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Differential geometry of conformal structures and projective structures

Research Project

Project/Area Number 24540084
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geometry
Research InstitutionOsaka University

Principal Investigator

Kobayashi Osamu  大阪大学, 理学(系)研究科(研究院), 教授 (10153595)

Project Period (FY) 2012-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords共形構造 / 射影構造 / リーマン幾何学 / 正則ホモトピー / シュワルツ微分 / 共形微分幾何学 / 射影微分幾何学 / 共形幾何 / ラゲール幾何 / シュヴァルツ微分 / 山辺不変量 / スカラー曲率
Outline of Final Research Achievements

In conformal geometric aspect, I gave a new interpretation of regular homotopy invariants of closed curves in terms of differential geometry. This will a first step of developing differential geometry of regular homotopy theory by S. Smale.
In projective geometric aspect, I defined a conformal invariant length of a closed curve in a Riemannian manifold. This definition relies essentially on the classification of projective structures of the circle. I have also an observation that this projective classification is relevant to Yamabe's conformal invariant.

Report

(5 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (15 results)

All 2016 2015 2014 2013 2012 Other

All Journal Article (3 results) (of which Peer Reviewed: 2 results) Presentation (8 results) (of which Int'l Joint Research: 1 results,  Invited: 6 results) Book (1 results) Remarks (3 results)

  • [Journal Article] The conformal rotation number2015

    • Author(s)
      Osamu Kobayashi
    • Journal Title

      Kodai Math. J.

      Volume: 38 Pages: 166-171

    • NAID

      130005475891

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Injectivity property of regular curves and a sphere theorem2013

    • Author(s)
      Osamu Kobayashi
    • Journal Title

      Differential geometry of submanifolds and its related topics

      Volume: 1 Pages: 16-18

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Hirzebruch 先生を偲んで2012

    • Author(s)
      小林 治
    • Journal Title

      数学通信

      Volume: 17 Pages: 50-52

    • Related Report
      2012 Research-status Report
  • [Presentation] 閉曲線の共形的長さと山辺の共形不変量2016

    • Author(s)
      小林 治
    • Organizer
      大阪市大微分幾何セミナー
    • Place of Presentation
      大阪
    • Year and Date
      2016-03-08
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] 直線の射影構造と共形的長さ2016

    • Author(s)
      小林 治
    • Organizer
      大阪大学幾何セミナー
    • Place of Presentation
      大阪
    • Year and Date
      2016-01-25
    • Related Report
      2015 Annual Research Report
  • [Presentation] Conformal length through Laguerre geometry2015

    • Author(s)
      Osamu Kobayashi
    • Organizer
      Geometric Analysis an Geometry and Topology
    • Place of Presentation
      東京
    • Year and Date
      2015-11-10
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 閉曲線の正則ホモトピーと共形ラプラシアン2014

    • Author(s)
      小林 治
    • Organizer
      大阪市立大学微分幾何セミナー
    • Place of Presentation
      大阪市立大学
    • Year and Date
      2014-12-10
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] 閉曲線の正則ホモトピーの共形幾何2014

    • Author(s)
      小林 治
    • Organizer
      大阪大学幾何セミナー
    • Place of Presentation
      大阪大学
    • Year and Date
      2014-06-23
    • Related Report
      2014 Research-status Report
  • [Presentation] 共形的回転指数2013

    • Author(s)
      小林 治
    • Organizer
      東京工業大学大岡山談話会
    • Place of Presentation
      東京都
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] アファイン接続のリッチ曲率について

    • Author(s)
      小林 治
    • Organizer
      大阪大学幾何学セミナー
    • Place of Presentation
      大阪大学
    • Related Report
      2012 Research-status Report
    • Invited
  • [Presentation] スカラー曲率に関する未解決と思われる問題について

    • Author(s)
      小林 治
    • Organizer
      大阪大学談話会
    • Place of Presentation
      大阪大学
    • Related Report
      2012 Research-status Report
    • Invited
  • [Book] 山辺の問題2013

    • Author(s)
      小林 治,芥川 和雄,井関 裕靖
    • Total Pages
      75
    • Publisher
      日本数学会
    • Related Report
      2013 Research-status Report
  • [Remarks] (なし)

    • URL

      http://www.math.sci.osaka-u.ac.jp/~kobayashi/

    • Related Report
      2014 Research-status Report
  • [Remarks] セミナー資料

    • URL

      http://www.math.sci.osaka-u.ac.jp/~kobayashi/

    • Related Report
      2013 Research-status Report
  • [Remarks] セミナー資料

    • URL

      http://www.math.sci.osaka-u.ac.jp/~kobayashi/

    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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