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Differential geometry and Lagrangian Floer theory for Lagrangian fibrations

Research Project

Project/Area Number 15K04847
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geometry
Research InstitutionMeiji University (2016-2019)
Kagawa University (2015)

Principal Investigator

Nohara Yuichi  明治大学, 理工学部, 専任准教授 (60447125)

Project Period (FY) 2015-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
KeywordsGrassmann多様体 / ミラー対称性 / クラスター代数 / 壁越え公式 / 完全可積分系 / Floer理論 / ラグランジュ部分多様体 / フレアー理論 / グラスマン多様体
Outline of Final Research Achievements

The two-plane Grassmannian Gr(2,n) has several completely integrable systems, and each of which gives a cluster torus of the Landau-Ginzburg mirror of Gr(2,n) by SYZ mirror symmetry. We construct families of completely integrable systems which interpolate the above mentioned completely integrable systems, and show that the Floer theoretic wall-crossing formula for the completely integrable systems coincides with the cluster transformation in the mirror side.
We also computed the wall-crossing formula for a completely integrable system, called the Gelfand-Cetlin system, on the Grassmannian Gr(3,6) of 3-dimensional subspaces in the 6-dimensional vector space, and proved that it induces the cluster transformation in the mirror side.

Academic Significance and Societal Importance of the Research Achievements

Grassmann多様体とそのミラーは表現論やクラスター代数の観点からも非常に重要な例である。ミラー対称性とクラスター代数の関係はある程度一般的な現象だと考えられているが,その証明は多くの場合,Floer理論のトロピカル極限で構成されている。一方本研究では,平面Grassmann多様体の場合にLagrangeトーラスの幾何を直接扱うFloer理論を用いて,ミラー側にクラスター代数の構造が現れることを示している。また,Gr(3,6) の場合に得られた壁越え公式の中には,Plucker座標ではないクラスター変数が現れる例が含まれる。これはより一般の場合を理解するための重要な例になると思われる。

Report

(6 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (13 results)

All 2019 2018 2017 2016 2015

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Acknowledgement Compliant: 2 results) Presentation (11 results) (of which Int'l Joint Research: 3 results,  Invited: 9 results)

  • [Journal Article] Floer cohomologies of non-torus fibers of the Gelfand-Cetlin system2016

    • Author(s)
      Yuichi Nohara, Kazushi Ueda
    • Journal Title

      Journal of Symplectic Geometry

      Volume: 14 Issue: 4 Pages: 1251-1293

    • DOI

      10.4310/jsg.2016.v14.n4.a9

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Goldman systems and bending systems2015

    • Author(s)
      Y. Nohara and K. Ueda
    • Journal Title

      Canad. J. Math.

      Volume: 67 Issue: 5 Pages: 1109-1143

    • DOI

      10.4153/cjm-2015-004-2

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Lagrangian fibrations on Grassmannians and cluster transformations2019

    • Author(s)
      野原雄一
    • Organizer
      Toric Topology 2019 in Okayama
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Potential functions on two-plane Grassmannians and cluster transformations2018

    • Author(s)
      野原雄一
    • Organizer
      Kobe Studio Seminar for Mathematics
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Potential functions on two-plane Grassmannians and cluster mutations2018

    • Author(s)
      野原雄一
    • Organizer
      名古屋大学幾何学セミナー
    • Related Report
      2017 Research-status Report
  • [Presentation] Floer theory on Grassmann and cluster algebra2018

    • Author(s)
      野原雄一
    • Organizer
      研究集会「シンプレクティック幾何とその周辺」
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Lagrangian fibrations on two-plane Grassmannians and mirror symmetry2017

    • Author(s)
      Yuichi Nohara
    • Organizer
      IBS-CGP Seminar
    • Place of Presentation
      IBS-CGP, Korea
    • Year and Date
      2017-03-21
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Lagrangian fibrations on two-plane Grassmannians and mirror symmetry2017

    • Author(s)
      野原雄一
    • Organizer
      慶応大学 微分幾何・トポロジーセミナー
    • Related Report
      2017 Research-status Report
  • [Presentation] Lagrangian fibrations on two-plane Grassmannians and mirror symmetry2017

    • Author(s)
      野原雄一
    • Organizer
      2017年度福岡大学微分幾何研究集会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Lagrangian fibrations on Grassmannians and cluster transformations2016

    • Author(s)
      Yuichi Nohara
    • Organizer
      Workshop on mirror symmetry and related topics
    • Place of Presentation
      京都大学
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Lagrangian fibrations on Grassmannians and mirror symmetry2016

    • Author(s)
      野原雄一
    • Organizer
      研究集会「量子化の幾何学2016」
    • Place of Presentation
      早稲田大学理工学部
    • Year and Date
      2016-12-09
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Integrable systems on Grassmannians and mirror symmetry2016

    • Author(s)
      Yuichi Nohara
    • Organizer
      International Conference for the 70th Anniversary of Korean Mathematical Society
    • Place of Presentation
      Seoul National University, Korea
    • Year and Date
      2016-10-23
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Lagrangian fbrations on Grassmannians and mirror symmetry2015

    • Author(s)
      野原雄一
    • 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
      2015-09-13
    • Related Report
      2015 Research-status Report
    • Invited

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Published: 2015-04-16   Modified: 2021-02-19  

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