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Study of rigidity of discrete groups by geometric methods

Research Project

Project/Area Number 17340015
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Geometry
Research InstitutionNagoya University

Principal Investigator

NAYATANI Shin  Nagoya University, 大学院・多元数理科学研究科, 教授 (70222180)

Co-Investigator(Kenkyū-buntansha) 金井 雅彦  名古屋大学, 大学院・多元数理科学研究科, 孝和授 (70183035)
中西 敏浩  島根大学, 総合理工学部, 教授 (00172354)
小谷 元子  東北大学, 大学院・理学研究科, 教授 (50230024)
井関 裕靖  東北大学, 大学院・理学研究科, 准教授 (90244409)
糸 健太郎  名古屋大学, 大学院・多元数理科学研究科, 助教 (00324400)
Co-Investigator(Renkei-kenkyūsha) SATO Hajime  名古屋大学, 大学院・多元数理科学研究科, 名誉教授 (30011612)
EJIRI Norio  名城大学, 理工学部, 教授 (80145656)
KANAI Masahiko  名古屋大学, 大学院・多元数理科学研究科, 教授 (70183035)
NAKANISHI Toshihiro  島根大学, 総合理工学部, 教授 (00172354)
KOTANI Motoko  東北大学, 大学院・理学研究科, 教授 (50230024)
NAITO Hisashi  名古屋大学, 大学院・多元数理科学研究科, 准教授 (40211411)
IZEKI Hiroyasu  東北大学, 大学院・理学研究科, 准教授 (90244409)
KAMADA Hiroyuki  宮城教育大学, 教育学部, 准教授 (00249799)
ITO Kentaro  名古屋大学, 大学院・多元数理科学研究科, 准教授 (00324400)
Project Period (FY) 2005 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥16,240,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥1,740,000)
Fiscal Year 2008: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2007: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2006: ¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 2005: ¥4,500,000 (Direct Cost: ¥4,500,000)
Keywords離散群 / ランダム群 / 固定点性質 / CAT(0)空間 / 不変量δ / 歪み係数 / (動径的)歪み係数 / 四元数CR多様体 / ツイスター空間 / 超CR多様体 / 超剛性定理 / 結晶格子 / クライン群 / 組合せ調和写像 / シュワルツ微分 / 極小曲面 / トレース恒等式 / 定スカラー曲率ケーラー計量 / 射影構造
Research Abstract

組合せ調和写像をランダム群の固定点性質の解明に応用する研究を行った。成果として、三角モデルのランダム群があるクラスに属するCAT(0)空間のすべてに対して固定点性質を持つという結果を得た。また、グラフモデルのランダム群がより広いクラスに属するCAT(0)空間のすべてに対して固定点性質をもつことを証明した。これらCAT(0)空間のクラスは、ある不変量δを用いて記述されるので、不変量δを上から評価する問題に取り組んだ。CAT(0)空間の接錐の歪み係数を用いて上から評価できることを明らかにし、ユークリッド的ビルディングの場合にこの評価を実行した。

Report

(5 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • Research Products

    (38 results)

All 2009 2008 2007 2006 2005 Other

All Journal Article (20 results) (of which Peer Reviewed: 8 results) Presentation (15 results) Book (3 results)

  • [Journal Article] Fixed-point property of random groups2009

    • Author(s)
      井関裕靖, 近藤剛史, 納谷信
    • Journal Title

      to appear in Annals of Global Analysis and Geometry 35

      Pages: 363-379

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] On continuous extensions of grafting maps2008

    • Author(s)
      糸 健太郎
    • Journal Title

      Trans. Amer. Math. Soc 360

      Pages: 3731-3749

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Complex submanifolds and Lagrangian submanifolds associate with minimal surfaces in tori2007

    • Author(s)
      江尻 典雄
    • Journal Title

      Topics in contemporary differential geometry, complex analysis and mathematical physics

      Pages: 66-73

    • Related Report
      2007 Annual Research Report
  • [Journal Article] A trace identity for parabolic elements of SL (2,C)2007

    • Author(s)
      中西 敏浩
    • Journal Title

      Kodai Math. J 30

      Pages: 1-18

    • NAID

      120005679553

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Exotic projective structures and quasi-Fuchsian space2007

    • Author(s)
      糸 健太郎
    • Journal Title

      Duke. Math. J. 140

      Pages: 85-109

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 調和写像による超剛性定理および固定点定理へのアプローチ2006

    • Author(s)
      井関裕靖, 納谷信
    • Journal Title

      数学(岩波書店) 158

      Pages: 239-262

    • NAID

      10018386816

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] A fixed-point theorem for discrete-group actions on Hadamard spaces2006

    • Author(s)
      井関裕靖, 近藤剛史, 納谷信
    • Journal Title

      数理解析研究所講究録1492「一般・幾何学的トポロジーと幾何学的群論」

      Pages: 56-64

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] 調和写像による超剛性定理および固定点定理へのアプローチ2006

    • Author(s)
      納谷 信, 井関 裕靖
    • Journal Title

      数学(岩波書店) 58

      Pages: 239-262

    • NAID

      10018386816

    • Related Report
      2006 Annual Research Report
  • [Journal Article] A fixed-point theorem for discrete-group actions on Hadamard spaces2006

    • Author(s)
      納谷 信, 井関 裕靖, 近藤 剛史
    • Journal Title

      数理解析研究所講究録 1492

      Pages: 56-64

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Large deviation and the tangent cone at infinity of a crystal lattice2006

    • Author(s)
      小谷 元子, 砂田 利一
    • Journal Title

      Mathematische Zeitschrift 254

      Pages: 837-870

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Grafting and components of quasi-Fuchsian projective structures2006

    • Author(s)
      糸 健太郎
    • Journal Title

      London Mathematical Society Lecture Note Series 329

      Pages: 355-373

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Grafting and components of quasi-fuchsian projective structures2006

    • Author(s)
      糸 健太郎
    • Journal Title

      Spaces of Kleinian groups, LMS Lecture note series 329 (to appear)

      Pages: 355-373

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A fixed-point theorem for discrete-group actions on Hadamard spaces2006

    • Author(s)
      納谷 信, 近藤剛史, 井関裕靖
    • Journal Title

      数理解析研究所講究録 (掲載予定)

      Pages: 56-64

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Combinatorial harmonic maps and discrete-group actions on Hadamard spaces2005

    • Author(s)
      井関裕靖
    • Journal Title

      Geom.~Dedicata114

      Pages: 147-188

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Combinatorial harmonic maps and discrete-group actions on Hadamard spaces2005

    • Author(s)
      納谷信, 井関裕靖
    • Journal Title

      Geom.Dedicata 114

      Pages: 147-188

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Another natural lift of a Kahler submanifold of a quaternionic Kahler manifold to the twistor space2005

    • Author(s)
      江尻典雄, 塚田和美
    • Journal Title

      Tokyo J.Math. 28

      Pages: 71-78

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Stable simply connected minimal surfaces in R^N and SO(N,C)-action2005

    • Author(s)
      江尻典雄
    • Journal Title

      Contemporary aspects of complex analysis, differential geometry and mathematical physics

      Pages: 64-73

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A potential and catastrophe of a soap film2005

    • Author(s)
      江尻典雄, 岡本 隆
    • Journal Title

      Contemporary aspects of complex analysis, differential geometry and mathematics physics

      Pages: 257-269

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Fixed-paint property of random groups

    • Author(s)
      納谷信, 井関裕靖, 近藤剛史
    • Journal Title

      Annals of Global Analysis and Geometry, Published online on 11 November 2008 (未定)(掲載決定済み)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Large deviation and the tangent cone at infinity of a crystal lattice

    • Author(s)
      小谷元子, 砂田利一
    • Journal Title

      Math.Z. (掲載確定)

    • Related Report
      2005 Annual Research Report
  • [Presentation] 離散群の固定点性質と調和写像2009

    • Author(s)
      納谷信
    • Organizer
      大阪市立大学幾何学セミナー
    • Place of Presentation
      大阪市立大学
    • Year and Date
      2009-01-14
    • Related Report
      2008 Final Research Report
  • [Presentation] A fixed-point property of discrete groups and energy of equivariant maps2008

    • Author(s)
      井関裕靖
    • Organizer
      1^st MSJ-SI ``Probabilistic Approach to Geometry''
    • Place of Presentation
      京都大学
    • Year and Date
      2008-08-05
    • Related Report
      2008 Final Research Report
  • [Presentation] Fixed-point property of random groups via energy of maps2008

    • Author(s)
      納谷信
    • Organizer
      Geometric Group Theory, Geometric Analysis, and Mapping Class Groups
    • Place of Presentation
      Johns Hopkins University (USA)
    • Year and Date
      2008-05-05
    • Related Report
      2008 Annual Research Report
  • [Presentation] 離散群の固定点性質と多面体の$R^N$への埋め込み2008

    • Author(s)
      納谷信
    • Organizer
      金沢大学談話会
    • Place of Presentation
      金沢大学
    • Year and Date
      2008-03-06
    • Related Report
      2008 Final Research Report
  • [Presentation] Fixed-point property of random groups via energy of maps2008

    • Author(s)
      納谷信
    • Organizer
      Geometric Group Theory, Geometric Analysis, and Mapping Class Groups
    • Place of Presentation
      Johns Hopkins University
    • Related Report
      2008 Final Research Report
  • [Presentation] Fixed-point property of discrete groups via harmonic maps2007

    • Author(s)
      納谷 信
    • Organizer
      International Conference "Variational Problems in Geometry"
    • Place of Presentation
      仙台国際センター
    • Year and Date
      2007-09-19
    • Related Report
      2007 Annual Research Report
  • [Presentation] 固定点性質と同変写像のエネルギー2007

    • Author(s)
      井関裕靖
    • Organizer
      RIMS共同研究「離散群と作用素環論」
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2007-01-09
    • Related Report
      2008 Final Research Report
  • [Presentation] Fixed-point property of discrete groups via harmonic maps2007

    • Author(s)
      納谷信
    • Organizer
      International Conference ``Variational Problems in Geometry"
    • Place of Presentation
      仙台
    • Related Report
      2008 Final Research Report
  • [Presentation] 群の表示から定まるグラフ達 の第1固有値について2007

    • Author(s)
      納谷信
    • Organizer
      福岡大学微分幾何研究集会
    • Place of Presentation
      福岡大学セミナーハウス
    • Related Report
      2008 Final Research Report
  • [Presentation] ボホナー技法と超剛性・固定点定理2007

    • Author(s)
      納谷信
    • Organizer
      研究集会「離散群論と作用素環論」
    • Place of Presentation
      京都大学数理解析研究所
    • Related Report
      2008 Final Research Report
  • [Presentation] Fixed-point property of discrete groups2006

    • Author(s)
      井関裕靖
    • Organizer
      研究集会「大域解析と微分幾何 --- その情報科学への関わり ---」
    • Place of Presentation
      東北大学大学院情報科学研究科
    • Year and Date
      2006-10-22
    • Related Report
      2008 Final Research Report
  • [Presentation] ランダム群に対する固定点定理2006

    • Author(s)
      井関裕靖
    • Organizer
      第49回函数論シンポジウム
    • Place of Presentation
      東京工業大学
    • Year and Date
      2006-09-15
    • Related Report
      2008 Final Research Report
  • [Presentation] Superrigidity and fixed-point property of discrete groups via harmonic maps2006

    • Author(s)
      納谷信
    • Organizer
      第2回日中友好幾何学研究集会
    • Place of Presentation
      雲南師範大学, 昆明, 中国
    • Related Report
      2008 Final Research Report
  • [Presentation] A fixed-point theorem for discrete-group actions on Hadamard spaces2005

    • Organizer
      研究集会「一般・幾何学的トポロジーと幾何学的群論」
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2005-10-12
    • Related Report
      2008 Final Research Report
  • [Presentation] Fixed-point properties of random groups2005

    • Author(s)
      納谷信
    • Organizer
      日中幾何学研究集会
    • Place of Presentation
      唐津市虹の松原ホテル
    • Related Report
      2008 Final Research Report
  • [Book] 位相幾何2006

    • Author(s)
      佐藤 肇
    • Total Pages
      120
    • Publisher
      岩波書店
    • Related Report
      2005 Annual Research Report
  • [Book] 調和写像と剛性, 微分幾何学の最先端----Surveys in Gemometry(中島啓(編著))2005

    • Author(s)
      納谷信
    • Publisher
      培風館
    • Related Report
      2008 Final Research Report
  • [Book] 調和写像と剛性,微分幾何学の最先端(中島啓編)2005

    • Author(s)
      納谷 信
    • Total Pages
      34
    • Publisher
      培風館
    • Related Report
      2005 Annual Research Report

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Published: 2005-04-01   Modified: 2016-04-21  

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