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先頭に戻る
講演記録 (2000-)
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Topology of a double plane branching along a real line arrangement
Seminar talk at Dalat University
December 8, 2023
Dalat, Vietnam
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Vanishing cycles of a double plane branching along a real line arrangement
slides
Workshop "Topology of Singularities and Related Topics"
September 11, 2023
Quy Nhon, Vietnam
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Conway theory for algebraic geometers
Working Workshop on
Calabi--Yau Varieties and Related Topics 2023
July 22, 2023
Hokkaido University
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K3曲面の自己同型群の計算について
杉本代数セミナー
July 14, 2023
大阪公立大学杉本キャンパス
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あるK3曲面の自己同型群について
K3, Enriques Surfaces, and Related Topics
March 23, 2023
名古屋大学多元数理研究科
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The automorphism group of a K3 surface birational to a double plane
Real Aspects of Geometry
November 4, 2022
CIRM,
Luminy, France
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Mordell-Weil groups of a certain K3 surface
slides
Recent Development in Algebraic Geometry
August 30, 2022
National University of Singapore
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Lectures: Computational tools in the study of K3 surfaces
July 11--15, 2022
Graduate School of Mathematics, Nagoya University
Lecture Notes
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Automorphism groups of Enriques surfaces
(joint work with Simon Brandhorst)
slides
Japanese-European Symposium on Symplectic Varieties and Moduli Spaces -- Sixth Edition
March 16, 2022
Zoom
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Computation of automorphism groups of Enriques surfaces
(joint work with Simon Brandhorst)
slides
ODTU-Bilkent Algebraic Geometry Seminar
December 17, 2021
Zoom
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Computation of the nef cone and the automorphism group of an Enriques surface
(joint work with Simon Brandhorst)
slides
Online Workshop on Calabi-Yau Varieties and Related Topics
October 14, 2021
Zoom
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Computation of automorphism groups of
K3 and Enriques surfaces
slides
proceedings
代数学シンポジウム
September 04, 2019
東北大学
-
The automorphism groups of Enriques surfaces covered by a Jacobian Kummer surface
Seminar talk
May 15, 2019
Saarland University
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The automorphism groups of Enriques surfaces covered by a Jacobian Kummer surface
Seminar talk
May 14, 2019
Johannes Gutenberg University Mainz
-
The automorphism groups of Enriques surfaces
Seminar talk
February 21, 2019
Vietnam National University of Science, Hanoi, Vietnam
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Enriques involutions on singular K3 surfaces of small discriminants
(joint work with Davide Cesare Veniani)
Arithmetic and Algebraic Geometry 2019
January 21, 2019
University of Tokyo
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The elliptic modular surface of level 4 and its reduction modulo 3
Algebraic Geometry in Positive Characteristic and Related Topics
December 20, 2018
University of Tokyo
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The elliptic modular surface of level 4 and its reduction modulo 3
Working Workshop on
Calabi-Yau Varieties and Related Topics
August 10, 2018
Gakushuin University
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An even extremal lattice of rank 64
組合せ論セミナー
December 22, 2017
東北大学情報科学研究科 Graduate School of Information Sciences, Tohoku University
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An Enriques involution of the Fermat quartic surface in characteristic 3
K3 surfaces and Realted Topics
December 21, 2017
Nagoya University
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Lectures: On Zariski-van Kampen theorem
November 29- December 2, 2017
Tribhuvan University, Kirtipur, Nepal
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Rational double points on complex Enriques surfaces
Geometry and Representation Theory Seminar
25 September, 2017
Queen's University, Kingston, Canada
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Rational double points on complex Enriques surfaces
Workshop on Calabi-Yau manifolds: Arithmetics, Geometry and Physics
08 August, 2017
Gakushuin University
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Automorphisms of K3 surfaces and Enriques surfaces
slides
Hakodate workshop on arithmetic geometry 2017
29 May, 2017
Hakodate
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On an Enriques surface associated with a quartic Hessian surface
Oberseminar Algebraische und Arithmetische Geometrie
04 May, 2017
Leibniz Universit"at Hannover
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On an Enriques surface associated with a quartic Hessian surface
"Algebraic Geometry Conference"
29 Mar, 2017
Haeundae, Busan
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On an Enriques surface associated with a quartic Hessian surface
"Topology of Singularities"
21 Feb, 2017
Vietnam Institute for Advanced Study in Mathematics, Hanoi
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Connected components of the moduli of elliptic K3 surfaces
"The 10th Arithmetic and Algebraic Geometry"
14 Dec, 2016
The University of Tokyo
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Connected components of the moduli of elliptic K3 surfaces
slides
"The 4th Franco-Japanese-Vietnamese Singularities"
09 Nov, 2016
University Savoie Mont Blanc, Chambery
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A smooth quartic surface containing 56 lines
slides
"Algebra, geometry and topology of singularities"
13 May, 2016
Galatasaray University, Istanbul
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Computer-aided calculations in the study of K3 surfaces
slides
Colloquium talk
17 March, 2016
Vietnam National University, Hanoi
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Automorphisms of supersingular K3 surfaces and Salem polynomials
"Conference on K3 surfaces and related topics"
16 November, 2015
KIAS, Seoul
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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
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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
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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
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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
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K3 Surfaces and Lattice Theory
slides
Seminar of Group Algebraic topology
02 December, 2014
Vietnam Institute for Advanced Study in Mathematics, Hanoi
-
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
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K3 Surfaces and Lattice Theory
slides
Colloquium talk
05 August, 2014
National University of Singapore
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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
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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
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On the supersingular K3 surface in characteristic 5 with Artin invariant 1
K3 surfaces and their moduli
07 May, 2014
Schiermonnikoog, Netherlands
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On the automorphism groups of certain singular K3 surfaces
Oberseminar Algebraische und Arithmetische Geometrie
28 April, 2014
Leibniz Universit"at Hannover
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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
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An algorithm to compute automorphism groups of K3 surfaces
Branched Coverings, Degenerations, and Related Topics 2014
10 March, 2014
Hiroshima University
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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
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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
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An algorithm to compute automorphism groups of K3 surfaces
slides
The Asian Mathematical Conference 2013 (AMC 2013)
02 July, 2013
Busan, Korea
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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Supersingular K3 surfaces and lattice theory
Arithmetic and Algebraic Geometry 2011
21 January, 2010
The University of Tokyo
-
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
-
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
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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
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Lattices of algebraic cycles in positive characteristics
5th Pacific Rim Conference on Mathematics
02 July, 2010
Stanford University
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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
-
On lattice-invariants of complex algebraic surfaces and their applications
slides
Symposium in algebraic geometry
28 December, 2009
Busan, Korea
-
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
-
Transcendental lattices of complex algebraic surfaces
slides
Tohoku-Fudan joint symposium on algebraic geometry
25 November, 2009
Tohoku University, Sendai
-
Transcendenlatl lattices of surfaces
Workshop "Category Theory , Computer Science and Topology"
18 October, 2009
信州大学
-
Remarks on Zariski pairs of surfaces in the projective space
Seminar Talk
24 September, 2009
Fudan University, ShangHai, China
-
Zariski pairs of normal surfaces in P^3
The 5th Franco-Japanese Symposium on Singularities
27 August, 2009
IRMA, Strasbourg, France
-
On lattice-theoretic invariants of curves on a surface
slides
The 2nd MSJ-SI Arrangements of Hyperplanes
12 August, 2009
Hokkaido University, Sapporo
-
Links of hypersurface simple K3 singularities (joint work
with A. Katanaga)
Hodge theory and algebraic geometry
3 July, 2009
RIMS, Kyoto
-
Zariski pairs and lattice theory
slides
Antalya Algebra Days XI
24 May, 2009
Antalya, Turk
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Zariski pairs and lattice theory
General Seminar
18 May, 2009
Bilkent University, Ankara, Turk
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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
-
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
-
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
-
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
-
Splitting curves for the double covering branching along a plane curve of degree 6
16 December, 2008
Singularity Seminar,
Tokyo University of Science
-
Generalized Zariski-van Kampen theorem
13 November, 2008
Algebraic Geometry in East Asia,
KIAS, Seoul
-
Splitting curves for double sextic planes
07 November, 2008
Algebraic Geometry in Positive Characteristics and Related Topics,
Nagoya University
-
Generalized Zariski-van Kampen theorem and its application
to Grassmannian dual varieties
27 August, 2008
Colloquium at Department of Mathematics,
National University of Singapore
-
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
-
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
-
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
-
Topology and arithmetic of maximizing sextics
slides
SNU-HU 5th Joint Symposium on Mathematics
January 25, 2008
Seoul National University, Seoul, Korea
-
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
-
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
-
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
-
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
-
Transcendental lattices and supersingular reduction lattices of a singular K3 surface
slides
COE seminar on algebraic geometry
September 4, 2007
Keio University, Hiyoshi, Tokyo
-
Non-homeomorphic conjugate complex varieties
slides
Singularities in Geometry and Topology
Fourth Franco-Japanese Symposium on Singularities
August 30, 2007
Tateyama Kokusai Hotel, Toyama
-
Rational double points on K3 surfaces
Niigata Workshop on Complex Geometry and Singularities
August 24, 2007
CrossPal Niigata, Niigata
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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
-
Fundamental groups of complements of dual varieties in Grassmannian
slides
Conference on Symplectic Geometry
July 26, 2007
RIMS, Kyoto
-
Non-homeomorphic conjugate complex varieties
slides
6th Polish-Japanese Singularity Theory Working Days
July 12, 2007
Sopot, Poland
-
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
-
Singular K3 surfaces and arithmetic Zariski pairs
Seminar Talk
March 8, 2007
Vietnam National University, Hanoi
-
Lectures: On Zariski -van Kampen theorem
March 6-7, 2007
Vietnam National University, Hanoi
-
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
-
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
-
On arithmetic Zariski pairs in degree 6
Mini-workshop on hyperplane arrangements
December 07, 2006
Hokkaido University
-
Singularities of dual varieties in characteristic 3
slides
International Symposium on singularity theory and its applications
September 07, 2006
Changsha, China
-
Singularities of discriminant varieties in characteristic 2 and 3
slides
Algebraic Geometry in East Asia II
October 13, 2005
Hanoi, Vietnam
-
Singularity theory in positive characteristics
Department of Mathematics, National University of Singapore, Seminar Talk
September 7, 2005
-
Divisibility of certain Chern numbers
5th Polish-Japanese Singularity Theory Working Days
July 19, 2005
Bukowina Tatrzanska, Poland
-
Supersingular K3 surfaces as double covers of a projective plane
Arithmetic and Algebraic Geometry 2004
December 20, 2004
The University of Tokyo
-
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
-
On topological fundamental groups of open algebraic varieties
4th Polish-Japanese Singularity Theory Woking Days
September 3, 2004
Bedlewo, Poland
-
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
-
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
-
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
-
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
-
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
-
Supersingular K3 surfaces
Conference on Algebra-Geometry-Topology
25 November, 2003
Dalat University, Dalat, Vietnam
-
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
-
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
-
Supersingular K3 surfaces
Mathematics of Nonlinear Structure
Joint Symposium between
Seoul National University and
Hokkaido University
October 18, 2003
Seoul National University, Seoul, Korea
-
Supersingular K3 surfaces
3rd Japanese-Polish Singularity Theory Working Days
September 28, 2003
Hokkaido University
-
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
-
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
-
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
-
Supersingular K3 surfaces as double covers of the projective plane
Department of Mathematics, National University of Singapore, Seminar Talk
March 26, 2003
-
Rational double points on supersingular K3 surfaces
神戸大学CAセミナー
2002年11月19日
-
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
-
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
-
Rational double points on K3 surfaces
Singularites franco-japonaises
September 12, 2002
CIRM, Luminy, France
-
Elliptic K3 surfaces
長沙電力学院, 湖南省, 中国
June 6, 2002
-
Variations of Zariski-van Kampen Theorem
The fundamental group of algebraic varieties, Hokkaido University
July 25, 2002
-
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
-
Vanishing cycles and the generalized Hodge conjecture
Polish-Japanese Singularity Theory Working Days
September 20-27 , 2001
The Mathematical Conference Center, Bedlewo, Poland
-
Equisingular families of plane curves with many connected components
Algebraic Geometry in East Asia
August 9, 2001
International Institute for Advanced Studies (Kyoto)
-
The fundamental groups of algebraic fiber spaces
Singularities and Related Subjects, Second Workshop In Changchun,
July 8-10, 2001
Northeast Normal University, Changchun, China
-
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
-
Lectures on Zariski-van Kampen Theorem
08-21 May, 2001
Dalat University,
Vietnam
-
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
-
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
-
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
-
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
-
On elliptic K3 surfaces
The mini workshop on explicit moduli in Sapporo,
August 01-04, 2000
Hokkaido University
-
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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