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Infinite dimensional geometry of Kac-Moody groups and integrable systems

Research Project

Project/Area Number 20K22309
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0201:Algebra, geometry, analysis, applied mathematics,and related fields
Research InstitutionOsaka Metropolitan University (2022)
Osaka City University (2020-2021)

Principal Investigator

Morimoto Masahiro  大阪公立大学, 大学院理学研究科, 特任助教 (60880747)

Project Period (FY) 2020-09-11 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsカッツ・ムーディ幾何学 / 無限次元部分多様体 / Kac-Moody対称空間 / path空間 / Kac-Moody群 / 固有フレドホルム部分多様体 / path群作用 / path群・ループ群作用 / Hermann作用 / ヒルベルト空間の固有フレドホルム部分多様体 / 無限次元幾何学
Outline of Research at the Start

本研究の目的は,Kac-Moody群の幾何学を通してソリトンの対称性を統一理解することである.Kac-Moody群は,Kac-Moody代数に対応する群であり,これまで取り扱い困難として敬遠されてきたが,近年の無限次元部分多様体論の発展に伴い,その実体が明らかとなってきた.これらの研究を推し進め,可積分系理論に応用することで,柏原-神保-伊達-三輪のソリトン理論とTerng-Uhlenbeckのソリトン理論の統一理解を目指す.

Outline of Final Research Achievements

We obtained the following results which deepen the relation between infinite dimensional submanifold geometry and Kac-Moody geometry: We gave an explicit formula for orbits of path group actions given as isotropy representations of affine Kac-Moody symmetric spaces. We newly defined a certain isomorphism of path spaces and unified all known computational results of principal curvatures of proper Fredholm submanifolds. We showed that the isomorphism corresponds to an isomorphism of affine Kac-Moody symmetric spaces of group type. As an application of these we constructed many examples of infinite dimensional austere submanifolds.

Academic Significance and Societal Importance of the Research Achievements

カッツ・ムーディ代数は,無限の対称性を記述する言語として,数学や物理の様々な分野で現れる.しかし,無限である故にその取り扱いが難しく,特にカッツ・ムーディ群は,これまで避けられることが多かった.本研究では,無限次元部分多様体幾何学とカッツ・ムーディ幾何学の観点から,カッツ・ムーディ代数・群や関連分野に対する理解を深めることができた.これは数学や物理の基礎研究において,1つの基盤となる意義のある成果であると考えている.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (29 results)

All 2023 2022 2021 2020 Other

All Journal Article (9 results) (of which Peer Reviewed: 2 results,  Open Access: 6 results) Presentation (16 results) (of which Int'l Joint Research: 8 results,  Invited: 14 results) Remarks (3 results) Funded Workshop (1 results)

  • [Journal Article] Path group actions induced by sigma-actions and affine Kac-Moody symmetric spaces of group type2023

    • Author(s)
      Masahiro Morimoto
    • Journal Title

      arXiv:2201.01662

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Open Access
  • [Journal Article] CURVATURES AND AUSTERE PROPERTY OF ORBITS OF PATH GROUP ACTIONS INDUCED BY HERMANN ACTIONS2022

    • Author(s)
      Masahiro Morimoto
    • Journal Title

      Transform. Groups, to appear.

      Volume: 21 Issue: 06 Pages: 1-35

    • DOI

      10.1007/s00031-022-09732-w

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2016921

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] The 3rd Japan-Taiwan Joint Conference on Differential Geometry2022

    • Author(s)
      Masahiro Morimoto
    • Journal Title

      OCAMI Reports 2022

      Volume: 6 Pages: ii-220

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2020734

    • Related Report
      2022 Annual Research Report
    • Open Access
  • [Journal Article] On the geometry of orbits of path group actions induced by sigma-actions2022

    • Author(s)
      Masahiro Morimoto
    • Journal Title

      arXiv:2201.01662 (Preprint)

      Volume: -

    • Related Report
      2021 Research-status Report
    • Open Access
  • [Journal Article] On the converse problem for austere orbits of path group actions induced by Hermann actions2021

    • Author(s)
      Masahiro Morimoto
    • Journal Title

      Proceedings of The 23rd International Differential Geometry Workshop on Submanifolds in Homogeneous Spaces & Related Topics

      Volume: 23

    • Related Report
      2021 Research-status Report
  • [Journal Article] On weakly reflective submanifolds in compact isotropy irreducible Riemannian homogeneous spaces2021

    • Author(s)
      Masahiro Morimoto
    • Journal Title

      Tokyo Journal of Mathematics

      Volume: Vol. 44, No.2 Issue: 2

    • DOI

      10.3836/tjm/1502179344

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] On the geometry of orbits of path group actions induced by Hermann actions2021

    • Author(s)
      Masahiro Morimoto
    • Journal Title

      部分多様体論オンライン2020 講演録

      Volume: -

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Journal Article] On minimal PF submanifolds in Hilbert spaces with symmetries2021

    • Author(s)
      Masahiro Morimoto
    • Journal Title

      OCAMI Reports

      Volume: Vol. 1

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Journal Article] Minimal PF submanifolds in Hilbert spaces with symmetries2021

    • Author(s)
      Masahiro Morimoto
    • Journal Title

      OCAMI Reports

      Volume: Vol. 2 Pages: 78-100

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Presentation] Minimal PF submanifolds in Hilbert spaces with symmetries2023

    • Author(s)
      Masahiro Morimoto
    • Organizer
      The 3rd Shot of The 13th MSJ-SI ``Differential Geometry and Integrable Systems"
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ヒルベルト空間内の対称性をもつ極小固有フレドホルム部分多様体2022

    • Author(s)
      森本真弘
    • Organizer
      大阪公立大学 談話会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Geometry of orbits of path group actions induced by Hermann actions2022

    • Author(s)
      森本真弘
    • Organizer
      立命館大学幾何学セミナー
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Geometry of orbits of path group actions induced by Hermann actions2022

    • Author(s)
      Masahiro Morimoto
    • Organizer
      第14回GEOSOCKセミナー
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Hermann 作用から誘導されるpath群作用の軌道の幾何学2022

    • Author(s)
      森本真弘
    • Organizer
      第69回幾何学シンポジウム,パラレルセッション
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Hermann 作用から誘導されるpath群作用の軌道の幾何学2022

    • Author(s)
      森本真弘
    • Organizer
      日本数学会2022年度秋季総合分科会,一般講演
    • Related Report
      2022 Annual Research Report
  • [Presentation] Geometry of orbits of path group actions induced by Hermann actions2022

    • Author(s)
      Masahiro Morimoto
    • Organizer
      Correspondences of various geometries
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Curvatures and austere property of orbits of path group actions induced by Hermann actions2022

    • Author(s)
      Masahiro Morimoto
    • Organizer
      Geometry of symmetric spaces and group actions, February 19, 2022.
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Hermann作用から誘導されるpath群作用の軌道の幾何学2022

    • Author(s)
      森本 真弘
    • Organizer
      部分多様体幾何とリー群作用2021,2022年3月20日
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Curvatures and austere property of orbits of path group actions induced by Hermann actions2021

    • Author(s)
      Masahiro Morimoto
    • Organizer
      Differential Geometry of Submanifolds in Symmetric Spaces and Related Problems, July 2, 2021.
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Curvatures and austere property of orbits of path group actions induced by Hermann actions2021

    • Author(s)
      Masahiro Morimoto
    • Organizer
      The 3rd Japan-Taiwan Joint Conference on Differential Geometry, November 2, 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Minimal PF submanifolds in Hilbert spaces with symmetries2021

    • Author(s)
      Masahiro Morimoto
    • Organizer
      Submanifolds of Symmetric Spaces and their Time Evolutions
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] コンパクト・イソトロピー既約リーマン等質空間内の弱鏡映部分多様体について2021

    • Author(s)
      森本 真弘
    • Organizer
      日本数学会 2021年度年会,一般講演
    • Related Report
      2020 Research-status Report
  • [Presentation] On minimal PF submanifolds in Hilbert spaces with symmetries2021

    • Author(s)
      Masahiro Morimoto
    • Organizer
      The 27th Osaka City University International Academic Symposium, Mathematical Science of Visualization, and Deepening of Symmetry and Moduli
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ヒルベルト空間内の対称性をもつ極小固有フレドホルム部分多様体2020

    • Author(s)
      森本 真弘
    • Organizer
      筑波大学微分幾何学セミナー
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Hermann作用から誘導されるpath群作用の軌道の幾何学2020

    • Author(s)
      森本 真弘
    • Organizer
      部分多様体オンライン 2020
    • Related Report
      2020 Research-status Report
    • Invited
  • [Remarks] 森本真弘

    • URL

      https://sites.google.com/view/mmorimoto

    • Related Report
      2022 Annual Research Report
  • [Remarks] Webpage of M. Morimoto

    • URL

      https://sites.google.com/view/mmorimoto-e

    • Related Report
      2022 Annual Research Report
  • [Remarks] 森本 真弘

    • URL

      https://sites.google.com/view/mmorimoto

    • Related Report
      2021 Research-status Report 2020 Research-status Report
  • [Funded Workshop] The 5th International Workshop ``Geometry of Submanifolds and Integrable Systems"2022

    • Related Report
      2022 Annual Research Report

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Published: 2020-09-29   Modified: 2024-01-30  

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