Workshop "Category Theory , Computer Science and Topology"
    18 October, 2009
    信州大学

  49. Remarks on Zariski pairs of surfaces in the projective space
    Seminar Talk
    24 September, 2009
    Fudan University, ShangHai, China

  50. Zariski pairs of normal surfaces in P^3
    The 5th Franco-Japanese Symposium on Singularities
    27 August, 2009
    IRMA, Strasbourg, France

  51. On lattice-theoretic invariants of curves on a surface
    slides
    The 2nd MSJ-SI Arrangements of Hyperplanes
    12 August, 2009
    Hokkaido University, Sapporo

  52. Links of hypersurface simple K3 singularities (joint work with A. Katanaga)
    Hodge theory and algebraic geometry
    3 July, 2009
    RIMS, Kyoto

  53. Zariski pairs and lattice theory
    slides
    Antalya Algebra Days XI
    24 May, 2009
    Antalya, Turk

  54. Zariski pairs and lattice theory
    General Seminar
    18 May, 2009
    Bilkent University, Ankara, Turk

  55. Splitting curves for the double covering branching along a plane curve of degree 6
    第4回代数・解析・幾何学セミナー
    18 February, 2009
    鹿児島大学

  56. Splitting curves for the double covering branching along a plane curve of degree 6, II and III
    特異点セミナー
    23 January, 2009
    東京理科大学

  57. On equisingular families of plane curves of degree 6
    slides
    Arithmetic and Algebraic Geometry Related to Moduli Spaces
    19 January, 2009
    The University of Tokyo

  58. Generalized Zariski-van Kampen theorem and its application to Grassmannian dual varieties
    Conference on Topology-Geometry-Algebra-Arithmetic
    22 December, 2008
    Dalat University, Dalat, Vietnam

  59. Splitting curves for the double covering branching along a plane curve of degree 6
    16 December, 2008
    Singularity Seminar, Tokyo University of Science 

  60. Generalized Zariski-van Kampen theorem
    13 November, 2008
    Algebraic Geometry in East Asia, KIAS, Seoul 

  61. Splitting curves for double sextic planes
    07 November, 2008
    Algebraic Geometry in Positive Characteristics and Related Topics, Nagoya University 

  62. Generalized Zariski-van Kampen theorem and its application to Grassmannian dual varieties
    27 August, 2008
    Colloquium at Department of Mathematics, National University of Singapore  

  63. Zariski-van Kampenの定理の一般化とグラスマン双対多様体
    June 17, 2008
    広島大学理学研究科数学専攻 トポロジー・幾何セミナー

  64. 正標数の代数多様体のチャーン数について
    April 25, 2008
    広島大学理学研究科数学専攻 代数学セミナー

  65. Dessins d'enfants and transcendental lattices of singular K3 surfaces
    slides
    酒井文雄先生還暦記念研究集会
    March 10, 2008
    埼玉大学理学部数学教室

  66. Topology and arithmetic of maximizing sextics
    slides
    SNU-HU 5th Joint Symposium on Mathematics
    January 25, 2008
    Seoul National University, Seoul, Korea

  67. 数論的 Zariski pairsについて 
    slides
    January 15, 2008
    広島大学理学研究科数学教室 談話会
  68. Singular K3 surfaces and non-homeomorphic conjugate varieties 
    slides
    Algebraic Geometry and Commutative Algebra Tokyo 2007 
    December 14, 2007
    Graduate School of Mathematical Sciences, The University of Tokyo
  69. 集中講義: 格子理論とK3曲面
    November 26-30, 2007
    東京大学大学院数理科学研究科
  70. Fundamental groups of complements of dual varieties in Grassmannian 
    slides
    高次元代数多様体とベクトル束の代数幾何学
    September 11, 2007
    九州大学理学部,博多
  71. Transcendental lattices and supersingular reduction lattices of a singular K3 surface
    slides
    COE seminar on algebraic geometry
    September 4, 2007
    Keio University, Hiyoshi, Tokyo
  72. Non-homeomorphic conjugate complex varieties
    slides
    Singularities in Geometry and Topology
    Fourth Franco-Japanese Symposium on Singularities
    August 30, 2007
    Tateyama Kokusai Hotel, Toyama
  73. Rational double points on K3 surfaces
    Niigata Workshop on Complex Geometry and Singularities
    August 24, 2007
    CrossPal Niigata, Niigata
  74. 数体上定義された特異 K3 曲面
    (報告集原稿)
    第52回代数学シンポジウム
    August 08, 2007
    Kobe University
  75. Fundamental groups of complements of dual varieties in Grassmannian
    slides
    Conference on Symplectic Geometry
    July 26, 2007
    RIMS, Kyoto
  76. Non-homeomorphic conjugate complex varieties
    slides
    6th Polish-Japanese Singularity Theory Working Days
    July 12, 2007
    Sopot, Poland
  77. 分岐曲線の補集合の基本群とリーマン面の単純ブレイド群
    第1回「 分岐被覆に関連する代数幾何とトポロジー」ワークショップ
    June 9, 2007
    東北学院大学工学部多賀城キャンパス
  78. Singular K3 surfaces and arithmetic Zariski pairs
    Seminar Talk
    March 8, 2007
    Vietnam National University, Hanoi
  79. Lectures: On Zariski -van Kampen theorem
    March 6-7, 2007
    Vietnam National University, Hanoi
  80. Transcendental lattices and supersingular reduction lattices of a singular K3 surface
    代数幾何学セミナー
    February 15, 2007
    名古屋大学
  81. On arithmetic Zariski pairs in degree 6
    特異点と基本群のワークショップ
    December 27, 2006
    東京理科大学
  82. On arithmetic Zariski pairs in degree 6
    Mini-workshop on hyperplane arrangements
    December 07, 2006
    Hokkaido University
  83. Singularities of dual varieties in characteristic 3
    slides
    International Symposium on singularity theory and its applications
    September 07, 2006
    Changsha, China
  84. Singularities of discriminant varieties in characteristic 2 and 3
    slides
    Algebraic Geometry in East Asia II
    October 13, 2005
    Hanoi, Vietnam
  85. Singularity theory in positive characteristics
    Department of Mathematics, National University of Singapore, Seminar Talk
    September 7, 2005

  86. Divisibility of certain Chern numbers
    5th Polish-Japanese Singularity Theory Working Days
    July 19, 2005
    Bukowina Tatrzanska, Poland
  87. Supersingular K3 surfaces as double covers of a projective plane
    Arithmetic and Algebraic Geometry 2004
    December 20, 2004
    The University of Tokyo
  88. Supersingular K3 surfaces in characteristic 2
    slides
    (報告集原稿)
    代数幾何と位相幾何の周辺
    2004年11月29日
    早稲田大学理工学部
  89. On topological fundamental groups of open algebraic varieties
    4th Polish-Japanese Singularity Theory Woking Days
    September 3, 2004
    Bedlewo, Poland
  90. Ternary codes and supersingular K3 surfaces in characteristic 3
    Tsuda College Mini-Workshop on Calabi-Yau Varieties, Mirror Symmetry and Related Topics
    2004年07月17日
    津田塾大学
  91. Moduli of supersingular K3 surfaces in characteristic 2
    slides
    Korea-Japan Conference on Algebraic Geometry, in honor of Professor Igor Dolgachev on his 60th birthday
    July 5, 2004
    Korea Institute for Advanced Study, Seoul, Korea
  92. 符号と超特異 K3 曲面のモジュライ
    (報告集原稿)
    第 21 回代数的組合せ論シンポジウム
    2004年06月29日
    信州大学理学部大会議室
  93. Moduli curves of supersingular K3 surfaces with Artin invariant 2 in characteristic 2
    代数幾何複素幾何金曜セミナー
    2004年05月21日
    大阪大学理学部数学教室
  94. 集中講義:代数多様体の基本群
    2004年01月13日-15日
    お茶の水大学
  95. Supersingular K3 surfaces
    Conference on Algebra-Geometry-Topology
    25 November, 2003
    Dalat University, Dalat, Vietnam

  96. Supersingular K3 surfaces in characteristic 2 as purely inseparable double covers of projective planes
    談話会
    2003年11月04日
    北海道教育大学函館校

  97. Supersingular K3 surfaces as double planes
    代数幾何学セミナー
    2003年10月27日
    名古屋大学多元数理研究科

  98. Supersingular K3 surfaces
    Mathematics of Nonlinear Structure
    Joint Symposium between Seoul National University and Hokkaido University
    October 18, 2003
    Seoul National University, Seoul, Korea

  99. Supersingular K3 surfaces
    3rd Japanese-Polish Singularity Theory Working Days
    September 28, 2003
    Hokkaido University

  100. Supersingular K3 surfaces as double covers of the projective plane
    (報告集原稿)
    代数曲線束の局所不変量の研究
    2003年6月18日
    京都大学数理解析研究所

  101. Variations on Zariski-van Kampen Theorem
    火曜トポロジーセミナー
    2003年6月17日
    東京大学大学院数理科学研究科

  102. 開代数多様体の基本群
    ENCOUNTER with MATHEMATICS 第27回 分岐被覆と基本群 --代数幾何とトポロジーの接点 --
    2003年4月12日
    中央大学理工学部

  103. Supersingular K3 surfaces as double covers of the projective plane
    Department of Mathematics, National University of Singapore, Seminar Talk
    March 26, 2003

  104. Rational double points on supersingular K3 surfaces
    神戸大学CAセミナー
    2002年11月19日

  105. 集中講義:代数多様体の基本群
    2002年11月18日-22日
    神戸大学
  106. Rational double points on supersingular K3 surfaces
    (報告集原稿)
    代数幾何学シンポジウム
    2002年10月23日
    兵庫県立城崎大会議館

  107. Rational double points on K3 surfaces
    Singularites franco-japonaises
    September 12, 2002
    CIRM, Luminy, France

  108. Elliptic K3 surfaces
    長沙電力学院, 湖南省, 中国
    June 6, 2002

  109. Variations of Zariski-van Kampen Theorem
    The fundamental group of algebraic varieties, Hokkaido University
    July 25, 2002

  110. 1. The fundamental groups of algebraic fiber spaces
    2. Vanishing cycles and the generalized Hodge conjecture
    Korea Institute for Advanced Study, Mathematics Seminars
    October 24, 2001

  111. Vanishing cycles and the generalized Hodge conjecture
    Polish-Japanese Singularity Theory Working Days September 20-27 , 2001
    The Mathematical Conference Center, Bedlewo, Poland

  112. Equisingular families of plane curves with many connected components
    Algebraic Geometry in East Asia August 9, 2001
    International Institute for Advanced Studies (Kyoto)

  113. The fundamental groups of algebraic fiber spaces
    Singularities and Related Subjects, Second Workshop In Changchun, July 8-10, 2001
    Northeast Normal University, Changchun, China

  114. Vanishing cycles and the generalized Hodge conjecture
    International Symposium on Singularity Theory and Its Applications, July 4-6, 2001
    Beijing University of Chemical Technology, Beijing, China

  115. Lectures on Zariski-van Kampen Theorem
    08-21 May, 2001
    Dalat University, Vietnam
  116. Lattices of algebraic cycles on Fermat varieties in positive characteristics
    Arithemetic and Algebraic Geometry, January 15-18, 2001
    Graduate School of Mathematical Sciences, The University of Tokyo

  117. 非可換基本群をもつZariski pairについて
    Branched Galois covers and related topics, 2000年12月11日-13日
    高知大学

  118. Fermat格子について
    名古屋大学多元数理研究科談話会
    2000年12月6日

  119. 集中講義:消失サイクルの幾何学と一般Hodge予想
    2000年12月4日-7日
    名古屋大学
  120. On elliptic K3 surfaces
    The mini workshop on explicit moduli in Sapporo, August 01-04, 2000
    Hokkaido University

  121. Lattices of algebraic cycles on Fermat varieties in positive characteristics
    (日本語原稿)
    有限群論と代数的組合せ論,   2000年1月17日
    京都大学 数理解析研究所

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