• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Studies on some homogeneous submanifolds in symmetric spaces of noncompact type

Research Project

Project/Area Number 16K17603
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Geometry
Research InstitutionKitakyushu National College of Technology

Principal Investigator

Hashinaga Takahiro  北九州工業高等専門学校, 生産デザイン工学科, 准教授 (40772132)

Project Period (FY) 2016-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords対称空間 / 等質部分多様体 / ラグランジュ部分多様体 / リー群 / リー代数 / 非コンパクト型エルミート対称空間 / 等質ラグランジュ部分多様体 / 同変実現 / 接触計量多様体 / リッチソリトン / 幾何学
Outline of Final Research Achievements

In this research, we have studied some homogeneous submanifolds in symmetric spaces. In particular, we had progresses on classification problems of homogeneous Lagrangian submanifolds in Hermitian symmetric spaces of noncompact type. For group actions in the solvable part of the Iawasawa decomposition admitting a Lagrangian orbit, we gave complete classification of such group actions when the ambient space is the complex hyperbolic space. Moreover, in higher rank cases, we constructed many examples and gave a partial classification result of homogeneous Lagrangian submanifolds.

Academic Significance and Societal Importance of the Research Achievements

非コンパクト型エルミート対称空間への等質ラグランジュ部分多様体を許容する岩澤分解の可解部分の部分群作用の分類問題は, ある性質を満たす可解リー代数の分類問題に帰着される. しかしながら話をリー代数レベルに帰着させても, 一般に対称空間の階数が高い場合にはその分類は難しい. 本研究では, そのような問題に対して, ある性質を満たすグラフの分類問題に帰着させることで進展を得ることができた. 可解リー代数とグラフの間に対応を与え, 分類問題を解決するという試みは新しく, その意味で本研究の成果は学術的に意義があると思われる.

Report

(6 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (28 results)

All 2020 2019 2018 2017 2016 Other

All Int'l Joint Research (1 results) Journal Article (8 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 8 results,  Acknowledgement Compliant: 1 results) Presentation (19 results) (of which Int'l Joint Research: 5 results,  Invited: 15 results)

  • [Int'l Joint Research] University of Santiago de Compostela(スペイン)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] On local isometric embeddings of three-dimensional Lie groups2020

    • Author(s)
      Y.Agaoka, T.Hashinaga
    • Journal Title

      Geometriae Dedicata

      Volume: 205 Issue: 1 Pages: 191-219

    • DOI

      10.1007/s10711-019-00472-y

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Construction of noncompact Lagrangian orbits in some Hermitian symmetricspaces of noncompact type2019

    • Author(s)
      Takahiro Hashinaga
    • Journal Title

      Recent Topics in Differential Geometry and its Related Fields, World Scientific

      Volume: - Pages: 29-44

    • DOI

      10.1142/9789811206696_0003

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Realizations of some contact metric manifolds as Ricci soliton real hypersurfaces2018

    • Author(s)
      Jong Taek Cho, Takahiro Hashinaga, Akira Kubo, Yuichiro Taketomi, Hiroshi Tamaru
    • Journal Title

      J. Geom. Phys.

      Volume: 123 Pages: 221-234

    • DOI

      10.1016/j.geomphys.2017.08.013

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Three-dimensional solvsolitons and the minimality of the corresponding submanifolds2017

    • Author(s)
      Takahiro Hashinaga, Hiroshi Tamaru
    • Journal Title

      Internat. J. Math.

      Volume: 28 Issue: 06 Pages: 1750048-1750048

    • DOI

      10.1142/s0129167x17500483

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] The solvable models of noncompact real two-plane Grassmannians and some applications2017

    • Author(s)
      Jong Taek Cho, Takahiro Hashinaga, Akira Kubo, Yuichiro Taketomi, Hiroshi Tamaru
    • Journal Title

      Hermitian-Grassmannian Submanifolds

      Volume: 203 Pages: 311-321

    • DOI

      10.1007/978-981-10-5556-0_26

    • ISBN
      9789811055553, 9789811055560
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A class of non-compact homogeneous Lagrangian submanifolds in complex hyperbolic spaces2017

    • Author(s)
      Takahiro Hashinaga, Toru Kajigaya
    • Journal Title

      Ann. Global Anal. Geom.

      Volume: 51 Issue: 1 Pages: 21-33

    • DOI

      10.1007/s10455-016-9521-5

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] HOMOGENEOUS RICCI SOLITON HYPERSURFACES IN THE COMPLEX HYPERBOLIC SPACES2016

    • Author(s)
      Takahiro Hashinaga, Akira Kubo, Hiroshi Tamaru
    • Journal Title

      Tohoku Mathematical Journal, Second Series

      Volume: 68 Issue: 4 Pages: 559-568

    • DOI

      10.2748/tmj/1486177215

    • NAID

      130008144991

    • ISSN
      0040-8735, 2186-585X
    • Year and Date
      2016-12-30
    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] Milnor-type theorems for left-invariant Riemannian metrics on Lie groups2016

    • Author(s)
      Takahiro Hashinaga, Hiroshi Tamaru, Kazuhiro Terada
    • Journal Title

      Journal of the Mathematical Society of Japan

      Volume: 68 Issue: 2 Pages: 669-684

    • DOI

      10.2969/jmsj/06820669

    • NAID

      130006887138

    • ISSN
      0025-5645, 1881-1167, 1881-2333
    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Presentation] 3次元リーマン多様体の余次元1局所等長埋め込み2020

    • Author(s)
      橋永貴弘
    • Organizer
      筑波大学微分幾何学セミナー
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 非コンパクト型エルミート対称空間の同変実現2020

    • Author(s)
      橋永貴弘, 梶ヶ谷徹
    • Organizer
      日本数学会2021年度年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 根付き木を用いたラグランジュ部分代数の構成2019

    • Author(s)
      橋永貴弘
    • Organizer
      北九州幾何学研究集会2019
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 根付き木を用いた等質ラグランジュ部分多様体の構成2019

    • Author(s)
      橋永貴弘
    • Organizer
      Submanifold theory in a wider sense
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 3次元warped product計量の局所等長埋め込み2019

    • Author(s)
      阿賀岡芳夫, 橋永貴弘
    • Organizer
      日本数学会2019年度秋季総合分科会
    • Related Report
      2019 Research-status Report
  • [Presentation] Realizations of contact metric ( κ , μ ) -spaces as homogeneous real hypersurfaces in noncompact real two-plane Grassmannians2019

    • Author(s)
      Takahiro Hashinaga
    • Organizer
      Symmetry and Shape -Celebrating the 60th birthday of Prof. J. Berndt
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 非コンパクト型エルミート対称空間内の等質部分多様体2019

    • Author(s)
      橋永貴弘
    • Organizer
      測地線及び関連する諸問題
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 岩澤分解の冪零部分とその部分リー代数2019

    • Author(s)
      橋永貴弘
    • Organizer
      淡路島幾何学研究集会2019
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 根付き木を用いたラグランジュ部分代数の構成2019

    • Author(s)
      橋永貴弘
    • Organizer
      北九州ワークショップ「幾何学と組合せ論2019」
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Noncompact homogeneous Lagrangian submanifolds in complex hyperbolic spaces2018

    • Author(s)
      Takahiro Hashinaga
    • Organizer
      Hiroshima Differential Geometry Day 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 記号的方法と局所等長埋め込み問題への応用2018

    • Author(s)
      橋永貴弘
    • Organizer
      北九州ワークショップ2018「不変式論と微分幾何学への応用」
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Homogeneous Lagrangian submanifolds in Hermitian symmetric spaces of noncompact type2018

    • Author(s)
      Takahiro Hashinaga
    • Organizer
      ICDG 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 3次元リーマン多様体の局所等長埋め込み2017

    • Author(s)
      橋永 貴弘
    • Organizer
      信州大学数理科学談話会, 数理経済談話会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 3次元リーマン多様体の局所等長埋め込み2017

    • Author(s)
      橋永 貴弘
    • Organizer
      淡路島幾何学研究集会2018
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Realizations of some contact metric manifolds as Ricci soliton real hypersurfaces2017

    • Author(s)
      Jong Taek Cho, 橋永 貴弘, 久保 亮, 武富 雄一郎, 田丸 博士
    • Organizer
      日本数学会2018年度会
    • Related Report
      2017 Research-status Report
  • [Presentation] 3次元リーマン多様体が4次元ユークリッド空間へ局所等長埋め込み可能となるための必要十分条件2017

    • Author(s)
      阿賀岡 芳夫, 橋永 貴弘
    • Organizer
      日本数学会2017年度会
    • Place of Presentation
      首都大学東京(東京都)
    • Related Report
      2016 Research-status Report
  • [Presentation] On homogeneous Lagrangian submanifolds in complex hyperbolic spaces2017

    • Author(s)
      Takahiro Hashinaga
    • Organizer
      The 13th OCAMI-RIRCM Joint Differential Geometry Workshop on Submanifold Geometry and Lie Theory
    • Place of Presentation
      大阪市立大学(大阪府)
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 複素双曲空間内の等質ラグランジュ部分多様体2016

    • Author(s)
      橋永 貴弘
    • Organizer
      合宿セミナー2016 in 山口
    • Place of Presentation
      山口紅花舎(山口県)
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] On homogeneous Lagrangian submanifolds in complex hyperbolic spaces2016

    • Author(s)
      Takahiro Hashinaga
    • Organizer
      Differential Geometry, Lie Theory and Low-Dimensional Topology
    • Place of Presentation
      Melbourne(オーストラリア)
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited

URL: 

Published: 2016-04-21   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi