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Automorphisms of groups and limit elements

Research Project

Project/Area Number 23654019
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Geometry
Research InstitutionKyoto University (2012)
Tohoku University (2011)

Principal Investigator

FUJIWARA Koji  京都大学, 理学研究科, 教授 (60229078)

Project Period (FY) 2011 – 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords微分幾何 / 微分トポロジー / 群論 / 幾何学 / トポロジー / タイヒミュラー空間 / 増大度 / 無限離散群
Research Abstract

I studied the group of interval exchange transformations, IET. In a joint work with Guirardel and Dahmani, we proved many new results including that any subgroup in IET that is isomorphic to a Lie group is abelian. This is an unexpected result. I also studied the Funk metric on Teichmuller space, and obtained a number of interesting results. My study shows that the Funk metric on Teichmuller space is very different from the original Funk metric for a convex domain in a Euclidean space, and opened a new direction of the study on the Funk metric on a space which has negative curvature.

Report

(3 results)
  • 2012 Annual Research Report   Final Research Report ( PDF )
  • 2011 Research-status Report
  • Research Products

    (37 results)

All 2013 2012 2011 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (32 results) (of which Invited: 9 results)

  • [Journal Article] Geometry of the Funk metric on Weil-Petersson spaces2013

    • Author(s)
      Koji Fujiwara
    • Journal Title

      Math. Z

      Volume: 274(1-2) Issue: 1-2 Pages: 647-665

    • DOI

      10.1007/s00209-012-1089-6

    • Related Report
      2012 Annual Research Report 2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Random groups have fixed points on CAT(0) cube complexes2012

    • Author(s)
      Koji Fujiwara, Tetsu Toyoda
    • Journal Title

      Proc. Amer. Math. Soc

      Volume: 140, Number 3 Pages: 1023-1031

    • Related Report
      2012 Annual Research Report 2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Random groups have fixed points on CAT(0) cube complexes2012

    • Author(s)
      Koji Fujiwara, Tetsu Toyoda
    • Journal Title

      Proc. Amer. Math. Soc.

      Volume: 140 Pages: 1023-1031

    • Related Report
      2011 Research-status Report
    • Peer Reviewed
  • [Journal Article] Jason Fox Manning. Simplicial volume and fillings of hyperbolic manifolds2011

    • Author(s)
      Koji Fujiwara
    • Journal Title

      Algebraic & Geometric Topology.

      Volume: 11 Pages: 2237-2264

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Simplicial volume and fillings of hyperbolic manifolds.2011

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

      Algebraic & Geometric Topology.

      Volume: 11 Pages: 2237-2264

    • Related Report
      2011 Research-status Report
    • Peer Reviewed
  • [Presentation] Group actions on quasi-trees and its application2013

    • Organizer
      "semester program on Teichmueler Theory ", Erwin Schroeinger International Institute for Mathematical Physics
    • Place of Presentation
      Vienna, Austria
    • Year and Date
      2013-02-14
    • Related Report
      2012 Final Research Report
  • [Presentation] Quasi-morphisms and its application2013

    • Organizer
      Kervaire Seminar "Geometry of groups 2013
    • Place of Presentation
      Les Diablerets, Switzerland
    • Related Report
      2012 Final Research Report
  • [Presentation] Quasi-homomorphisms2012

    • Organizer
      Doctoral Forum of Mathematics between Fudan and Kyoto Universities
    • Place of Presentation
      Kyoto.
    • Year and Date
      2012-12-12
    • Related Report
      2012 Final Research Report
  • [Presentation] Group actions on quasi-trees.2012

    • Organizer
      "Cohomological methods in Goemetric group theory". Banff International Research Station
    • Place of Presentation
      Banff, Canada
    • Year and Date
      2012-11-29
    • Related Report
      2012 Final Research Report
  • [Presentation] Negative curvature in discrete groups2012

    • Organizer
      第18回複素幾何シンポジウム
    • Place of Presentation
      菅平
    • Year and Date
      2012-10-25
    • Related Report
      2012 Final Research Report
  • [Presentation] Stable commutator length on mapping class groups2012

    • Organizer
      Oberseminar
    • Place of Presentation
      MPI Bonn, Germany.
    • Year and Date
      2012-09-27
    • Related Report
      2012 Final Research Report
  • [Presentation] Group actions on quasi-trees2012

    • Organizer
      Discrete Geometric Analysis, RIMS
    • Place of Presentation
      Kyoto.
    • Year and Date
      2012-08-29
    • Related Report
      2012 Final Research Report
  • [Presentation] Quasi-cocycles on free groups to uniformly convex Banach spaces2012

    • Organizer
      Geometric and combinatorial group theory with applications (GAGTA-6)
    • Place of Presentation
      Dusseldorf, Germany
    • Year and Date
      2012-08-02
    • Related Report
      2012 Final Research Report
  • [Presentation] Quasi-cocycles on free groups to uniformly convex Banach spaces2012

    • Organizer
      Symplecctic geometry, geometric group theory and dynamics
    • Place of Presentation
      Obervolfach, Germany
    • Year and Date
      2012-07-16
    • Related Report
      2012 Final Research Report
  • [Presentation] Quasi-cocycles on free groups to uniformly convex Banach spaces2012

    • Organizer
      Conference on Geometry
    • Place of Presentation
      RIMS, Kyoto
    • Year and Date
      2012-05-28
    • Related Report
      2012 Final Research Report
  • [Presentation] Quasi-trees and quasi-cocycles2012

    • Organizer
      Topology and functional analysis
    • Place of Presentation
      Fudan University, Shanghai, China
    • Year and Date
      2012-05-23
    • Related Report
      2012 Final Research Report
  • [Presentation] Growth of groups2012

    • Organizer
      Intelligence of Low-dimensional Topology
    • Place of Presentation
      RIMS, Kyoto
    • Year and Date
      2012-05-17
    • Related Report
      2012 Final Research Report
  • [Presentation] Quasi-cocycles on free groups to uniform convex Banach spaces2012

    • Organizer
      Mittag-Leffler Institut
    • Place of Presentation
      Sweden.
    • Year and Date
      2012-04-24
    • Related Report
      2012 Final Research Report
  • [Presentation] Group actions on quasi-trees (3 lectures)2012

    • Organizer
      The 10th KAIST Geometric Topology Fair
    • Place of Presentation
      Korea.
    • Related Report
      2012 Final Research Report
  • [Presentation] Group actions on quasi-trees2012

    • Organizer
      Rigidity School
    • Place of Presentation
      Univ Tokyo
    • Related Report
      2012 Final Research Report
  • [Presentation] Group actions on quasi-trees (3 lectures).2012

    • Author(s)
      Koji Fujiwara
    • Organizer
      The 10th KAIST Geometric Topology Fair
    • Place of Presentation
      Korea.
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Simplicial volume and fillings of hyperbolic manifolds2011

    • Organizer
      Topics in Topology, Max Planck Institute
    • Place of Presentation
      Bonn, Germany
    • Year and Date
      2011-09-17
    • Related Report
      2012 Final Research Report
  • [Presentation] Group actions on quasi-trees and quasi-cocycles2011

    • Organizer
      "Geometric and measured group theory", Institut Henri Poincare
    • Place of Presentation
      Paris, France
    • Year and Date
      2011-07-08
    • Related Report
      2012 Final Research Report
  • [Presentation] Simplicial volume and fillings of hyperbolic manifolds2011

    • Organizer
      Dubrovnik VII -- Geometric Topology
    • Place of Presentation
      Dubrobnik, Croatia
    • Year and Date
      2011-06-27
    • Related Report
      2012 Final Research Report
  • [Presentation] Subgroups of interval exchange transformations2011

    • Organizer
      Geometric Group Theory
    • Place of Presentation
      Technion, Haifa, Israel
    • Year and Date
      2011-06-22
    • Related Report
      2012 Final Research Report
  • [Presentation] Subgroups of interval exchange transformations.2011

    • Organizer
      Theorie Geometrique des Groupes
    • Place of Presentation
      U Paris Sud (Orsay)
    • Year and Date
      2011-05-13
    • Related Report
      2012 Final Research Report
  • [Presentation] Quasi-homomorphisms on groups and rank-rigidity2011

    • Organizer
      Bonner Geometrietage (Ballmann's 60th birthday conference)
    • Place of Presentation
      MPI in Bonn
    • Year and Date
      2011-04-12
    • Related Report
      2012 Final Research Report
  • [Presentation] Subgroups of interval exchange transformations2011

    • Author(s)
      Koji Fujiwara
    • Organizer
      "Geometric Group Theory"(招待講演)
    • Place of Presentation
      Technion, Haifa, Israel.
    • Related Report
      2011 Research-status Report
  • [Presentation] Simplicial volume and fillings of hyperbolic manifolds.2011

    • Author(s)
      Koji Fujiwara
    • Organizer
      "Dubrovnik VII -- Geometric Topology"(招待講演)
    • Place of Presentation
      Dubrobnik, Croatia.
    • Related Report
      2011 Research-status Report
  • [Presentation] Growth of groups

    • Author(s)
      Koji Fujiwara
    • Organizer
      Intelligence of Low-dimensional Topology
    • Place of Presentation
      RIMS, Kyoto.
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Quasi-trees and quasi-cocycles

    • Author(s)
      Koji Fujiwara
    • Organizer
      Topology and functional analysis
    • Place of Presentation
      Fudan University, Shanghai, China.
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Quasi-cocycles on free groups to uniformly convex Banach spaces

    • Author(s)
      Koji Fujiwara
    • Organizer
      Conference on Geometry
    • Place of Presentation
      RIMS, Kyoto
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Quasi-cocycles on free groups to uniformly convex Banach spaces

    • Author(s)
      Koji Fujiwara
    • Organizer
      Symplecctic geometry, geometric group theory and dynamics
    • Place of Presentation
      Obervolfach, Germany.
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Quasi-cocycles on free groups to uniformly convex Banach spaces

    • Author(s)
      Koji Fujiwara
    • Organizer
      Geometric and combinatorial group theory with applications (GAGTA-6)
    • Place of Presentation
      Dusseldorf, Germany
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Group actions on quasi-trees

    • Author(s)
      Koji Fujiwara
    • Organizer
      Discrete Geometric Analysis
    • Place of Presentation
      RIMS, Kyoto.
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Negative curvature in discrete groups

    • Author(s)
      Koji Fujiwara
    • Organizer
      第18回複素幾何シンポジウム
    • Place of Presentation
      菅平
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Group actions on quasi-trees.

    • Author(s)
      Koji Fujiwara
    • Organizer
      Cohomological methods in Goemetric group theory
    • Place of Presentation
      Banff International Research Station, Banff, Canada.
    • Related Report
      2012 Annual Research Report
    • Invited

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Published: 2011-08-05   Modified: 2019-07-29  

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