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Pentagram map in tropical geometry and its application to discrete Morse theory

Research Project

Project/Area Number 17K18725
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Algebra, Geometry, and related fields
Research InstitutionKyoto University

Principal Investigator

Kato Tsuyoshi  京都大学, 理学研究科, 教授 (20273427)

Co-Investigator(Kenkyū-buntansha) 辻本 諭  京都大学, 情報学研究科, 准教授 (60287977)
岸本 大祐  京都大学, 理学研究科, 准教授 (60402765)
Project Period (FY) 2017-06-30 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2019: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsトロピカル幾何学 / 力学系 / Pitman変換 / Nahm変換 / 量子ランダムウオーク / ホモトピー型 / 箱玉系 / ピットマン変換 / Pentagram写像 / 離散モース理論
Outline of Final Research Achievements

In this project, we have studied two topics which are both based on global analysis of real dynamical systems of tropical geometry. Firstly, we have generalized the dynamical systems to the one with infinite number of the variables, by introducing some probabilistic approach. Secondly we have studied some homotopy theoretic aspects of quantum random walks which is a quantized version of tropical correspondence with quantum cell automata. In particular we have determined the homotopy types of the structure unitary groups of the former.

Academic Significance and Societal Importance of the Research Achievements

力学系の粗視化によってその大域構造の枠組みを抽出することをテーマにしている。特にトロピカル幾何学によるスケール変換の手法は、力学系のある種のコンパクト化と言える。通常の解析的手法では、その軌道が複雑すぎてコントロールできないような力学系に対して、その枠組みを抽出することで本質的な大域構造のみに着目してその解析を行う手法である。個別の事象に適用できるように、様々な一般化を行っている。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (11 results)

All 2020 2019 2018 Other

All Int'l Joint Research (3 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results) Presentation (4 results) (of which Int'l Joint Research: 4 results,  Invited: 4 results)

  • [Int'l Joint Research] サウサンプトン大学(英国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ECNU(中国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] University of Warwick(英国)

    • Related Report
      2017 Research-status Report
  • [Journal Article] DYNAMICS OF THE BOX-BALL SYSTEM WITH RANDOM INITIAL CONDITIONS VIA PITMAN’S TRANSFORMATION2020

    • Author(s)
      D.Croydon, T.Kato, M.Sasada and S.Tsujimoto
    • Journal Title

      Memoir of AMS (accepted)

      Volume: 1 Pages: 1-89

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Induced map on K theory for certain \Gamma-equivariant maps between Hilbert spaces2020

    • Author(s)
      T. Kato
    • Journal Title

      Journal of non commutative geometry (accepted)

      Volume: 1 Pages: 1-34

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] DYNAMICS OF THE BOX-BALL SYSTEM WITH RANDOM INITIAL CONDITIONS VIA PITMAN’S TRANSFORMATION2018

    • Author(s)
      D.Croydon, T.Kato, M.Sasada and S.Tsujimoto
    • Journal Title

      arXiv

      Volume: 1806.02147v1 Pages: 1-89

    • Related Report
      2018 Research-status Report
  • [Journal Article] Higher Nahm transform in non commutative geometry2018

    • Author(s)
      T. Kato, H. Sasahira and H. Wang
    • Journal Title

      arXiv

      Volume: 1807.08239, Pages: 1-26

    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dynamics of the box-ball system with random initial conditions2019

    • Author(s)
      S. Tsujimoto
    • Organizer
      9th International Congress on Industrial and Applied Mathematics, (Valencia, Spain
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Higher Nahm transform in non commutative geometry2018

    • Author(s)
      T. Kato
    • Organizer
      2018 Spring operator algebra program at ECNU
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Higher Nahm transform in non commutative geometry2018

    • Author(s)
      T. Kato
    • Organizer
      Workshop on Noncommutative Geometry and Representation Theory・四川大学
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Dynamics of the box-ball system with random initial conditions via Pitman's transformation2018

    • Author(s)
      M. Masada
    • Organizer
      Symmetriesand Integrability of Difference Equations
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2017-07-21   Modified: 2022-02-22  

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