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Study on Geometric group theory

Research Project

Project/Area Number 19340013
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

FUJIWARA Koji  Tohoku University, 大学院・情報科学研究科, 教授 (60229078)

Co-Investigator(Kenkyū-buntansha) 森田 茂之  東京大学, 大学院・数理科学研究科, 教授 (70011674)
塩谷 隆  東北大学, 大学院・理学研究科, 教授 (90235507)
Co-Investigator(Renkei-kenkyūsha) MORITA Shigeyuki  東京大学, 数理科学研究科, 名誉教授 (70011674)
SHIOYA Takashi  東北大学, 大学院・理学研究科, 教授 (90235507)
Project Period (FY) 2007 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2010: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2009: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2008: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2007: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Keywords双曲群 / 写像類群 / 擬準同型 / 漸近次元 / 中心極限定理 / カーブグラフ / 有界コホモロジー / ランプライター群 / interval exchange transformation / 幾何学的群論 / 区間交換群 / 交換子長 / 対称空間 / CAT(0)空間 / 交換子距離 / タイヒミュラー空間
Research Abstract

Hyperbolic group was invented by Gromov in 80's. We aim to use hyperbolicity in broader objects. We constructed many quasi-homomorphisms on Kac-Moody groups. We obtained a first finitely presented, simple group with infinite commutator width (with Caprace). Using quasi-homomorphisms, we characterized rank-1 manifolds among complete Riemann manifold of non-positive curvature of finite volume (with Bestvina).

Report

(6 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report   Self-evaluation Report ( PDF )
  • 2008 Annual Research Report
  • 2007 Annual Research Report
  • Research Products

    (68 results)

All 2011 2010 2009 2008 2007 Other

All Journal Article (29 results) (of which Peer Reviewed: 26 results) Presentation (35 results) Book (2 results) Remarks (2 results)

  • [Journal Article] CAT(0) and CAT(-1) fillings of hyperbolic manifolds.2010

    • Author(s)
      Koji Fujiwara, Jason Fox Manning
    • Journal Title

      Jour Diff Geometry Volume85,Numder2

      Pages: 229-270

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Rank one isometries of buildings and quasi-morphisms of Kac-Moody groups.2010

    • Author(s)
      Pierre-Emmanuel Caprace, Koji Fujiwara
    • Journal Title

      Geom.andFunct.Anal 19,Number5

      Pages: 1296-1319

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Combable functions, quasimorphisms, and the central limit theorem.2010

    • Author(s)
      Danny Calegari, Koji Fujiwara
    • Journal Title

      Ergodic Theory and Dynamical Systems. 30

      Pages: 1343-1369

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Stable commutator length in word-hyperbolic groups.2010

    • Author(s)
      Danny Calegari, K.Fujiwara
    • Journal Title

      Groups, Geometry, and Dynamics. Volume 4, Issue 1

      Pages: 59-90

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Stable commutator length in word-hyperbolic groups.2010

    • Author(s)
      Danny Calegari, K.Fujiwara.
    • Journal Title

      Groups, Geometry, and Dynamics

      Volume: 4 Pages: 59-90

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Combable functions, quasimorphisms, and the central limit theorem2010

    • Author(s)
      Danny Calegari, Koji Fujiwara
    • Journal Title

      Ergodic Theory and Dynamical Systems

      Volume: 30 Pages: 1343-1369

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rank one isometries of buildings and quasi-morphisms of Kac-Moody groups2010

    • Author(s)
      Pierre-Emmanuel Caprace, Koji Fujiwara
    • Journal Title

      Geom.and Funct.Anal

      Volume: 19 Pages: 1296-1319

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] CAT(O) and CAT(1) fillings of hyperbolic manifolds2010

    • Author(s)
      Koji Fujiwara, Jason Fox Manning
    • Journal Title

      Jour.Diff.Geometry

      Volume: 85 Pages: 229-270

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stable commutator length in word-hyperbolic groups2010

    • Author(s)
      Danny Calegari, K. Fujiwara
    • Journal Title

      Groups, Geometry, and Dynamics Volume 4, Issue 1

      Pages: 59-90

    • Related Report
      2009 Self-evaluation Report
  • [Journal Article] Rank one isometries of buildings and quasi-morphisms of Kac-Moody groups2010

    • Author(s)
      Pierre-Emmanuel Caprace, Koji Fujiwara
    • Journal Title

      Geom. and Funct. Anal. 19, Number 5

      Pages: 1296-1319

    • Related Report
      2009 Self-evaluation Report
  • [Journal Article] Rank one isometries of buildings and quasi-morphisms of Kac-Moody groups.2010

    • Author(s)
      Pierre-Emmanuel Caprace, Koji Fujiwara
    • Journal Title

      Geom.and Funct.Anal. 19

      Pages: 1296-1319

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stable commutator length in word-hyperbolic groups.2010

    • Author(s)
      Danny Calegari, K.Fujiwara
    • Journal Title

      Groups, Geometry, and Dynamics 4

      Pages: 59-90

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quasi homomorphisms on mapping class groups2009

    • Author(s)
      K.Fujiwara
    • Journal Title

      Handbook of Teichmuller Theory(EMS) Volume II

      Pages: 241-270

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] A characterization of higher rank symmetric spaces via bounded cohomology.2009

    • Author(s)
      M.Bestvina, K.Fujiwara
    • Journal Title

      Geom.and Funct.Anal 19,no 1

      Pages: 11-40

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Copies of a one-ended group in a Mapping Class Group.2009

    • Author(s)
      Francois Dahmani, Koji Fujiwara
    • Journal Title

      Groups, Geometry, and Dynamics Volume 3, Issue 3

      Pages: 359-377

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] A characterization of higher rank symmetric spaces via bounded cohomology2009

    • Author(s)
      M. Bestvina, K. Fujiwara
    • Journal Title

      Geom. and Funct. Anal. 19, no 1

      Pages: 11-40

    • Related Report
      2009 Self-evaluation Report
  • [Journal Article] Copies of a one-ended group in a Mapping Class Group2009

    • Author(s)
      Francois Dahmani, Koji Fujiwara
    • Journal Title

      Groups, Geometry, and Dynamics 3

      Pages: 359-377

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A characterization of higher rank symmetric spaces via bounded cohomology.2009

    • Author(s)
      M.Bestvina, K.Fujiwara
    • Journal Title

      Geom.and Funct.Anal. 19

      Pages: 11-40

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The asymptotic dimension of a curve graph is finite.2008

    • Author(s)
      G.Bell, K.Fujiwara
    • Journal Title

      J.London Math.Soc 77

      Pages: 33-50

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Subgroups generated by two pseudo-Anosov elements in a mapping class group. I. Uniform exponential growth.2008

    • Author(s)
      K.Fujiwara
    • Journal Title

      Groups of Diffeomorphisms (ASPM)(Mathematical Society of Japan) 52

      Pages: 283-296

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Variational convergence over metric spaces.2008

    • Author(s)
      Kuwae, Kazuhiro, Shioya, Takashi
    • Journal Title

      Trans.Amer.Math.Soc 360 no. 1

      Pages: 35-75

    • NAID

      120003780146

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] extended Johnson homomorphisms, and new cycles on the moduli space of curves.2008

    • Author(s)
      Morita,S., Penner,R.C., Torelli groups
    • Journal Title

      Math.Proc.Cambridge Philos.Soc 144 no.3

      Pages: 651-671

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Subgroups generated by two pseudo-Anosov elements in a mapping class group. I. Uniform exponential growth2008

    • Author(s)
      Koji Fujiwara
    • Journal Title

      "Groups of Diffeomorphisms", Advanced studies of pure math, Mathematical Society of Japan 52

      Pages: 283-296

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The asymptotic dimension of a curve graph is finite2008

    • Author(s)
      G. Bell, K. Fujiwara
    • Journal Title

      J. London Math. Soc 77

      Pages: 33-50

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Variational convergence over metric spaces2008

    • Author(s)
      K. Kuwae, T, Shioya
    • Journal Title

      Trans. AMS 360

      Pages: 35-75

    • NAID

      120003780146

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quasi-homomorphisms on mapping class groups.2007

    • Author(s)
      M.Bestvina, K.Fujiwara
    • Journal Title

      Glasnik Matematicki Vol.42,No.1

      Pages: 213-236

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] A note on spaces of asymptotic dimension one.2007

    • Author(s)
      K.Fujiwara, K.Whyte
    • Journal Title

      Algebraic & Geometric Topology 7

      Pages: 1063-1070

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Characteristic classes of foliated surface bundles with area-preserving holonomy.2007

    • Author(s)
      Kotschick,D., Morita,S
    • Journal Title

      J.Differential Geom 75 no.2

      Pages: 273-302

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Characteristic classes of foliated surface bundles with area-preserving holonomy2007

    • Author(s)
      D. Kotschick, S. Morita
    • Journal Title

      Jour. Diff. Geom 75

      Pages: 273-302

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] Subgroups of interval exchange transformations.2011

    • Author(s)
      Koji Fujiwara
    • Organizer
      Goemetry and Analysis
    • Place of Presentation
      Kyoto
    • Year and Date
      2011-03-18
    • Related Report
      2010 Annual Research Report 2010 Final Research Report
  • [Presentation] The asymptotic dimension of mapping class groups is finite.2010

    • Author(s)
      Koji Fujiwara
    • Organizer
      The geometry of the outer automorphism group of a free group, American Institute of Math
    • Place of Presentation
      PaloAlto, USA
    • Year and Date
      2010-10-29
    • Related Report
      2010 Final Research Report
  • [Presentation] The asymptotic dimension of mapping class groups is finite.2010

    • Author(s)
      Koji Fujiwara
    • Organizer
      The geometry of the outer automorphism group of a free group
    • Place of Presentation
      American Institute of math, PaloAlto, USA
    • Year and Date
      2010-10-29
    • Related Report
      2010 Annual Research Report
  • [Presentation] The asymptotic dimension of mapping class groups is finite.2010

    • Author(s)
      Koji Fujiwara
    • Organizer
      Hyperbolic Geometry and related topics
    • Place of Presentation
      KIAS韓国
    • Year and Date
      2010-09-15
    • Related Report
      2010 Final Research Report
  • [Presentation] The asymptotic dimension of mapping class groups is finite.2010

    • Author(s)
      Koji Fujiwara
    • Organizer
      Hyperbolic Geometry and related topics
    • Place of Presentation
      KIAS, Seoul, Korea
    • Year and Date
      2010-09-15
    • Related Report
      2010 Annual Research Report
  • [Presentation] The asymptotic dimension of mapping class groups is finite.2010

    • Author(s)
      Koji Fujiwara
    • Organizer
      リーマン面に関連する位相幾何学
    • Place of Presentation
      東京大
    • Year and Date
      2010-09-04
    • Related Report
      2010 Annual Research Report 2010 Final Research Report
  • [Presentation] Combable functions and the central limit theorem on discrete groups2010

    • Author(s)
      Koji Fujiwara
    • Organizer
      確率論と幾何学
    • Place of Presentation
      東北大
    • Year and Date
      2010-08-26
    • Related Report
      2010 Annual Research Report 2010 Final Research Report
  • [Presentation] Groups of interval exchange transformations2010

    • Author(s)
      Koji Fujiwara
    • Organizer
      workshop "Geometric Group Theory, Hyperbolic Dynamics and Symplectic Geometry
    • Place of Presentation
      Oberwolfach.Germany
    • Year and Date
      2010-07-16
    • Related Report
      2010 Final Research Report
  • [Presentation] Groups of interval exchange transformations.2010

    • Author(s)
      Koji Fujiwara
    • Organizer
      workshop "Geometric Group Theory, Hyper bolic Dynamics and Symplectic Geometry"
    • Place of Presentation
      Oberwolfach, Germany
    • Year and Date
      2010-07-16
    • Related Report
      2010 Annual Research Report
  • [Presentation] Groups of interval exchange transformations.2010

    • Author(s)
      Koji Fujiwara
    • Organizer
      Workshop : Subgroups of mapping class groups, Hausdorff Institute of Math
    • Place of Presentation
      Bonn, Germany
    • Year and Date
      2010-05-06
    • Related Report
      2010 Final Research Report
  • [Presentation] Groups of interval exchange transformations.2010

    • Author(s)
      Koji Fujiwara
    • Organizer
      Workshop : Subgroups of mapping class groups
    • Place of Presentation
      Hausdorff Institute of Math,Bonn, Germany.
    • Year and Date
      2010-05-06
    • Related Report
      2010 Annual Research Report
  • [Presentation] The asymptotic dimension of mapping class groups is finite2009

    • Author(s)
      Koji Fujiwara
    • Organizer
      2009 Joint Meeting of KMS and AMS
    • Place of Presentation
      Ewha Womans University, Seoul, Korea
    • Year and Date
      2009-12-16
    • Related Report
      2009 Annual Research Report
  • [Presentation] Subgroups in the group of interval exchange transformations.2009

    • Author(s)
      Koji Fujiwara
    • Organizer
      Kias Workshop on Geometric Structures and Geometric Group Theory
    • Place of Presentation
      KIAS, Korea
    • Year and Date
      2009-12-15
    • Related Report
      2010 Final Research Report
  • [Presentation] Subgroups in the group of interval exchange transformations2009

    • Author(s)
      Koji Fujiwara
    • Organizer
      Kias Workshop on Geometric Structures and Geometric Group Theory
    • Place of Presentation
      KIAS,ソウル、韓国
    • Year and Date
      2009-12-15
    • Related Report
      2009 Annual Research Report
  • [Presentation] The asymptotic dimension of mapping class groups is finite.2009

    • Author(s)
      Koji Fujiwara
    • Organizer
      群と力学系に関わる離散幾何学
    • Place of Presentation
      愛媛大学
    • Year and Date
      2009-09-02
    • Related Report
      2010 Final Research Report 2009 Annual Research Report
  • [Presentation] CAT(0) and CAT(-1) fillings of hyperbolic manifolds2009

    • Author(s)
      Koji Fujiwara
    • Organizer
      Davis 60
    • Place of Presentation
      Bedlewo, Poland
    • Year and Date
      2009-06-17
    • Related Report
      2010 Final Research Report
  • [Presentation] CAT(0) and CAT(-1)fillings of hyperbolic manifolds2009

    • Author(s)
      Koji Fujiwara
    • Organizer
      Davis 60
    • Place of Presentation
      ポーランド、ベトレボ
    • Year and Date
      2009-06-17
    • Related Report
      2009 Annual Research Report
  • [Presentation] The asymptotic dimension of mapping class groups is finite2009

    • Author(s)
      藤原耕二
    • Organizer
      Groups, embeddings and applications
    • Place of Presentation
      19-22.3.2009. U of Hawaii. USA.
    • Year and Date
      2009-03-19
    • Related Report
      2009 Self-evaluation Report
  • [Presentation] The asymptotic dimension of mapping class groups is finite2009

    • Author(s)
      Koji Fujiwara
    • Organizer
      "Groups, embeddings and applications", 19-22. 3. 2009.
    • Place of Presentation
      U of Hawaii. USA
    • Year and Date
      2009-03-19
    • Related Report
      2008 Annual Research Report
  • [Presentation] CAT(0) and CAT(-1) fillings of hyperbolic manifolds.2009

    • Author(s)
      Koji Fujiwara
    • Organizer
      リーマン幾何と幾何解析
    • Place of Presentation
      筑波大学
    • Year and Date
      2009-02-20
    • Related Report
      2010 Final Research Report
  • [Presentation] CAT(0) and CAT(-1) fillings of hyperbolic manifolds2009

    • Author(s)
      Koji Fujiwara
    • Organizer
      リーマン幾何と幾何解析
    • Place of Presentation
      筑波大学
    • Year and Date
      2009-02-20
    • Related Report
      2008 Annual Research Report
  • [Presentation] The asymptotic dimension of mapping class groups is finite.2009

    • Author(s)
      Koji Fujiwara
    • Organizer
      Session "Geometric Structures and Geometric Group Theory", 2009 Joint Meeting of KMS and AMS
    • Place of Presentation
      Ewha Womans University, Seoul, Korea
    • Related Report
      2010 Final Research Report
  • [Presentation] The asymptotic dimension of mapping class groups is finite.2009

    • Author(s)
      Koji Fujiwara
    • Organizer
      Groups, embeddings and applications
    • Place of Presentation
      U of Hawaii.USA
    • Related Report
      2010 Final Research Report
  • [Presentation] Central limit theorem for combable functions on groups2008

    • Author(s)
      Koji Fujiwara
    • Organizer
      Topology and computer 2008,
    • Place of Presentation
      Tokyo Tech
    • Year and Date
      2008-08-28
    • Related Report
      2008 Annual Research Report
  • [Presentation] Schottky subgroups in mapping class groups.2008

    • Author(s)
      Koji Fujiwara
    • Organizer
      Nonpositive curvature and the elementary theory of free groups
    • Place of Presentation
      Anogia, Greece
    • Year and Date
      2008-06-11
    • Related Report
      2010 Final Research Report
  • [Presentation] Schottky subgroups in mapping class groups2008

    • Author(s)
      Koji Fujiwara
    • Organizer
      Nonpositive curvature and the elementary theory of free groups
    • Place of Presentation
      Anogia, Greece
    • Year and Date
      2008-06-11
    • Related Report
      2008 Annual Research Report
  • [Presentation] Combable functions and the central limit theorem2008

    • Author(s)
      Koji Fujiwara
    • Organizer
      Geometric Group Theory, Hyperbolic Dynamics and Symplectic Geometry
    • Place of Presentation
      Oberwolfach, Germany
    • Related Report
      2010 Final Research Report 2008 Annual Research Report
  • [Presentation] Central limit theorem for combable functions on groups.2008

    • Author(s)
      Koji Fujiwara
    • Organizer
      Topology and computer 2008
    • Place of Presentation
      Tokyo Tech
    • Related Report
      2010 Final Research Report
  • [Presentation] Rank-1 isometries on CAT(0) spaces and quasi-homomorphisms2007

    • Author(s)
      Koji Fujiwara
    • Organizer
      Topics in Geometric Group Theory
    • Place of Presentation
      MSRI, USA
    • Year and Date
      2007-11-06
    • Related Report
      2010 Final Research Report
  • [Presentation] Rank-1 isometries on CAT(0) spaces and quasi-homomorphisms2007

    • Author(s)
      藤原耕二
    • Organizer
      in Topics in Geometric Group Theory
    • Place of Presentation
      at MSRI, USA.
    • Year and Date
      2007-11-06
    • Related Report
      2009 Self-evaluation Report
  • [Presentation] Rank-1 isometries on CAT(0) spaces and quasi-homomorphisms2007

    • Author(s)
      Koji fujiwara
    • Organizer
      Topics in Geometric Group Theory
    • Place of Presentation
      MSRI, Berkeley, USA
    • Year and Date
      2007-11-06
    • Related Report
      2007 Annual Research Report
  • [Presentation] 双曲性と擬準同型2007

    • Author(s)
      Koji Fujiwara
    • Organizer
      第54回幾何学シンポジウム
    • Place of Presentation
      鹿児島大学.
    • Year and Date
      2007-08-26
    • Related Report
      2010 Final Research Report
  • [Presentation] 双曲性と擬準同型2007

    • Author(s)
      Koji fujiwara
    • Organizer
      第54回幾何学シンポジウム
    • Place of Presentation
      鹿児島大
    • Year and Date
      2007-08-26
    • Related Report
      2007 Annual Research Report
  • [Presentation] Hyperbolicity, quasi-homomorphisms and stable commutator length.2007

    • Author(s)
      Koji Fujiwara
    • Organizer
      Hyperbolic structures on 3-manifolds and large scale geometry of Teichmuller space
    • Place of Presentation
      Univ of Warwick,英国
    • Year and Date
      2007-07-18
    • Related Report
      2010 Final Research Report
  • [Presentation] Hyperbolicity, quasi-homomorphisms and stable commutator length2007

    • Author(s)
      Koji fujiwara
    • Organizer
      Hyperbolic structures on 3-manifolds and large scale geometry of Teichmuller space
    • Place of Presentation
      U Warwick, UK
    • Year and Date
      2007-07-18
    • Related Report
      2007 Annual Research Report
  • [Book] Handbook of Teichmuller Theory, Volume II2009

    • Author(s)
      Koji Fujiwara, et al
    • Total Pages
      883
    • Publisher
      European Math Society
    • Related Report
      2009 Annual Research Report
  • [Book] Handbook of Teichmuller theory. Vol. I2007

    • Author(s)
      S. Morita, etal.
    • Total Pages
      802
    • Publisher
      European Math Society
    • Related Report
      2007 Annual Research Report
  • [Remarks] ホームページ等

    • Related Report
      2010 Final Research Report
  • [Remarks]

    • URL

      http://www.math.is.tohoku.ac.Jp/-furiwara

    • Related Report
      2010 Annual Research Report

URL: 

Published: 2007-04-01   Modified: 2016-04-21  

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