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2016 Fiscal Year Annual Research Report

New developments in infinite groups and geometry

Research Project

Project/Area Number 24224002
Research InstitutionThe University of Tokyo

Principal Investigator

坪井 俊  東京大学, 大学院数理科学研究科, 教授 (40114566)

Co-Investigator(Kenkyū-buntansha) 河澄 響矢  東京大学, 大学院数理科学研究科, 准教授 (30214646)
足助 太郎  東京大学, 大学院数理科学研究科, 准教授 (30294515)
大島 利雄  城西大学, 理学部, 教授 (50011721)
藤原 耕二  京都大学, 理学研究科, 教授 (60229078)
大鹿 健一  大阪大学, 理学研究科, 教授 (70183225)
小林 俊行  東京大学, 大学院数理科学研究科, 教授 (80201490)
小島 定吉  東京工業大学, 情報理工学院, 教授 (90117705)
Project Period (FY) 2012-05-31 – 2017-03-31
Keywords無限群 / 幾何学 / 空間形 / 多様体 / 微分同相群 / 力学系 / 写像類群 / 野性的空間
Outline of Annual Research Achievements

[空間形と無限群]について、小島、大鹿、小林、大島、金井、森吉、松田のグループで、[多様体の微分同相群]について、坪井、小林、足助、大島、松元、森田、森吉、高村のグループで、[曲面の写像類群]について、大鹿、藤原、河澄、足助、森田、皆川のグループで、[無限群の力学系的不変量]について、坪井、松元、金井、中山、林、野田、皆川、浅岡、児玉のグループで、[無限群と野生的空間]について、小島、大鹿、藤原、河澄、中山、林、浅岡のグループで共同研究を行った。研究支援員を11名雇用し、最終年度の研究を行った。
7月に「幾何学とインターネットの数理2015」研究集会、10月に「葉層構造と微分同相群2016研究集会」を開催し、連携研究者と研究成果の交流をおこなうとともに、今後の研究について検討した。12月に研究集会 「リーマン面の幾何の展開」および「複素解析的ベクトル場・葉層構造とその周辺」研究集会を共催した。6月に本研究のアウトリーチとして研究員の研究成果をジャーナリストに説明する集会を開催した。7月にポーランドで開催されたFOLIATIONS 2016において、足助太郎、松田能文、松本重則、丸橋広和が葉層構造に関係する研究成果を発表した。研究代表者は、10月~11月にスタンフォード大学で研究成果を発表した。
小島定吉は擬アノソフ型の曲面の自己同型のエントロピーと写像トーラスの双曲体積の比についての結果を出版した。大鹿健一はThurstonの「double limit theoremのSchottky空間版をの構成」問題を完全解決した。河澄響矢は共同研究者とともにゴールドマン・トゥラエフ・リー双代数を用いて任意のコンパクト曲面について柏原ヴェルニュ問題を定式化し、トゥラエフ余括弧積に由来するジョンソン準同型像の制約条件が、榎本佐藤トレースによるものと同値であることを示した。これらを含め、分担者、連携研究者の研究成果が数多く発表、出版された。

Research Progress Status

28年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

28年度が最終年度であるため、記入しない。

  • Research Products

    (38 results)

All 2017 2016

All Journal Article (14 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 13 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (24 results) (of which Int'l Joint Research: 16 results,  Invited: 23 results)

  • [Journal Article] Higher genus Kashiwara-Vergne problems and the Goldman-Turaev Lie bialgebra2017

    • Author(s)
      A. Alekseev, N.Kawazumi, Y. Kuno and F. Naef
    • Journal Title

      C. R. Acad. Sci. Paris, Ser. I

      Volume: 355 Pages: 123-127

    • DOI

      10.1016/j.crma.2016.12.007

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Notes on `Infinitesimal derivative of the Bott class and the Schwarzian derivatives'2017

    • Author(s)
      Taro Asuke
    • Journal Title

      Tohoku Math. J.

      Volume: 69 Pages: 129-139

    • Peer Reviewed
  • [Journal Article] Reducibility of hypergeometric equations2017

    • Author(s)
      T. Oshima
    • Journal Title

      Analytic, Algebraic and Geometric Aspects of Differential Equations, Trends in Mathematics

      Volume: - Pages: -

    • DOI

      10.1007/978-3-319-52842-7_14

  • [Journal Article] Measurable Rigidity for Kleinian groups2016

    • Author(s)
      Woojin Jeon, Ken’ichi Ohshika
    • Journal Title

      Ergod. Th. Dyn. Sys.

      Volume: 36 Pages: 2498-2511

    • DOI

      10.1017/etds.2015.15

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Subgroups of mapping class groups related to Heegaard splittings and bridge decompositions2016

    • Author(s)
      Ken’ichi Ohshika, Makoto Sakuma
    • Journal Title

      Geometriae Dedicata

      Volume: 180 Pages: 117-134

    • DOI

      10.1007/s10711-015-0094-4

    • Peer Reviewed
  • [Journal Article] Convergence of freely decomposable Kleinian groups2016

    • Author(s)
      Inkang Kim, Cyril Lecuire, Ken’ichi Ohshika
    • Journal Title

      Inventiones Mathematicae

      Volume: 201 Pages: 83-131

    • DOI

      10.1007/s00222-015-0609-5

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Conical limit points and the Cannon-Thurston map2016

    • Author(s)
      Woojin Jeon, Illya Kapovich,Christopher Leninger, Ken’ichi Ohshika
    • Journal Title

      Conformal Geometry and Dynamics

      Volume: 20 Pages: 58-80

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Intrinsic sound of anti-de Sitter manifolds2016

    • Author(s)
      T. Kobayashi
    • Journal Title

      Springer Proceedings in Mathematics & Statistics

      Volume: 191 Pages: 83-99

    • DOI

      10.1007/978-981-10-2636-2_6

    • Peer Reviewed
  • [Journal Article] Conformal Symmetry Breaking Operators for Differential Forms on Spheres2016

    • Author(s)
      T. Kobayashi, T. Kubo, and M. Pevzner
    • Journal Title

      Lecture Notes in Mathematics.

      Volume: 2170 Pages: -

    • DOI

      10.1007/978-981-10-2657-7

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Classification of differential symmetry breaking operators for differential forms2016

    • Author(s)
      T. Kobayashi, T. Kubo, and M. Pevzner
    • Journal Title

      C. R. Acad. Sci. Paris, Ser.I,

      Volume: 354 Pages: 671-676

    • DOI

      10.1016/j.crma.2016.04.012

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Bounded cohomology with coefficients in uniformly convex Banach spaces2016

    • Author(s)
      Bestvina, Mladen; Bromberg, Ken; Fujiwara, Koji
    • Journal Title

      Comment. Math. Helv.

      Volume: 91 Pages: 203-218

    • DOI

      DOI 10.4171/CMH/383

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Stable commutator length on mapping class groups.2016

    • Author(s)
      Bestvina, Mladen; Bromberg, Ken; Fujiwara, Koji
    • Journal Title

      Ann. Inst. Fourier

      Volume: 66 Pages: 871-898

    • DOI

      10.5802/aif.3028

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On quasihomomorphisms with noncommutative targets2016

    • Author(s)
      Fujiwara, Koji; Kapovich, Michael
    • Journal Title

      Geom. Funct. Anal.

      Volume: 26 Pages: 478-519

    • DOI

      0.1007/s00039-016-0364-9

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Drawing Curves2016

    • Author(s)
      T. Oshima
    • Journal Title

      Mathematics for Industry

      Volume: 24 Pages: 95-106

    • Peer Reviewed
  • [Presentation] The Kashiwara-Vergne problem and the Goldman-Turaev Lie bialgebra in genus zero2017

    • Author(s)
      N. Kawazumi
    • Organizer
      Low dimensional topology and number theory IX
    • Place of Presentation
      九州大学 AiRIMaQ
    • Year and Date
      2017-03-06
    • Int'l Joint Research / Invited
  • [Presentation] Deformation spaces of Kleinian groups and what are continuous and discontinuous there2017

    • Author(s)
      Ken'ichi Ohshika
    • Organizer
      Moduli spaces and applications in geometry, topology, analysis and mathematical physics
    • Place of Presentation
      Morningside Center of Mathematics, Chinese Academy of Science, Beijing, China
    • Year and Date
      2017-02-27
    • Int'l Joint Research / Invited
  • [Presentation] Differential forms and functions on the moduli space of Riemann surfaces2017

    • Author(s)
      N. Kawazumi
    • Organizer
      Seminaire Algebre et topologie,
    • Place of Presentation
      IRMA, Universite de Strasbourg.
    • Year and Date
      2017-01-30
    • Int'l Joint Research / Invited
  • [Presentation] Conformal Geometry and Branching Problems in Representation Theory2016

    • Author(s)
      T. Kobayashi
    • Organizer
      Symposium on Representation Theory 2016
    • Place of Presentation
      Okinawa, Japan
    • Year and Date
      2016-11-29 – 2016-12-02
    • Int'l Joint Research / Invited
  • [Presentation] Some tensor field on the Teichmuller space2016

    • Author(s)
      N. Kawazumi
    • Organizer
      Seminaire `Groupes de Lie et espaces des modules’
    • Place of Presentation
      Section de mathematiques, Universite de Geneve
    • Year and Date
      2016-11-01
    • Invited
  • [Presentation] Old and New problems on diffeomorphism groups2016

    • Author(s)
      Takashi Tsuboi
    • Organizer
      Distinguished Lecture Series, Stanford University
    • Place of Presentation
      Stanford University
    • Year and Date
      2016-10-27 – 2016-11-14
    • Invited
  • [Presentation] Normalized entropy versus volume for pseudo-Anosovs2016

    • Author(s)
      小島定吉
    • Organizer
      京都大学数学教室談話会
    • Place of Presentation
      京都大学
    • Year and Date
      2016-10-26
    • Invited
  • [Presentation] Some tensor field on the Teichmuller space2016

    • Author(s)
      N. Kawazumi
    • Organizer
      OIST workshop: MCM2016
    • Place of Presentation
      沖縄科学技術大学院大学
    • Year and Date
      2016-10-25
    • Int'l Joint Research / Invited
  • [Presentation] The Kashiwara-Vergne problem and the Goldman-Turaev Lie bialgebra in genus zero2016

    • Author(s)
      N. Kawazumi
    • Organizer
      Pre-conference MCM2016
    • Place of Presentation
      東京大学大学院数理科学研究科
    • Year and Date
      2016-10-20
    • Int'l Joint Research / Invited
  • [Presentation] 数式処理による線型代数や微積分の問題と解法の作成2016

    • Author(s)
      大島利雄
    • Organizer
      数学ソフトウェアとその効果的教育利用に関する研究,
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2016-09-29
    • Invited
  • [Presentation] Birth of New Branching Problems2016

    • Author(s)
      T. Kobayashi
    • Organizer
      MSJ Autumn Meeting 2016
    • Place of Presentation
      Kansai University, Japan
    • Year and Date
      2016-09-15 – 2016-09-18
    • Invited
  • [Presentation] Hyperbolic-like behaviour of groups2016

    • Author(s)
      Koji Fujiwara
    • Organizer
      Introductory Workshop: Geometric Group Theory.
    • Place of Presentation
      MSRI. Berkeley. USA
    • Year and Date
      2016-08-22
    • Int'l Joint Research / Invited
  • [Presentation] Geometric realisation for degenerations of hyperbolic structures2016

    • Author(s)
      Ken'ichi Ohshika
    • Organizer
      Workshop on Moduli Spaces of Geometric Structures
    • Place of Presentation
      IMS, National University of Singapore, Singapore
    • Year and Date
      2016-08-18
    • Int'l Joint Research / Invited
  • [Presentation] Quasi-homomorphisms into non-commutative groups2016

    • Author(s)
      Koji Fujiwara
    • Organizer
      Rigidity School
    • Place of Presentation
      Nagoya U.
    • Year and Date
      2016-07-29
    • Invited
  • [Presentation] Acylindrically hyperbolic groups are not invariably generated2016

    • Author(s)
      Koji Fujiwara
    • Organizer
      Rigidity School
    • Place of Presentation
      Nagoya U.
    • Year and Date
      2016-07-28
    • Invited
  • [Presentation] The Kashiwara- Vergne problem and the Goldman-Turaev Lie bialgebra, I2016

    • Author(s)
      N. Kawazumi
    • Organizer
      Workshop on Grothendieck-Teichmueller Theories
    • Place of Presentation
      Chern Institute of Mathematics, Nankai University. (中国)
    • Year and Date
      2016-07-28
    • Int'l Joint Research / Invited
  • [Presentation] Reduction of boundaries of Teichmuller spaces2016

    • Author(s)
      Ken'ichi Ohshika
    • Organizer
      Workshop on Grothendieck-Teichmuller Theories
    • Place of Presentation
      Chern Institute of Mathematics, Nankai University, Tianjin, China
    • Year and Date
      2016-07-25
    • Int'l Joint Research / Invited
  • [Presentation] Conformally Covariant Symmetry Breaking Operators on Differential Forms and Some Applications2016

    • Author(s)
      T. Kobayashi
    • Organizer
      Conference on Geometry, Representation Theory and the Baum-Connes Conjecture
    • Place of Presentation
      The Fields Institute, Toronto, Ontario, Canada
    • Year and Date
      2016-07-18 – 2016-07-22
    • Int'l Joint Research / Invited
  • [Presentation] A Chern-Weil construction for derivatives of characteristic classes2016

    • Author(s)
      Taro Asuke
    • Organizer
      Foliations 2016
    • Place of Presentation
      Bedlewo (Poland)
    • Year and Date
      2016-07-16
    • Int'l Joint Research / Invited
  • [Presentation] Acylindrically hyperbolic groups are not invariably generated2016

    • Author(s)
      Koji Fujiwara
    • Organizer
      Geometric Topology Fair in Korea
    • Place of Presentation
      Kaist, Deajeon. Korea. Yes
    • Year and Date
      2016-07-06 – 2016-07-08
    • Int'l Joint Research / Invited
  • [Presentation] KZ型超幾何系の変換と解析,2016

    • Author(s)
      大島利雄
    • Organizer
      表現論と非可換調和解析をめぐる諸問題
    • Place of Presentation
      京都大学数理解析研究所,
    • Year and Date
      2016-06-30
  • [Presentation] Global Geometry and Analysis on Locally Symmetric Spaces with Indefinite-metric2016

    • Author(s)
      T. Kobayashi
    • Organizer
      Analysis on Manifolds with Symmetries and Related Structures
    • Place of Presentation
      University of Bath, UK
    • Year and Date
      2016-06-28 – 2016-06-29
    • Int'l Joint Research / Invited
  • [Presentation] Branching Problems and Symmetry Breaking Operators2016

    • Author(s)
      T. Kobayashi
    • Organizer
      Journees SL2R (Strasbourg, Lorraine, Luxembourg, Reims): Theorie des Representations et Analyse Harmonique
    • Place of Presentation
      Institut Elie Cartan de Lorraine, France
    • Year and Date
      2016-06-09 – 2016-06-10
    • Int'l Joint Research / Invited
  • [Presentation] 3-manifolds fibring over the circle: from Poincare’s Analysis Situs to today2016

    • Author(s)
      Ken'ichi Ohshika
    • Organizer
      Autour de Poincare, 86eme rencontre entre les mathematiciens et les physiciens theoriques
    • Place of Presentation
      IRMA Universite de Strasbourg
    • Year and Date
      2016-06-04
    • Int'l Joint Research / Invited

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Published: 2018-01-16  

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