• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Research on variational problems associated with higher order geometric structures

Research Project

Project/Area Number 20340009
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

NISHIKAWA Seiki  東北大学, 大学院・理学研究科, 名誉教授 (60004488)

Project Period (FY) 2008 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2011: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2009: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2008: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Keywords調和写像 / エネルギー汎関数 / 複素フィンスラー計量 / 全Q曲率 / 高次の幾何構 造 / 変分問題 / 汎関数の多重凸性 / 接束のローレンツ計量 / 接束のリーマン計量 / Q曲率
Research Abstract

Through a multidisciplinary research on variational problems associated with higher order geometric structures, such as Finsler structures and conformal structures, we prove the following. 1) Any energy minimizing harmonic map from the Riemann sphere into a weakly Kaehler Finsler manifold of positive curvature is either holomorphic or antiholomorphic. 2) The singular set of a nonholomorphic harmonic map from a compact Riemann surface into a complex Finsler manifold is a finite set. 3) Under volume preserving conformal variations of metrics, each Einstein metric of positive scalar curvature is a stable critical point of the total Q curvature.

Report

(6 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report   Self-evaluation Report ( PDF )
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (24 results)

All 2011 2010 2009 2008 Other

All Journal Article (7 results) (of which Peer Reviewed: 7 results) Presentation (16 results) (of which Invited: 1 results) Book (1 results)

  • [Journal Article] Generalized Cheeger-Gromoll metrics and the Hopf map2011

    • Author(s)
      Michel Benyounes,Eric Loubeau and Seiki Nishikawa
    • Journal Title

      Differential Geometry and its Applications

      Volume: 29巻 Issue: 4 Pages: 555-566

    • DOI

      10.1016/j.difgeo.2011.04.037

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Generalized Cheeger-Gromoll metrics and the Hopf map2011

    • Author(s)
      Michele Benyounes
    • Journal Title

      Differential Geometry and its Applications

      Volume: 29 Pages: 555-566

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Critical metrics of the Schouten functional2010

    • Author(s)
      Zejun Hu, Seiki Nishikawa and Udo Simon
    • Journal Title

      Journal of Geometry

      Volume: 98巻 Issue: 1-2 Pages: 91-113

    • DOI

      10.1007/s00022-010-0057-8

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Critical metrics of the Schouten functional2010

    • Author(s)
      Zejun Hu, Seiki Nishikawa, Udo Simon
    • Journal Title

      Journal of Geometry 98巻

      Pages: 91-113

    • Related Report
      2010 Self-evaluation Report
    • Peer Reviewed
  • [Journal Article] Critical metrics of the Schouten functional2010

    • Author(s)
      Zejun Hu, Seiki Nishikawa, Udo Simon
    • Journal Title

      Journal of Geometry

      Volume: 98 Pages: 91-113

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Harmonic maps of Finsler manifolds2008

    • Author(s)
      Seiki Nishikawa
    • Journal Title

      Topics in Differential Geometry, Edutura Academiei Romane

      Pages: 207-247

    • Related Report
      2010 Self-evaluation Report
    • Peer Reviewed
  • [Journal Article] Harmonic maps of Finsler manifolds2008

    • Author(s)
      Seiki Nishikawa
    • Journal Title

      Topics in Differential Geometry, Editura Academiei Romane

      Pages: 207-247

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] Harmonic maps from Riemann surfaces into complex Finsler manifolds2011

    • Author(s)
      Seiki Nishikawa
    • Organizer
      The 46th Symposium on Finsler Geometry
    • Place of Presentation
      静岡・マイホテル竜宮
    • Year and Date
      2011-11-20
    • Related Report
      2011 Final Research Report
  • [Presentation] Hopf differential for harmonic maps into complex Finsler manifolds2011

    • Author(s)
      Seiki Nishikawa
    • Organizer
      Journees Analyse Geometrique de Brest
    • Place of Presentation
      ブレスト大学,仏国
    • Year and Date
      2011-03-24
    • Related Report
      2010 Annual Research Report
  • [Presentation] A Hopf differential associated to harmonic maps into complex Finsler manifolds2011

    • Author(s)
      Seiki Nishikawa
    • Organizer
      Workshop on Geomertric Analysis, Sendai 2011
    • Place of Presentation
      東北大学大学院理学研究科,日本
    • Year and Date
      2011-02-23
    • Related Report
      2010 Annual Research Report
  • [Presentation] Removability of isolated singularities of harmonic maps into Complex Finsler manifolds2010

    • Author(s)
      Seiki Nishikawa
    • Organizer
      Tambara Workshop on Parabolic Geometries and Related Topics I
    • Place of Presentation
      東京大学玉原国際セミナーハウス,日本
    • Year and Date
      2010-11-04
    • Related Report
      2010 Annual Research Report
  • [Presentation] Harmonic maps into complex Finsler manifolds2010

    • Author(s)
      Seiki Nishikawa
    • Organizer
      The 6th Geometry Conference for Friendship of China and Japan
    • Place of Presentation
      中国・西北大学
    • Year and Date
      2010-09-05
    • Related Report
      2011 Final Research Report 2010 Self-evaluation Report
  • [Presentation] Harmonic maps into complex Finsler manifolds2010

    • Author(s)
      Seiki Nishikawa
    • Organizer
      The 6th Geometry Conference for Friendship of China and Japan
    • Place of Presentation
      西北大学,中国
    • Year and Date
      2010-09-05
    • Related Report
      2010 Annual Research Report
  • [Presentation] Harmonic maps into complex Finsler manifolds2010

    • Author(s)
      Seiki Nishikawa
    • Organizer
      The 5th Pacific Rim Conference onMathematics
    • Place of Presentation
      米国・ スタンフォード大学
    • Year and Date
      2010-07-02
    • Related Report
      2011 Final Research Report
  • [Presentation] Harmonic maps into complec Finsler manifolds2010

    • Author(s)
      Seiki Nishikawa
    • Organizer
      The 5th Pacific Rim Conference on Mathematics
    • Place of Presentation
      米国・スタンフォード大学
    • Year and Date
      2010-07-02
    • Related Report
      2010 Self-evaluation Report
  • [Presentation] Harmonic maps into complex Finsler manifolds2010

    • Author(s)
      Seiki Nishikawa
    • Organizer
      The 5^<th> Pacific Rim Conference on Mathematics
    • Place of Presentation
      スタンフォード大学、米国
    • Year and Date
      2010-07-02
    • Related Report
      2010 Annual Research Report
  • [Presentation] 調和写像と複素フィンスラー計量-変分問題の視点から-2010

    • Author(s)
      西川青季
    • Organizer
      研究集会「調和写像の深化と展望」
    • Place of Presentation
      京都大学数理解析研究所,日本
    • Year and Date
      2010-06-03
    • Related Report
      2010 Annual Research Report
  • [Presentation] Harmonic maps into complex Finsler manifolds2009

    • Author(s)
      Seiki Nishikawa
    • Organizer
      The 44th Symposium on Finsler Geometry
    • Place of Presentation
      札幌・東海大学
    • Year and Date
      2009-09-11
    • Related Report
      2011 Final Research Report
  • [Presentation] Harmonic maps into complex Finsler manifolds2009

    • Author(s)
      Seiki Nishikawa
    • Organizer
      The 44th Symposium on Finsler Geometry
    • Place of Presentation
      東海大学
    • Year and Date
      2009-09-11
    • Related Report
      2010 Self-evaluation Report
  • [Presentation] Projective complex curves and projectively flat complex Finsler manifolds2008

    • Author(s)
      Seiki Nishikawa
    • Organizer
      International Conference on Perspectives in Geometric Analysis
    • Place of Presentation
      中国・北京大学
    • Year and Date
      2008-10-27
    • Related Report
      2011 Final Research Report 2010 Self-evaluation Report
  • [Presentation] Geometry of projective complex curves2008

    • Author(s)
      Seiki Nishikawa
    • Organizer
      Conferenceon Conformal Geometry; invariant theory and the variational methods
    • Place of Presentation
      仏国・CNRSロスコフ生物学研究所
    • Year and Date
      2008-07-01
    • Related Report
      2011 Final Research Report
  • [Presentation] Geometry of projective complex curves2008

    • Author(s)
      Seiki Nishikawa
    • Organizer
      Conference on Conformal Geometry ; invariant theory and the variational methods
    • Place of Presentation
      仏国・CNRSロスコフ生物学研究所
    • Year and Date
      2008-07-01
    • Related Report
      2010 Self-evaluation Report
  • [Presentation] Harmonic maps from Riemann surfaces into complex Finsler manifolds

    • Author(s)
      Seiki Nishikawa
    • Organizer
      The 46-th Symposium on Finsler Geometry
    • Place of Presentation
      静岡マイホテル竜宮
    • Related Report
      2011 Annual Research Report
    • Invited
  • [Book] Topics in Differential Geometry, Edutura Academiei Romane2008

    • Author(s)
      Seiki Nishikawa
    • Publisher
      Harmonic maps of Finsler manifolds
    • Related Report
      2011 Final Research Report

URL: 

Published: 2008-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi