Yasui Kouichi 安井弘一

… Alternative Names

YASUI Koichi 安井弘一

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Researcher Number	70547009
Other IDs
Affiliation (Current)	2025: 大阪大学, 大学院情報科学研究科, 准教授
Affiliation (based on the past Project Information) *help	2022 – 2023: 大阪大学, 大学院情報科学研究科, 准教授 2017 – 2021: 大阪大学, 情報科学研究科, 准教授 2016: 広島大学, 理学研究科, 助教 2012 – 2016: 広島大学, 理学(系)研究科(研究院), 助教 2014 – 2015: 広島大学, 大学院理学研究科, 助教 … More 2011 – 2012: 広島大学, 大学院・理学研究科, 助教 2010: 京都大学, 数理解析研究所, 研究員 2009: Kyoto University, 数理解析研究所, 特定研究員(グローバルCOE) Less
Review Section/Research Field	Principal Investigator Geometry / Basic Section 11020:Geometry-related Except Principal Investigator Geometry / Basic Section 11020:Geometry-related
Keywords	Principal Investigator 微分構造 / コルク / トポロジー / 4次元多様体 / 結び目 / ハンドル分解 / ４次元多様体 / ハンドル体 / 接触構造 / 種数関数 … More / Stein 多様体 / Bauer-Furuta 不変量 / Stein構造 / 随伴不等式 / 安定化 / Seiberg-Witten 不変量 / 単純型予想 / ４次元トポロジー / 4次元トポロジー / Stein 構造 / Lefschetz fibration / レフシェッツファイブレーション / Stein filling / プラグ / Stein多様体 / Kirby図式 / plug / cork … More Except Principal Investigator ４次元トポロジー / カンドル / 曲面結び目 / グラフィクス / ４次元 / トポロジー / ブレイド / 仮想結び目 / 結び目理論 / 曲面ブレイド / 低次元トポロジー / 崩壊理論 / 薄滑解析（Nonsmooth Analysis） / リーマン幾何 / 沈め込み / 薄滑解析（Nonsmooth analysis） / 微分球面定理 / 微分構造 / 折り紙 / 球面定理 / 異種構造 / 大域リーマン幾何学 / 薄滑解析 / 最小跡 / Groveと塩濱の臨界点理論 / Reebの球面定理 / 異種球面 / リプシッツ写像 / 薄滑解析(Nonsmooth Analysis) / 大域リーマン幾何 / １ハンドル / マーカー付きグラフ図式 / はめ込み曲面絡み目 / 楕円的モンテシノス絡み目 / 解消トンネル / 2橋球面 / free period / McShaneの等式 / small cancellation theory / 2橋結び目 / Heckoid orbifold / Heegaard decomposition / Heckoid group / モノドロミー群 / ２橋結び目 / 写像類群 / cusp shape / McShane's identity / Heegaard splitting / bridge decomposition / 2-bridge link / 2-bridge knot Less

４次元多様体の微分構造と結び目への応用Principal Investigator
- Principal Investigator
  
  安井弘一
- Project Period (FY)
  2023 – 2025
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 11020:Geometry-related
- Research Institution
  Osaka University
Smooth structures of 4-manifolds and knotsPrincipal Investigator
- Principal Investigator
  
  Yasui Kouichi
- Project Period (FY)
  2019 – 2023
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 11020:Geometry-related
- Research Institution
  Osaka University
Research on 4-dimensional topology from the viewpoint of graphics and quandle theory
- Principal Investigator
  
  Kamada Seiichi
- Project Period (FY)
  2019 – 2023
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 11020:Geometry-related
- Research Institution
  Osaka University
The application of nonsmooth analysis to the collapsing theory and exotic structure
- Principal Investigator
  
  KONDO Kei
- Project Period (FY)
  2017 – 2021
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Okayama University
  Yamaguchi University
Handle decompositions and smooth structures of 4-manifoldsPrincipal Investigator
- Principal Investigator
  
  YASUI Kouichi
- Project Period (FY)
  2016 – 2018
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
  Hiroshima University
Research on 4-dimensional topology from the viewpoint of graphics and quandle theory
- Principal Investigator
  
  KAMADA SEIICHI
- Project Period (FY)
  2014 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Osaka City University
Research on smooth structures on 4-manifolds using handle decompositionsPrincipal Investigator
- Principal Investigator
  
  YASUI Kouichi
- Project Period (FY)
  2013 – 2015
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Geometry
- Research Institution
  Hiroshima University
Handle decompositions and smooth structures on 4-manifoldPrincipal Investigator
- Principal Investigator
  
  YASUI Kouichi
- Project Period (FY)
  2011 – 2012
- Research Category
  
  Grant-in-Aid for Research Activity Start-up
- Research Field
  
  Geometry
- Research Institution
  Hiroshima University
Geometric structure and combinatorial structure of 3-dimensional manifolds
- Principal Investigator
  
  SAKUMA MAKOTO
- Project Period (FY)
  2010 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Hiroshima University
カービー図式を用いた4次元多様体の微分構造の研究Principal Investigator
- Principal Investigator
  
  安井弘一
- Project Period (FY)
  2009 – 2010
- Research Category
  
  Grant-in-Aid for Research Activity Start-up
- Research Field
  
  Geometry
- Research Institution
  Kyoto University

[Journal Article] The simple type conjecture for mod 2 Seiberg-Witten invariants2022
- Author(s)
  Kato Tsuyoshi、Nakamura Nobuhiro、Yasui Kouichi
- Journal Title
  
  Journal of the European Mathematical Society
  
  Volume: － Issue: 12 Pages: 4869-4877
- DOI
  10.4171/jems/1297
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19K03506, KAKENHI-PROJECT-19K03491, KAKENHI-PROJECT-23K22394
[Journal Article] Geometrically simply connected 4-manifolds and stable cohomotopy Seiberg-Witten invariants2020
- Author(s)
  Kouichi Yasui
- Journal Title
  
  Geometry & Topology
  
  Volume: 印刷中
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-16K17593
[Journal Article] Geometrically simply connected 4-manifolds and stable cohomotopy Seiberg-Witten invariants2020
- Author(s)
  Kouichi Yasui
- Journal Title
  
  Geometry & Topology
  
  Volume: -
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17K05220
[Journal Article] Nonexistence of twists and surgeries generating exotic 4-manifolds2019
- Author(s)
  Kouichi Yasui
- Journal Title
  
  Transactions of the American Mathematical Society
  
  Volume: 印刷中
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-16K17593
[Journal Article] Nonexistence of twists and surgeries generating exotic 4-manifolds2019
- Author(s)
  Kouichi Yasui
- Journal Title
  
  Transactions of the American Mathematical Society
  
  Volume: -
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17K05220
[Journal Article] On twists and surgeries generating exotic smooth structures2018
- Author(s)
  Kouichi Yasui
- Journal Title
  
  RIMS Kokyuroku
  
  Volume: 2099 Pages: 30-35
- Open Access
- Data Source
  KAKENHI-PROJECT-17K05220
[Journal Article] On twists and surgeries generating exotic smooth structures2018
- Author(s)
  Kouichi Yasui
- Journal Title
  
  RIMS Kokyuroku
  
  Volume: 2099 Pages: 30-35
- Open Access
- Data Source
  KAKENHI-PROJECT-16K17593
[Journal Article] Calabi-Yau Caps, Uniruled Caps and Symplectic Fillings2017
- Author(s)
  Tian-Jun Li, Cheuk Yu Mak and Kouichi Yasui
- Journal Title
  
  Proceedings of the London Mathematical Society
  
  Volume: 114 Issue: 1 Pages: 159-187
- DOI
  10.1112/plms.12007
- Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17593
[Journal Article] Maximal Thurston-Bennequin number and reducible Legendrian surgery2016
- Author(s)
  Kouichi Yasui
- Journal Title
  
  Compositio Mathematica
  
  Volume: 印刷中
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-25800048
[Journal Article] Contact 5-manifolds admitting open books with exotic pages2016
- Author(s)
  Selman Akbulut and Kouichi Yasui
- Journal Title
  
  Mathematical Research Letters
  
  Volume: 印刷中
- Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25800048
[Journal Article] Nonexistence of Stein structures on 4-manifolds and maximal Thurston-Bennequin numbers2016
- Author(s)
  Kouichi Yasui
- Journal Title
  
  Journal of Symplectic Geometry
  
  Volume: 印刷中
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-25800048
[Journal Article] Infinitely many small exotic Stein fillings2014
- Author(s)
  Selman Akbulut and Kouichi Yasui
- Journal Title
  
  Journal of Symplectic Geometry
  
  Volume: 4 Issue: 4 Pages: 673-684
- DOI
  10.4310/jsg.2014.v12.n4.a2
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25800048
[Journal Article] Cork twisting exotic Stein 4-manifolds2013
- Author(s)
  Selman Akbulut and Kouichi Yasui
- Journal Title
  
  Journal of Differential Geometry
  
  Volume: 93 Pages: 1-36
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23840027
[Journal Article] Gluck twisting 4-manifolds with odd intersection form2013
- Author(s)
  Selman Akbulut and Kouichi Yasui
- Journal Title
  
  Mathematical Research Letters
  
  Volume: 02 Issue: 2 Pages: 385-389
- DOI
  10.4310/mrl.2013.v20.n2.a13
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25800048
[Journal Article] Cork twisting exotic Stein 4-manifolds2013
- Author(s)
  Selman Akbulut and Kouichi Yasui
- Journal Title
  
  Journal of Differential Geometry 93
  
  Volume: no. 1 Pages: 1-36
- URL
  http://projecteuclid.org/DPubS?service=UI&version=1.0&verb=Display&page=toc&handle=euclid.jdg/1357141504
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23840027
[Journal Article] Stein 4-manifolds and corks2012
- Author(s)
  Selman Akbulut and Kouichi Yasui
- Journal Title
  
  Journal of Gokova Geometry Topology
  
  Volume: 6 Pages: 58-79
- URL
  http://gokovagt.org/journal/2012/index.html
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Genus functions of 4-manifolds and their applications2024
- Author(s)
  Kouichi Yasui
- Organizer
  Differential Topology '24 Cork, exotic structure, concordance
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K03090
[Presentation] Genus functions of 4-manifolds and their applications2024
- Author(s)
  Kouichi Yasui
- Organizer
  Differential Topology '24 Cork, exotic structure, concordance
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01788
[Presentation] Genus functions of 4-manifolds and their applications2024
- Author(s)
  Kouichi Yasui
- Organizer
  Differential Topology '24 Cork, exotic structure, concordance
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Exotic 4-manifolds and genus functions2023
- Author(s)
  安井弘一
- Organizer
  研究集会「４次元トポロジー」
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Sums of 4-manifolds, genus functions and their applications2023
- Author(s)
  Kouichi Yasui
- Organizer
  Gauge Theory in Kyoto
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Exotic 4-manifolds and genus functions2023
- Author(s)
  安井弘一
- Organizer
  研究集会「４次元トポロジー」
- Data Source
  KAKENHI-PROJECT-23K03090
[Presentation] ４次元多様体の微分構造と種数関数2023
- Author(s)
  安井弘一
- Organizer
  日本数学会 2023 年度秋季総合分科会
- Invited
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] ４次元多様体の微分構造と種数関数2023
- Author(s)
  安井弘一
- Organizer
  日本数学会 2023 年度秋季総合分科会
- Invited
- Data Source
  KAKENHI-PROJECT-19H01788
[Presentation] ４次元多様体の微分構造と種数関数2023
- Author(s)
  安井弘一
- Organizer
  日本数学会 2023 年度秋季総合分科会
- Invited
- Data Source
  KAKENHI-PROJECT-23K03090
[Presentation] Sums of 4-manifolds, genus functions and their applications2023
- Author(s)
  Kouichi Yasui
- Organizer
  Gauge Theory in Kyoto
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01788
[Presentation] Sums of 4-manifolds, genus functions and their applications2022
- Author(s)
  Kouichi Yasui
- Organizer
  4-Manifolds: From Above and Below
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Sums of 4-manifolds, genus functions and their applications2022
- Author(s)
  Kouichi Yasui
- Organizer
  4-Manifolds: From Above and Below
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01788
[Presentation] Sums of 4-manifolds, genus functions and their applications2022
- Author(s)
  安井弘一
- Organizer
  九州大学金曜トポロジーセミナー
- Invited
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Stably exotic pairs of closed 4-manifolds and their applications2021
- Author(s)
  安井弘一
- Organizer
  研究集会「４次元トポロジー」
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Stably exotic pairs of closed 4-manifolds and their applications2021
- Author(s)
  安井弘一
- Organizer
  研究集会「４次元トポロジー」
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] Stably exotic pairs of closed 4-manifolds and their applications2021
- Author(s)
  安井弘一
- Organizer
  研究集会「４次元トポロジー」
- Data Source
  KAKENHI-PROJECT-19H01788
[Presentation] Minimal genus functions and constraints on 4-manifolds2020
- Author(s)
  Kouichi Yasui
- Organizer
  International Workshop on 4-Manifold Theory and Gauge Theory
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Embedded surfaces and the simple type conjecture2020
- Author(s)
  安井弘一
- Organizer
  研究集会「４次元トポロジー」
- Data Source
  KAKENHI-PROJECT-19H01788
[Presentation] Embedded surfaces and the simple type conjecture2020
- Author(s)
  安井弘一
- Organizer
  研究集会「４次元トポロジー」、大阪大学（オンライン）
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] Minimal genus functions and constraints on 4-manifolds2020
- Author(s)
  Kouichi Yasui
- Organizer
  International Workshop on 4-Manifold Theory and Gauge Theory
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] Minimal genus functions and constraints on 4-manifolds2020
- Author(s)
  Kouichi Yasui
- Organizer
  International Workshop on 4-Manifold Theory and Gauge Theory
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01788
[Presentation] Stably exotic 4-manifolds2020
- Author(s)
  安井　弘一
- Organizer
  4-Dimensional Topology and Gauge Theory
- Invited
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Embedded surfaces and the simple type conjecture2020
- Author(s)
  安井弘一
- Organizer
  研究集会「４次元トポロジー」
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] 4 次元多様体の微分構造と幾何学的単連結性2019
- Author(s)
  安井　弘一
- Organizer
  広島大学談話会
- Invited
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Minimal genus functions and smooth structures of 4-manifolds2019
- Author(s)
  Kouichi Yasui
- Organizer
  Workshop on Lefschetz Pencils and Low dimensional Topology
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01788
[Presentation] Minimal genus functions and smooth structures of 4-manifolds2019
- Author(s)
  安井弘一
- Organizer
  微分トポロジー19 ～4次元多様体に埋め込まれた曲面とその手術～
- Invited
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] Nonexistence of twists and surgeries generating exotic 4-manifolds2019
- Author(s)
  Kouichi Yasui
- Organizer
  Workshop on low-dimensional topology
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Nonexistence of twists and surgeries generating exotic 4-manifolds2019
- Author(s)
  Kouichi Yasui
- Organizer
  Workshop on low-dimensional topology (Korea Institute for Advanced Study, Korea, 5月1日)
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] Minimal genus functions and smooth structures of 4-manifolds2019
- Author(s)
  Kouichi Yasui
- Organizer
  Workshop on Lefschetz Pencils and Low dimensional Topology
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] 4次元多様体の微分構造と幾何学的単連結性2019
- Author(s)
  安井弘一
- Organizer
  広島大学談話会（広島大学，6月18日）
- Invited
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] Minimal genus functions and smooth structures of 4-manifolds2019
- Author(s)
  Kouichi Yasui
- Organizer
  Workshop on low-dimensional topology (Korea Institute for Advanced Study, Korea, 5月1日)
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] Minimal genus functions and smooth structures of 4-manifolds2019
- Author(s)
  Kouichi Yasui
- Organizer
  Workshop on low-dimensional topology
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Smooth 4-manifolds and geometric simple connectivity2019
- Author(s)
  安井弘一
- Organizer
  京都大学数学教室談話会（京都大学，10月30日）
- Invited
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] Nonexistence of twists and surgeries generating exotic 4-manifolds2019
- Author(s)
  Kouichi Yasui
- Organizer
  Workshop on low-dimensional topology
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01788
[Presentation] Smooth 4-manifolds and geometric simple connectivity2019
- Author(s)
  安井　弘一
- Organizer
  京都大学数学教室談話会
- Invited
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Stably exotic 4-manifolds2019
- Author(s)
  安井　弘一
- Organizer
  研究集会「４次元トポロジー」
- Data Source
  KAKENHI-PROJECT-19K03491
[Presentation] Minimal genus functions and smooth structures of 4-manifolds2019
- Author(s)
  Kouichi Yasui
- Organizer
  Workshop on low-dimensional topology
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01788
[Presentation] Minimal genus functions and smooth structures of 4-manifolds2019
- Author(s)
  Kouichi Yasui
- Organizer
  Workshop on Lefschetz Pencils and Low dimensional Topology (Hokkaido University，6月2日)
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] Minimal genus functions and smooth structures of 4-manifolds2018
- Author(s)
  Kouichi Yasui
- Organizer
  Knotted surfaces in 4-manifolds
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] Corks and exotic 4-manifolds represented by framed knots2018
- Author(s)
  Kouichi Yasui
- Organizer
  The topology and geometry of low-dimensional manifolds: a celebration of the mathematics of Bob Gompf
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] Nonexistence of twists and surgeries generating exotic 4-manifolds2018
- Author(s)
  安井弘一
- Organizer
  Intelligence of Low-dimensional Topology
- Invited
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] Nonexistence of twists and surgeries generating exotic 4-manifolds2018
- Author(s)
  安井弘一
- Organizer
  九州大学金曜トポロジーセミナー
- Invited
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] Geometrically simply connected 4-manifolds and stable cohomotopy Seiberg-Witten invariants2018
- Author(s)
  Kouichi Yasui
- Organizer
  Four Dimensional Topology
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] Exotic Stein fillings of contact 3-manifolds2017
- Author(s)
  Kouichi Yasui
- Organizer
  The Third Pacific Rim Mathematical Association Congress
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26287013
[Presentation] Nonexistence of twists and surgeries generating exotic 4-manifolds2017
- Author(s)
  安井弘一
- Organizer
  日本数学会2017年度秋季総合分科会
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] Nonexistence of twists and surgeries generating exotic 4-manifolds2017
- Author(s)
  Kouichi Yasui
- Organizer
  Low Dimensional Topology and Gauge Theory
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] Exotic Stein fillings of contact 3-manifolds2017
- Author(s)
  Kouichi Yasui
- Organizer
  The Third Pacific Rim Mathematical Association Congress
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] 4次元多様体の微分構造とコルク2017
- Author(s)
  安井弘一
- Organizer
  大阪大学談話会
- Invited
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] Contact 5-manifolds and smooth structures on Stein 4-manifolds2016
- Author(s)
  安井弘一
- Organizer
  日本数学会2016年度秋季総合分科会
- Place of Presentation
  関西大学
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] ４次元シュタイン多様体と結び目2016
- Author(s)
  安井弘一
- Organizer
  第63回トポロジーシンポジウム
- Place of Presentation
  神戸大学
- Invited
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] Contact 5-manifolds admitting open books with exotic Stein page2016
- Author(s)
  安井弘一
- Organizer
  接触構造，特異点，微分方程式及びその周辺
- Place of Presentation
  金沢大学
- Year and Date
  2016-01-23
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Corks, exotic 4-manifolds and knot concordance2016
- Author(s)
  安井弘一
- Organizer
  Branched Coverings, Degenerations, and Related Topics 2016
- Place of Presentation
  広島大学
- Year and Date
  2016-03-10
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Nonexistence of Stein structures on 4-manifolds and maximal Thurston-Bennequin numbers2016
- Author(s)
  安井弘一
- Organizer
  日本数学会2016年度年会
- Place of Presentation
  筑波大学
- Year and Date
  2016-03-18
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Nonexistence of twists and surgeries generating exotic 4-manifolds2016
- Author(s)
  安井弘一
- Organizer
  研究集会「４次元トポロジー」
- Place of Presentation
  大阪市立大学
- Data Source
  KAKENHI-PROJECT-16K17593
[Presentation] Maximal Thurston-Bennequin number and reducible Legendrian surgery2016
- Author(s)
  安井弘一
- Organizer
  日本数学会2016年度年会
- Place of Presentation
  筑波大学
- Year and Date
  2016-03-18
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Stein ４次元多様体の微分構造と５次元多様体の接触構造2016
- Author(s)
  安井弘一
- Organizer
  微分トポロジー１６
- Place of Presentation
  筑波大学
- Year and Date
  2016-03-22
- Invited
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Corks, exotic 4-manifolds and knot concordance2015
- Author(s)
  安井弘一
- Organizer
  研究集会「４次元トポロジー」
- Place of Presentation
  大阪市立大学
- Year and Date
  2015-11-21
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Partial twists and exotic Stein fillings2015
- Author(s)
  安井弘一
- Organizer
  微分トポロジー１５～微分トポロジーの過去・現在・未来～
- Place of Presentation
  京都大学
- Year and Date
  2015-03-25
- Invited
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Corks, exotic 4-manifolds and knot concordance2015
- Author(s)
  安井弘一
- Organizer
  Friday Seminar on Knot Theory
- Place of Presentation
  大阪市立大学
- Year and Date
  2015-06-26
- Invited
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Corks, exotic 4-manifolds and knot concordance2015
- Author(s)
  安井弘一
- Organizer
  日本数学会2015年度秋季総合分科会
- Place of Presentation
  京都産業大学
- Year and Date
  2015-09-15
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Exotic 4-manifolds and non-concordant knots with the same 0-surgery2015
- Author(s)
  安井弘一
- Organizer
  広島大学トポロジー・幾何セミナー
- Place of Presentation
  広島大学
- Year and Date
  2015-04-21
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Contact 5-manifolds admitting open books with exotic Stein pages2015
- Author(s)
  Selman Akbulut, 安井弘一
- Organizer
  日本数学会2015年度秋季総合分科会
- Place of Presentation
  京都産業大学
- Year and Date
  2015-09-15
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Partial twists and exotic Stein fillings2014
- Author(s)
  安井弘一
- Organizer
  幾何学コロキウム
- Place of Presentation
  北海道大学
- Year and Date
  2014-06-13
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Partial twists and exotic Stein fillings2014
- Author(s)
  Kouichi Yasui
- Organizer
  Topology Seminar
- Place of Presentation
  Kansas State University　（アメリカ）
- Year and Date
  2014-11-14
- Invited
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Partial twists and exotic Stein fillings2014
- Author(s)
  安井弘一
- Organizer
  広島大学トポロジー・幾何セミナー
- Place of Presentation
  広島大学
- Year and Date
  2014-06-24
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Partial twists and exotic Stein fillings2014
- Author(s)
  Kouichi Yasui
- Organizer
  Topology Seminar
- Place of Presentation
  Michigan State University （アメリカ）
- Year and Date
  2014-10-06
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Partial twists and exotic Stein fillings2014
- Author(s)
  安井弘一
- Organizer
  東工大トポロジーセミナー
- Place of Presentation
  東京工業大学
- Year and Date
  2014-07-09
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Stein 構造の4 次元多様体への応用についてII2014
- Author(s)
  安井弘一
- Organizer
  接触構造、特異点、微分方程式及びその周辺
- Place of Presentation
  高知市文化プラザかるぽーと
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Partial twists and exotic Stein fillings2014
- Author(s)
  安井弘一
- Organizer
  日本数学会2014年度年会
- Place of Presentation
  学習院大学
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Stein 構造の4 次元多様体への応用についてI2014
- Author(s)
  安井弘一
- Organizer
  接触構造、特異点、微分方程式及びその周辺
- Place of Presentation
  高知市文化プラザかるぽーと
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Corks and exotic smooth structures on 4-manifolds2014
- Author(s)
  Kouichi Yasui
- Organizer
  Colloquium
- Place of Presentation
  Kansas State University　（アメリカ）
- Year and Date
  2014-11-13
- Invited
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Partial twists and exotic Stein fillings2014
- Author(s)
  Kouichi Yasui
- Organizer
  Differential Geometry and Symplectic Topology Seminar
- Place of Presentation
  University of Minnesota　（アメリカ）
- Year and Date
  2014-09-25
- Invited
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Partial twists and exotic Stein fillings2014
- Author(s)
  Kouichi Yasui
- Organizer
  Workshop on Topology and Invariants of 4-Manifolds
- Place of Presentation
  Simons Center for Geometry and Physics, Stony Brook University （アメリカ）
- Year and Date
  2014-08-26
- Invited
- Data Source
  KAKENHI-PROJECT-25800048
[Presentation] Corks and exotic 4-manifolds2013
- Author(s)
  安井弘一
- Organizer
  日本数学会 2013 年度年会(特別講演)
- Place of Presentation
  京都大学
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] exotic Stein fillings and exotic S^2-links2013
- Author(s)
  Kouichi Yasui, Nuclei
- Organizer
  FRG Topology Workshop 2013 Topology and Invariants of Smooth 4-manifolds
- Place of Presentation
  The Savoy Hotel, Miami (アメリカ)
- Year and Date
  2013-03-14
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Nuclei, exotic Stein fillings and exotic S^2-links2013
- Author(s)
  Kouichi Yasui
- Organizer
  FRG Topology Workshop 2013 Topology and Invariants of Smooth 4-manifolds
- Place of Presentation
  The Savoy Hotel, Miami (アメリカ)
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Corks and exotic 4-manifolds2013
- Author(s)
  安井　弘一
- Organizer
  日本数学会2013年度年会
- Place of Presentation
  京都大学
- Invited
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Corks and exotic 4-manifolds2012
- Author(s)
  Kouichi Yasui
- Organizer
  Conference on Holomorphic Curves and Low Dimensional Topology
- Place of Presentation
  Stanford University (アメリカ)
- Year and Date
  2012-08-09
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Gluck twisting 4-manifolds with odd intersection form2012
- Author(s)
  Selman Akbulut, 安井　弘一　（発表者：安井弘一）
- Organizer
  日本数学会2012年度秋季総合分科会
- Place of Presentation
  九州大学
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Cork twisting exotic Stein 4-manifolds2012
- Author(s)
  Kouichi Yasui
- Organizer
  Invariants in Low-Dimensional Topology and Knot Theory
- Place of Presentation
  The Mathematisches Forschungsinstitut Oberwolfach （ドイツ）
- Invited
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Cork twisting exotic Stein 4-manifolds2012
- Author(s)
  Kouichi Yasui
- Organizer
  Invariants in Low-DimensionalTopologyandKnotTheory
- Place of Presentation
  the Mathematisches Forschungsinstitut Oberwolfach (ドイツ)
- Year and Date
  2012-06-05
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Nuclei and exotic 4-manifolds2012
- Author(s)
  Kouichi Yasui
- Organizer
  The 8th East Asian School of Knots and Related Topics
- Place of Presentation
  Daejeon,韓国
- Year and Date
  2012-01-09
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Exotic S^2-knots and Gluck twists2012
- Author(s)
  安井　弘一
- Organizer
  研究集会「４次元トポロジー」
- Place of Presentation
  広島大学
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Nuclei and exotic 4-manifolds2012
- Author(s)
  Kouichi Yasui
- Organizer
  Geometry/Topology Focus Research Group Workshop
- Place of Presentation
  Miami,アメリカ合衆国
- Year and Date
  2012-03-14
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Nuclei and exotic 4-manifolds2012
- Author(s)
  Kouichi Yasui
- Organizer
  The 8th East Asian School of Knots and Related Topics
- Place of Presentation
  Korea Advanced Institute of Science and Technology (韓国)
- Year and Date
  2012-01-09
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Nuclei and exotic 4-manifolds2012
- Author(s)
  Kouichi Yasui
- Organizer
  FRG Workshop 2012 Topology and Invariants of Smooth 4-manifolds
- Place of Presentation
  The Mutiny Hotel, Miami (アメリカ)
- Year and Date
  2012-03-14
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Exotic S^2-knots and Gluck twists2012
- Author(s)
  安井弘一
- Organizer
  研究集会「4次元トポロジー」
- Place of Presentation
  広島大学
- Year and Date
  2012-11-15
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Gluck twisting 4-manifolds with odd intersection form2012
- Author(s)
  安井弘一
- Organizer
  日本数学会 2012年度秋季総合分科会(一般講演)
- Place of Presentation
  九州大学
- Year and Date
  2012-09-18
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Cork twisting exoticStein 4-manifolds2011
- Author(s)
  安井弘一
- Organizer
  日本数学会 2011 年度秋季総合分科会(一般講演)
- Place of Presentation
  信州大学
- Year and Date
  2011-09-28
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] 4 次元多様体のコルクとその応用2011
- Author(s)
  安井弘一
- Organizer
  広島大学談話会
- Place of Presentation
  広島大学
- Year and Date
  2011-06-14
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Cork twisting exotic Stein 4-manifolds2011
- Author(s)
  Kouichi Yasui
- Organizer
  Eighteenth Gokova Geometry/Topology Conference
- Place of Presentation
  Gokova,トルコ(招待講演)
- Year and Date
  2011-06-02
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] 4 次元多様体の微分構造と閉曲面の種数2011
- Author(s)
  安井弘一
- Organizer
  近畿大学数学講演会
- Place of Presentation
  近畿大学
- Year and Date
  2011-12-01
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Cork twisting exotic Stein 4-manifolds2011
- Author(s)
  Kouichi Yasui
- Organizer
  Eighteenth Gokova Geometry/Topology Conference
- Place of Presentation
  Gokova (トルコ)
- Year and Date
  2011-06-02
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Cork twisting exoticStein 4-manifolds2011
- Author(s)
  安井弘一
- Organizer
  阪大トポロジーセミナー
- Place of Presentation
  大阪大学
- Year and Date
  2011-08-02
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Cork twisting exoticStein 4-manifolds2011
- Author(s)
  安井弘一
- Organizer
  広島大学トポロジー幾何セミナー
- Place of Presentation
  広島大学
- Year and Date
  2011-04-26
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Exotic 4-manifolds with boundary, minimalgeneraandSteinfillable3-manifolds2011
- Author(s)
  安井弘一
- Organizer
  研究集会「4次元トポロジー」
- Place of Presentation
  広島大学
- Year and Date
  2011-11-08
- Data Source
  KAKENHI-PROJECT-23840027
[Presentation] Corks, plugs and exotic 4-manifolds2010
- Author(s)
  安井弘一
- Organizer
  Intensive Lectures on Lefschetz fibration
- Place of Presentation
  KIAS (韓国)
- Data Source
  KAKENHI-PROJECT-21840033
[Presentation] Corks, plugs and exotic 4-manifolds2009
- Author(s)
  安井弘一
- Organizer
  第56回トポロジーシンポジウム
- Place of Presentation
  北海道大学 (北海道)
- Year and Date
  2009-08-09
- Data Source
  KAKENHI-PROJECT-21840033
[Presentation] Corks, plugs and exotic 4-manifolds2009
- Author(s)
  安井弘一
- Organizer
  Sixteenth Gokova Geometry/Topology Conference
- Place of Presentation
  Gokova (トルコ)
- Year and Date
  2009-05-27
- Data Source
  KAKENHI-PROJECT-21840033

1. KAMADA Seiichi (60254380)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
2. 河内明夫 (00112524)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
3. 金信泰造 (00152819)

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4. 大槻知忠 (50223871)

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5. 遠藤久顕 (20323777)

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6. 佐藤進 (90345009)

# of Collaborated Projects: 2 results

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7. 大城佳奈子 (90609091)

# of Collaborated Projects: 2 results

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8. SAKUMA MAKOTO (30178602)

# of Collaborated Projects: 1 results

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9. SHIMADA Ichiro (10235616)

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10. DOI Hideo (72542810)

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11. HIRANOUCHI Toshiro (59321203)

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12. KONO Masaharu (40170203)

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13. NIKKUNI Ryo (00401878)

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14. AKIYOSHI Hirotaka (80397611)

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15. HIRASAWA Mikami (00337908)

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16. OHSHIKA Ken'ICHI (70183225)

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17. WADA Masaaki (80192821)

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18. MIYACHI Hideki (40385480)

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19. KIN Eiko (80378554)

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20. KOBAYASHI Tsuyoshi (00186751)

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21. YAMASHITA Yasushi (70239987)

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22. MORIMOTO Kanji (90200443)

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23. NAKANISHI Toshihiro (00172354)

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24. KOMORI Yohei (70264794)

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25. SUGAWA Toshiyuki (30235858)

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26. SHACKLETON Kenneth (70536870)

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27. KONDO Kei (70736123)

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28. 土井英雄 (50197993)

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29. 平之内俊郎 (30532551)

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30. 内藤博夫 (10127772)

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31. 中内伸光 (50180237)

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32. 早野健太 (20722606)

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33. NAKAMURA Nobuhiro

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Yasui Kouichi 安井 弘一

YASUI Koichi 安井 弘一

Research Projects

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Co-Researchers

４次元多様体の微分構造と結び目への応用Principal Investigator

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Smooth structures of 4-manifolds and knotsPrincipal Investigator

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Research on 4-dimensional topology from the viewpoint of graphics and quandle theory

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The application of nonsmooth analysis to the collapsing theory and exotic structure

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Handle decompositions and smooth structures of 4-manifoldsPrincipal Investigator

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Research on 4-dimensional topology from the viewpoint of graphics and quandle theory

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Research on smooth structures on 4-manifolds using handle decompositionsPrincipal Investigator

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Handle decompositions and smooth structures on 4-manifoldPrincipal Investigator

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Geometric structure and combinatorial structure of 3-dimensional manifolds

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カービー図式を用いた4次元多様体の微分構造の研究Principal Investigator

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[Journal Article] The simple type conjecture for mod 2 Seiberg-Witten invariants2022

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[Journal Article] Geometrically simply connected 4-manifolds and stable cohomotopy Seiberg-Witten invariants2020

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[Journal Article] Geometrically simply connected 4-manifolds and stable cohomotopy Seiberg-Witten invariants2020

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[Journal Article] Nonexistence of twists and surgeries generating exotic 4-manifolds2019

Author(s)

Yasui Kouichi 安井弘一

YASUI Koichi 安井弘一