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圏論的力学系の研究

Research Project

Project/Area Number 17J00227
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Geometry
Research InstitutionOsaka University
Research Fellow 菊田 康平  大阪大学, 理学研究科, 特別研究員(DC1)
Project Period (FY) 2017-04-26 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2019: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2018: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2017: ¥1,100,000 (Direct Cost: ¥1,100,000)
Keywords安定性条件 / 擬Anosov函手 / Serre次元 / CAT(0)性 / Gromov双曲性 / 圏論的エントロピー / 導来圏 / 距離空間 / エントロピー
Outline of Annual Research Achievements

研究課題である「圏論的力学系の研究」について,三角圏の自己同値群の力学的側面を考察した.以下,詳細を述べる.
(1)Dimitrov-Haiden-Katzarkov-Kontsevichにより,擬Anosov写像の圏論的類似として擬Anosov函手が導入された.報告者は,擬Anosov写像が持つ性質の圏論的類似を動機として,安定性条件のなす集合への作用の観点から擬Anosov函手を調べた.擬Anosov函手の双曲性を示すとともに,推移長(translation length)と圏論的エントロピーの間の不等式を導出した.同2019年にFan-Filip-Haiden-Katzarkov-Liuにより一般化された定義が与えられており,擬Anosov函手の理論はさらなる発展が見込める.
(2)Serre函手の圏論的エントロピーの漸近挙動は,代数多様体や多元環の次元のような振る舞いをする.この観察から導来圏,より広く三角圏に対してSerre次元という量が定義される.報告者は,高橋篤史氏と大内元気氏との共同研究で,このSerre次元とIkeda-Qiuにより定義された安定性条件の大域次元という量を比較した.さらにGepner型安定性条件を持つという仮定のもと,Serre次元が1より小さい三角圏の分類を行った.
(3)距離空間への等長作用という観点から,安定性条件の成す集合とその上の自然な距離の非正曲率的性質(CAT(0)性,Gromov双曲性)を調べた.結果として,この距離空間がCAT(0)でもGromov双曲的でもないことを示した.さらにKronecker箙の場合で,複素数体作用に関する商空間上の商距離がCAT(0)ではないことを示した.今後はK3曲面の場合に別の距離のCAT(0)性を考察し,自己同値群の等長作用を調べる.

Research Progress Status

令和元年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和元年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report

Research Products

(13 results)

All 2020 2019 2018 2017

All Journal Article (4 results) (of which Open Access: 4 results,  Peer Reviewed: 2 results) Presentation (9 results) (of which Int'l Joint Research: 4 results,  Invited: 5 results)

  • [Journal Article] Curvature of the space of stability conditions2019

    • Author(s)
      Kohei Kikuta
    • Journal Title

      arXiv:1907.10973

      Volume: -

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Journal Article] Serre dimension and stability conditions2019

    • Author(s)
      Kohei Kikuta, Genki Ouchi, Atsushi Takahashi
    • Journal Title

      arXiv:1907.10981

      Volume: -

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Journal Article] A NOTE ON ENTROPY OF AUTO-EQUIVALENCES: LOWER BOUND AND THE CASE OF ORBIFOLD PROJECTIVE LINES2018

    • Author(s)
      KIKUTA KOHEI、SHIRAISHI YUUKI、TAKAHASHI ATSUSHI
    • Journal Title

      Nagoya Mathematical Journal

      Volume: -

    • DOI

      10.1017/nmj.2018.21

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] On the Categorical Entropy and the Topological Entropy2017

    • Author(s)
      Kikuta Kohei、Takahashi Atsushi
    • Journal Title

      International Mathematics Research Notices

      Volume: -

    • DOI

      10.1093/imrn/rnx131

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Isometric actions of (derived) automorphism groups of K3 surfaces I and II (2 talks)2020

    • Author(s)
      Kohei Kikuta
    • Organizer
      Mini Workshop on "Derived Categories of Coherent Sheaves"
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Curvature of the space of stability conditions2019

    • Author(s)
      Kohei Kikuta
    • Organizer
      Interaction Between Algebraic Geometry and QFT
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Metric properties of the space of stability conditions2019

    • Author(s)
      Kohei Kikuta
    • Organizer
      Mirror Symmetry and Related Topics, 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 三角圏の自己同値群のCAT(0)空間への等長作用について2019

    • Author(s)
      菊田康平
    • Organizer
      数学と諸分野の連携にむけた若手数学者交流会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Entropy of Categorical dynamics(ポスター)2018

    • Author(s)
      菊田康平
    • Organizer
      String-Math 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] On categorical entropy2018

    • Author(s)
      Kohei Kikuta
    • Organizer
      Algebra / Algebraic Geometry seminar(The University of Sheffield)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Periodic points and Categorical entropy2018

    • Author(s)
      菊田康平
    • Organizer
      代数幾何学小研究集会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Entropy of Dynamics on Derived categories2017

    • Author(s)
      Kohei Kikuta
    • Organizer
      Derived category and birational geometry
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Periodic points and Categorical entropy2017

    • Author(s)
      菊田康平
    • Organizer
      代数幾何学サマースクール2017
    • Related Report
      2017 Annual Research Report
    • Invited

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Published: 2017-05-25   Modified: 2021-01-27  

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