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2010 Fiscal Year Self-evaluation Report

Cohomology of discrete groups and characteristic classes of flat bundles

Research Project

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Project/Area Number 20340008
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

AKITA Toshiyuki  Hokkaido University, 大学院・理学研究院, 准教授 (30279252)

Project Period (FY) 2008 – 2011
Keywordsコホモロジー / 特性類 / 線型表現 / Mackey 函手
Research Abstract

離散群の有限次元線型表現が与えられると、離散群の分類空間上に平坦束が定まる。分類空間のコホモロジーは群のコホモロジーと一致するので、平坦束の特性類は群のコホモロジー類を定める。本研究では離散群のコホモロジーとの関わりに焦点をしぼり、分類空間の平坦束の特性類の性質を明らかにすること、得られた結果を具体的な群のコホモロジーの計算・コホモロジー類の構成などに応用する。

  • Research Products

    (10 results)

All 2011 2010 2009 2008

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

  • [Journal Article] Periodicity for Mumford-Morita-Miller classes of surface symmetries2011

    • Author(s)
      Toshiyuki Akita
    • Journal Title

      Publ.RIMS Kyoto Univ. 印刷中

    • Peer Reviewed
  • [Journal Article] On Kontsevich's characteristic classes for higher-dimensional sphere bundles. II. Higher classes.2009

    • Author(s)
      Tadayuki Watanabe
    • Journal Title

      J.Topol. 2

      Pages: 624-660

    • Peer Reviewed
  • [Journal Article] Integral Riemann-Roch formulae for cyclic subgroups of mapping class groups2008

    • Author(s)
      Toshiyuki Akita, Nariya Kawazumi
    • Journal Title

      Math.Proc.Cambridge Phil.Soc. 144

      Pages: 411-421

    • Peer Reviewed
  • [Journal Article] On mod p Riemann-Roch formulae for mapping class groups2008

    • Author(s)
      Toshiyuki Akita
    • Journal Title

      Advanced Studies in Pure Math. 52

      Pages: 111-118

    • Peer Reviewed
  • [Journal Article] Generating functions of orbifold Chern classes I : Symmetric Products2008

    • Author(s)
      Toru Ohmoto
    • Journal Title

      Math.Proc.Cambridge Phil.Soc. 144

      Pages: 423-438

    • Peer Reviewed
  • [Presentation] Mackey functors associated with surface symmetries2011

    • Author(s)
      Toshiyuki Akita
    • Organizer
      第6回代数・解析・幾何セミナー
    • Place of Presentation
      鹿児島大学理学部
    • Year and Date
      2011-02-15
  • [Presentation] Chern class for singular spaces2011

    • Author(s)
      Toru Ohmoto
    • Organizer
      JSPS-VAST Japan-Vietnam Bilateral Joint Projects Topology of singularities and related topics II
    • Place of Presentation
      東北大学大学院理学研究科
    • Year and Date
      2011-01-06
  • [Presentation]2010

    • Author(s)
      大本亨
    • Organizer
      The 11th International Workshop on Real and Complex Singularities
    • Place of Presentation
      Instituto de Ciencias Matematicas e de Computacao(ブラジル)
    • Year and Date
      2010-07-27
  • [Presentation]2009

    • Author(s)
      渡邉忠之
    • Organizer
      Quantum algebra related to various topological field theories in geometries
    • Place of Presentation
      京都大学理学部
    • Year and Date
      2009-02-16
  • [Presentation] Surface symmetries and group cohomology2008

    • Author(s)
      秋田利之
    • Organizer
      福岡微分幾何研究会
    • Place of Presentation
      福岡大学セミナーハウス
    • Year and Date
      2008-11-23

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Published: 2012-02-13   Modified: 2016-04-21  

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