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The geometry of character variety given by the dynamics of mapping class group action

Research Project

Project/Area Number 17K05250
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geometry
Research InstitutionNara Women's University

Principal Investigator

Yamashita Yasushi  奈良女子大学, 自然科学系, 教授 (70239987)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywords双曲幾何学 / クライン群 / 低次元トポロジー
Outline of Final Research Achievements

Hyperbolic geometry is important in studying two and three-dimensional manifolds. To understand this geometric structure, we studied the character variety of the fundamental group of two-dimensional manifolds.
In particular, we studied the realization problem of Jorgensen numbers of the Kleinian groups generated by two elements. Also, we performed a computer experiment on the problem of when randomly generated two parabolic elements give a Kleinian group.

Academic Significance and Societal Importance of the Research Achievements

現代の位相幾何学における主要な研究対象である図形に多様体とよばれるものがあり、それらがどのような形の変形を許容するのかという問題にアプローチすることは、数学の研究を進める上で基本的な意義がある。さらに、力学系などの解析的な手法や群の作用という代数との関係を明らかにすることにより、分野間の新たなつながりの解明に貢献した。また、本研究は手法としては計算機実験を特徴としており、計算機の応用領域を数理科学に拡げるという形での意義もある。

Report

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

    (8 results)

All 2019 2018 2017 Other

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results) Remarks (1 results)

  • [Journal Article] The realization problem for J?rgensen numbers2019

    • Author(s)
      Yamashita Yasushi、Yamazaki Ryosuke
    • Journal Title

      Conformal Geometry and Dynamics of the American Mathematical Society

      Volume: 23 Issue: 2 Pages: 17-31

    • DOI

      10.1090/ecgd/331

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The diagonal slice of Schottky space2017

    • Author(s)
      Series Caroline、Tan Ser、Yamashita Yasushi
    • Journal Title

      Algebraic & Geometric Topology

      Volume: 17 Issue: 4 Pages: 2239-2282

    • DOI

      10.2140/agt.2017.17.2239

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] The diagonal slice of schottky space2019

    • Author(s)
      Yasushi Yamashita
    • Organizer
      Computational Problems in Low-dimensional Topology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] メビウス変換群の離散性判定問題について,2018

    • Author(s)
      山下靖
    • Organizer
      第65 回トポロ ジーシンポジウム
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] The realization problem for Jorgensen numbers2017

    • Author(s)
      山下靖
    • Organizer
      ミニワークショップ ``Growth 4"
    • Related Report
      2017 Research-status Report
  • [Presentation] The realization problem for Jorgensen numbers2017

    • Author(s)
      山下靖
    • Organizer
      研究集会「リーマン面に関連する位相幾何学」
    • Related Report
      2017 Research-status Report
  • [Presentation] The realization problem for Jorgensen numbers2017

    • Author(s)
      山下靖
    • Organizer
      「リーマン面・不連続群論」研究集会
    • Related Report
      2017 Research-status Report
  • [Remarks] Yasushi Yamashita

    • URL

      http://vivaldi.ics.nara-wu.ac.jp/~yamasita/

    • Related Report
      2018 Research-status Report 2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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