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Irie, Kei

Research Institute for Mathematical Sciences (RIMS) Associate Professor

Irie, Kei
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    Last Updated :2025/04/23

    Basic Information

    Affiliated programs (koza)

    • Graduate School of Science, 数学・数理解析専攻 数理解析基礎講座, 准教授

    Academic Degree

    • 博士(理学)(京都大学)
    • 修士(理学)(京都大学)

    ID,URL

    researchmap URL

    list
      Last Updated :2025/04/23

      Research

      Research Topics, Overview of the research

      • Research Topics

        Symplectic Geometry
      • Overview of the research

        Kei Irie is working on symplectic geometry and related topics. In particular, he studies symplectic capacities, with emphasis on applications to the study of periodic orbits of Hamiltonian systems.

      Research Areas

      • Natural sciences, Geometry

      Papers

      • Strong closing property of contact forms and action selecting functors
        Kei Irie
        Journal of Fixed Point Theory and Applications, 09 Apr. 2024, Peer-reviewed
      • Capacities of billiard tables and $$S^1$$-equivariant loop space homology
        Kei Irie
        Journal of Fixed Point Theory and Applications, Jun. 2022, Peer-reviewed
      • Equidistributed periodic orbits of $C^\infty$-generic three-dimensional Reeb flows
        Kei Irie
        Journal of Symplectic Geometry, 2021, Peer-reviewed
      • Remarks about the C∞-closing lemma for 3-dimensional Reeb flows
        Kei Irie
        Kyoto Journal of Mathematics, 01 Jun. 2021, Peer-reviewed
      • Chain level loop bracket and pseudo‐holomorphic disks
        Kei Irie
        Journal of Topology, Jun. 2020, Peer-reviewed
      • A Chain Level Batalin–Vilkovisky Structure in String Topology Via de Rham Chains
        Kei Irie
        International Mathematics Research Notices, 03 Aug. 2018, Peer-reviewed
      • Density of minimal hypersurfaces for generic metrics
        Kei Irie; Fernando Marques; André Neves
        Annals of Mathematics, 01 May 2018, Peer-reviewed
      • A C ∞ closing lemma for Hamiltonian diffeomorphisms of closed surfaces
        Masayuki Asaoka; Kei Irie
        Geometric and Functional Analysis, Oct. 2016, Peer-reviewed
      • DENSE EXISTENCE OF PERIODIC REEB ORBITS AND ECH SPECTRAL INVARIANTS
        Kei Irie
        JOURNAL OF MODERN DYNAMICS, 2015, Peer-reviewed
      • Periodic billiard trajectories and Morse theory on loop spaces
        Kei Irie
        COMMENTARII MATHEMATICI HELVETICI, 2015, Peer-reviewed
      • SYMPLECTIC HOMOLOGY OF DISC COTANGENT BUNDLES OF DOMAINS IN EUCLIDEAN SPACE
        Kei Irie
        JOURNAL OF SYMPLECTIC GEOMETRY, Sep. 2014, Peer-reviewed
      • Displacement energy of unit disk cotangent bundles
        Kei Irie
        MATHEMATISCHE ZEITSCHRIFT, Apr. 2014, Peer-reviewed
      • Hofer-Zehnder capacity of unit disk cotangent bundles and the loop product
        Kei Irie
        JOURNAL OF THE EUROPEAN MATHEMATICAL SOCIETY, 2014, Peer-reviewed
      • HANDLE ATTACHING IN WRAPPED FLOER HOMOLOGY AND BRAKE ORBITS IN CLASSICAL HAMILTONIAN SYSTEMS
        Kei Irie
        OSAKA JOURNAL OF MATHEMATICS, Jun. 2013, Peer-reviewed
      • Symplectic capacity and short periodic billiard trajectory
        Kei Irie
        MATHEMATISCHE ZEITSCHRIFT, Dec. 2012, Peer-reviewed
      • VC Dimensions of Principal Component Analysis
        Yohji Akama; Kei Irie; Akitoshi Kawamura; Yasutaka Uwano
        DISCRETE & COMPUTATIONAL GEOMETRY, Oct. 2010, Peer-reviewed

      Presentations

      • Strong closing lemmas for closed geodesics and minimal hypersurfaces
        Kei Irie
        International Congress of Basic Sciences, Jul. 2024, Invited
      • シンプレクティック幾何学と閉補題
        入江慶
        2023年度日本数学会年会, Mar. 2023, Invited
      • S¹-equivariant symplectic capacities of disk cotangent bundles
        Kei Irie
        From Hamiltonian Dynamics to Symplectic Topology, Apr. 2021, Invited
      • Symplectic容量とHamilton力学系の周期軌道
        入江慶
        2019年度日本数学会秋季総合分科会, Sep. 2019, Invited
      • 生成的なRiemann計量における極小閉超曲面の稠密性
        入江慶
        第65回幾何学シンポジウム, Aug. 2018, Invited
      • Chain level string topology, pseudo-holomorphic disks, and Lagrangian submanifolds
        入江慶
        第65回トポロジーシンポジウム, Aug. 2018, Invited
      • A $C^\infty$-closing lemma for three-dimensional Reeb flows via embedded contact homology
        入江慶
        2016年度日本数学会年会, Mar. 2016, Invited
      • Chain level operations in string topology via de Rham chains
        入江慶
        第62回トポロジーシンポジウム, Aug. 2015, Invited
      • Displacement energy of unit cotangent bundles
        入江慶
        第58回トポロジーシンポジウム, Aug. 2011, Invited

      Awards

      • 20 Apr. 2022
        令和4年度 科学技術分野の文部科学大臣表彰 若手科学者賞
      • 日本数学会, 幾何学賞

      External funds: Kakenhi

      • Studies on Floer theory and symplectic, contact structures
        Grant-in-Aid for Scientific Research (A)
        Medium-sized Section 11:Algebra, geometry, and related fields
        Kyoto University
        小野 薫
        From 01 Apr. 2019, To 31 Mar. 2024, Granted
        Floer 理論;シンプレクティック構造;接触構造;正則曲線;ミラー対称性;倉西構造;オービフォルド;倉西構造と仮装基本類・基本鎖;シンプレクティック 構造;symplectic 構造;Lagrange 部分多様体;正則写像;orbifold
      • Symplectic Geometry and Geometry of Loop Spaces
        Grant-in-Aid for Early-Career Scientists
        Basic Section 11020:Geometry-related
        Kyoto University;The University of Tokyo
        入江 慶
        From 01 Apr. 2018, To 31 Mar. 2024, Granted
        Floerホモロジー;ループ空間;シンプレクティック容量;力学系の周期軌道;シンプレクティック幾何;Hamilton力学系;周期軌道;レーブ力学系;擬正則曲線;ストリング・トポロジー
      • Pseudo-holomorphic curves and periodic orbits in Hamiltonian dynamics
        Grant-in-Aid for Young Scientists (B)
        Kyoto University
        Kei Irie
        From 01 Apr. 2013, To 31 Mar. 2017, Project Closed
        擬正則曲線;ハミルトン力学系;周期軌道;ストリング・トポロジー;レーブ力学系;閉補題;埋込接触ホモロジー;ストリングトポロジー;フレアホモロジー
      • Theory of holomorphic curves, the development of Floer theory and studies on contact and symplectic structures
        Grant-in-Aid for Scientific Research (A)
        Medium-sized Section 11:Algebra, geometry, and related fields
        Kyoto University
        小野 薫
        From 01 Apr. 2024, To 31 Mar. 2029, Granted
        シンプレクティック構造;接触構造;Floer 理論;ラグランジュ部分多様体;倉西構造
      list
        Last Updated :2025/04/23

        Education

        Teaching subject(s)

        • From 01 Apr. 2024, To 31 Mar. 2025
          Invitation to Modern Mathematics and Mathematical Sciences
          N114, Spring, Institute for Liberal Arts and Sciences, 2
        • From 01 Apr. 2024, To 31 Mar. 2025
          Special study course (Mathematical Science)
          5140, Year-long, Faculty of Science, 12
        • From 01 Apr. 2024, To 31 Mar. 2025
          Seminar on Geometry and Related Topics c
          1321, Spring, Graduate School of Science, 3
        • From 01 Apr. 2024, To 31 Mar. 2025
          Seminar on Geometry and Related Topics b
          1320, Fall, Graduate School of Science, 3
        • From 01 Apr. 2024, To 31 Mar. 2025
          Seminar on Geometry and Related Topics a
          1319, Spring, Graduate School of Science, 3
        • From 01 Apr. 2024, To 31 Mar. 2025
          Seminar on Geometry and Related Topics d
          1322, Fall, Graduate School of Science, 3
        • From 01 Apr. 2023, To 31 Mar. 2024
          Seminar on Geometry and Related Topics d
          1322, Fall, Graduate School of Science, 3
        • From 01 Apr. 2023, To 31 Mar. 2024
          Seminar on Geometry and Related Topics c
          1321, Spring, Graduate School of Science, 3
        • From 01 Apr. 2023, To 31 Mar. 2024
          Seminar on Geometry and Related Topics b
          1320, Fall, Graduate School of Science, 3
        • From 01 Apr. 2023, To 31 Mar. 2024
          Seminar on Geometry and Related Topics a
          1319, Spring, Graduate School of Science, 3
        • From 01 Apr. 2022, To 31 Mar. 2023
          Seminar on Geometry and Related Topics c
          1321, Spring, Graduate School of Science, 3
        • From 01 Apr. 2022, To 31 Mar. 2023
          Seminar on Geometry and Related Topics a
          1319, Spring, Graduate School of Science, 3
        • From 01 Apr. 2022, To 31 Mar. 2023
          Seminar on Geometry and Related Topics b
          1320, Fall, Graduate School of Science, 3
        • From 01 Apr. 2022, To 31 Mar. 2023
          Seminar on Geometry and Related Topics d
          1322, Fall, Graduate School of Science, 3
        • From Apr. 2021, To Mar. 2022
          Seminar on Geometry and Related Topics a
          Spring, 理学研究科
        • From Apr. 2021, To Mar. 2022
          Seminar on Geometry and Related Topics b
          Fall, 理学研究科
        • From Apr. 2021, To Mar. 2022
          Seminar on Geometry and Related Topics c
          Spring, 理学研究科
        • From Apr. 2021, To Mar. 2022
          Seminar on Geometry and Related Topics d
          Fall, 理学研究科

        Participation in PhD Defense

        • Embedded contact homology and its applications to3-dimensional Reeb flows
          SHIBATA TAISUKE, Graduate School of Science, Sub-chief Examiner
          25 Mar. 2024

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