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Research on integrable geometry and submanifolds

Research Project

Project/Area Number 21K03214
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 11020:Geometry-related
Research InstitutionTohoku University

Principal Investigator

Miyaoka Reiko  東北大学, 理学研究科, 名誉教授 (70108182)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywords等径超曲面 / ガウス写像 / フレア理論 / ラグランジュ部分多様体 / 極小曲面 / 2次元戸田方程式 / 除外値問題 / Chern予想 / Dupin超曲面 / 戸田方程式
Outline of Research at the Start

1. 数学においては,理論形成と,それを具体例に当てはめてさらなる発展をめざすことが車の両輪である.我々は等径超曲面のガウス写像を用いることにより,フレア理論に具体的な意味を与える.
2. 曲面論は可積分系理論の生みの親ともいえる.80年代に,Wenteの平均曲率一定トーラスの発見, Uhlenbeckによる2次元球面からの調和写像の分類理論などが成功を収めたことに触発され,Lawson予想が2次元戸田方程式の周期型解と結びつくことを発見した.これをさらに発展させる.
3. 古典的極小曲面論に古くから存在する非常に困難な問題に引き続き挑戦し,解決の道を探る.

Outline of Final Research Achievements

Regarding the unresolved part of the Floer homology of the Gauss image L of a spherical isoparametric hypersurface N, we made the calculation of the topology of N applicable to more general spaces, and partially solved the calculation of the cohomolology of L. Particularly in the case related to the Clifford algebra containing an infinite number of non-homogeneous examples, we have even calculated the cohomology of L in some cases.This is a collaborative research with Yoshihiro Ohnita of Osaka Metropolitan University and Hiroshi Irie of Ibaraki University.
Regarding minimal surfaces, we have conducted research on metrically characterizing minimal Lagrangian surfaces in complex projective spaces, using periodic solutions of some integrable equation. We have also worked on the excluded value problem of Gauss maps of algebraic minimal surfaces.
Recently, we are studying the Chern conjecture in the case of Dupin hypersurfaces.

Academic Significance and Societal Importance of the Research Achievements

Arnold予想の解決につながるフレア理論において,フレアホモロジーは特殊な場合にしか計算されておらず,非等質例を無限に含む等径超曲面のガウス像は好い対象であるが,その位相は複雑なので,その未解決部分に挑戦をしている.
極小曲面論は可積分系理論との関連において,曲面の計量のみたす2次元戸田方程式の解との関係が重要である.以前得た周期解と曲面の構造の関係を,複素射影空間の極小ラグランジュ曲面に適用すると興味深い結果が得られる.また代数的極小曲面のガウス写像の除外値問題は難解でライフワークとして取り組んでいる.
Chern予想にDupin超曲面で取り組むことは斬新である.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (17 results)

All 2024 2023 2022 2021 Other

All Journal Article (6 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 7 results) Book (1 results) Remarks (2 results) Funded Workshop (1 results)

  • [Journal Article] iの発見と破面の幾何学2024

    • Author(s)
      宮岡礼子
    • Journal Title

      数学通信

      Volume: 28-4 Pages: 5-25

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 曲線と曲面を考える--様々な視点からの導入--2024

    • Author(s)
      宮岡礼子
    • Journal Title

      数理科学

      Volume: 62-2 Pages: 5-6

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] E.Calabiに思いを寄せて2023

    • Author(s)
      宮岡礼子
    • Journal Title

      科学

      Volume: 93-2 Pages: 103-105

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] 光の波面の幾何学から2023

    • Author(s)
      宮岡礼子
    • Journal Title

      岡シンポジウム講義録

      Volume: 20 Pages: 67-102

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 研究室の窓「原点は極小曲面」2022

    • Author(s)
      宮岡礼子
    • Journal Title

      数理科学

      Volume: 60 Pages: 70-76

    • Related Report
      2022 Research-status Report
  • [Journal Article] Moment maps and isoparametric hypersurfaces of OT-FKM type2021

    • Author(s)
      Reiko Miyaoka
    • Journal Title

      Science China Mathematics

      Volume: 64 Issue: 7 Pages: 1621-1628

    • DOI

      10.1007/s11425-020-1746-2

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Review of my research2023

    • Author(s)
      Reiko Miyaoka
    • Organizer
      The 3rd Shot of The 13th MSJ-SI “Differential Geometry and Integrable Systems”
    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] i の発見と波面の幾何学2023

    • Author(s)
      宮岡礼子
    • Organizer
      2023年度日本数学会秋季総合分科会市民講演会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 極小曲面を解析する2023

    • Author(s)
      宮岡礼子
    • Organizer
      NHK文化センター数学講座 現代数学の最先端
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Recent progress on the topology of Gauss images of isoparametric hypersurfaces2022

    • Author(s)
      Reiko Miyaoka
    • Organizer
      Symmetry in Geometry and Analysis (a conference in honor of Prof. Toshiyuki Kobayashi )
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Various aspects of isoparametric hypersurfaces2022

    • Author(s)
      Reiko Miyaoka
    • Organizer
      The 2nd Shot of The 13th MSJ-SI “Differential Geometry and Integrable Systems”
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Geometry of light wave fronts2022

    • Author(s)
      宮岡礼子
    • Organizer
      20th Oka Symposium
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 等径超曲面のガウス像のラグランジュ交叉理論へのアプローチ2021

    • Author(s)
      宮岡礼子
    • Organizer
      平戸微分幾何学研究討論会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Book] 極小曲面2022

    • Author(s)
      宮岡 礼子、岡本 和夫、桂 利行、楠岡 成雄、坪井 俊
    • Total Pages
      252
    • Publisher
      共立出版
    • ISBN
      9784320114692
    • Related Report
      2022 Research-status Report 2021 Research-status Report
  • [Remarks] 宮岡礼子のホームページ

    • URL

      http://www.math.tohoku.ac.jp/people/miyaoka/indexv3.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] Reiko Miyaoka

    • URL

      http://www.math.tohoku.ac.jp/people/miyaoka/indexv3.html

    • Related Report
      2021 Research-status Report
  • [Funded Workshop] 第6回中国-日本幾何学研究集会2021

    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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