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The family of Hessenberg varieties and integrable systems

Research Project

Project/Area Number 18K13413
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 11020:Geometry-related
Research InstitutionOkayama University of Science (2020-2022)
Osaka Prefecture University (2018-2019)

Principal Investigator

ABE Hiraku  岡山理科大学, 理学部, 講師 (00736499)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords旗多様体 / ヘッセンバーグ多様体 / Peterson多様体 / 完全可積分系 / 弱Fano多様体 / コホモロジー環 / 特異点 / 正規性 / 基本関係式 / Schubert多様体 / 基底 / 正値性 / Hessenberg多様体 / Fano多様体 / Mishchenko-Fomenko多項式 / 戸田格子 / 可積分系
Outline of Final Research Achievements

In this research project, we study geometric properties of Hessenberg varieties, centering on studying the connection between Hessenberg varieties and integrable systems. As one of the achievements, we proved that the family of Hessenberg varieties which are defined for a specific Hessenberg space admits a completely integrable system. Also, we determined a necessary and sufficient condition for a regular semisimple Hessenberg variety to be a (weak) Fano variety, and we determine the ring structure of the integral cohomology of Peterson variety, and we gave a geometric interpretation of Peterson Schubert calculus, and we determined a necessary and sufficient condition for a regular nilpotent Hessenberg variety to be a normal algebraic variety.

Academic Significance and Societal Importance of the Research Achievements

ヘッセンバーグ多様体は比較的新しい研究対象であり,幾何学・表現論・組合せ論の新たな架け橋として近年活発に研究されている.これまではヘッセンバーグ多様体のトポロジーを中心に様々な研究が進められ,その幾何学は未知の部分が多かった.本研究課題はこの点に注目し,可積分系との関係を軸にヘッセンバーグ多様体の幾何学について研究を行ったものである.
ヘッセンバーグ多様体については研究すべき問題が豊富に残っており,若手の研究者や大学院生でも挑戦できる問題も沢山ある.このようなテーマの基礎となる幾何学を研究し,その性質を明らかにすることは意義のあることと考えられる.

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (27 results)

All 2023 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (6 results) Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results) Presentation (17 results) (of which Int'l Joint Research: 9 results,  Invited: 7 results)

  • [Int'l Joint Research] Florida Gulf Coast University(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] 華中科技大学(中国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] 華中科技大学(中国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] 華中科技大学(中国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] 華中科技大学(中国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Northeastern University(米国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Fano and weak Fano Hessenberg varieties2021

    • Author(s)
      Hiraku Abe, Naoki Fujita, and Haozhi Zeng
    • Journal Title

      Michigan Math. J.

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Geometry of regular Hessenberg varieties2020

    • Author(s)
      Hiraku Abe, Naoki Fujita, and Haozhi Zeng
    • Journal Title

      Transform. Groups

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A survey of recent developments on Hessenberg varieties2020

    • Author(s)
      Hiraku Abe and Tatsuya Horiguchi
    • Journal Title

      Adv. Stud. Pure Math.

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Hessenberg varieties, Slodowy slices, and integrable systems2019

    • Author(s)
      H. Abe and P. Crooks
    • Journal Title

      Math. Z.

      Volume: 291(3) Pages: 1093-1132

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Hessenberg多様体2023

    • Author(s)
      阿部拓
    • Organizer
      AGU表現論セミナー:幾何学と表現論を巡って
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Peterson varieties and Cartan toric orbifolds2023

    • Author(s)
      阿部拓
    • Organizer
      Toric topology 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Peterson多様体とトーリック軌道体2022

    • Author(s)
      阿部拓
    • Organizer
      阿部拓 第4回 ヘッセンバーグ勉強会2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] Peterson Schubert calculus2022

    • Author(s)
      阿部拓
    • Organizer
      第24回 代数曲面ワークショップ at 半田山
    • Related Report
      2022 Annual Research Report
  • [Presentation] A型Peterson-Schubert calculusの幾何と計算2022

    • Author(s)
      阿部拓
    • Organizer
      変換群論の新潮流
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Some computations in the cohomology of Peterson varieties2022

    • Author(s)
      阿部拓
    • Organizer
      第3回 ヘッセンバーグ勉強会
    • Related Report
      2021 Research-status Report
  • [Presentation] Geometry of Peterson Schubert calculus2021

    • Author(s)
      阿部拓
    • Organizer
      ヘッセンバーグ勉強会
    • Related Report
      2021 Research-status Report
  • [Presentation] Geometry of Peterson Schubert calculus and its computations2021

    • Author(s)
      Hiraku Abe
    • Organizer
      Hessenberg seminars 2021-2022 in Osaka by Zoom
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Peterson 多様体の整係数コホモロジー2021

    • Author(s)
      阿部拓
    • Organizer
      第2回 ヘッセンバーグ勉強会
    • Related Report
      2021 Research-status Report
  • [Presentation] On the integral cohomology ring of the Peterson variety2021

    • Author(s)
      Hiraku Abe
    • Organizer
      Toric topology in Osaka 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Geometry of Hessenberg varieties2020

    • Author(s)
      Hiraku Abe
    • Organizer
      Geometry and Topology Seminar
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] The integral cohomology rings of Peterson varieties2020

    • Author(s)
      Hiraku Abe
    • Organizer
      Washington University weekend workshop on geometry and combinatorics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Toric topology of Peterson varieties2020

    • Author(s)
      Hiraku Abe
    • Organizer
      Washington University weekend workshop on geometry and combinatorics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Hessenberg varieties2019

    • Author(s)
      Hiraku Abe
    • Organizer
      Hamiltonian systems and Lie groups
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 旗多様体上のあるベクトル束に現れる正則 Poisson 構造と完全可積分系 について2018

    • Author(s)
      阿部拓
    • Organizer
      変換群論における幾何・代数・組み合わせ論
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] An introduction to Hessenberg varieties2018

    • Author(s)
      Hiraku Abe
    • Organizer
      Hessenberg Varieties in Combinatorics, Geometry and Representation Theory
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] An introduction to Hessenberg varieties2018

    • Author(s)
      Hiraku Abe
    • Organizer
      Hessenberg varieties 2018 in Osaka
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2024-01-30  

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