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A variational problem on conformality of maps and a variational problem on pullbacks of metrics

Research Project

Project/Area Number 18K03280
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 11020:Geometry-related
Research InstitutionYamaguchi University

Principal Investigator

Nakauchi Nobumitsu  山口大学, 大学院創成科学研究科, 教授 (50180237)

Co-Investigator(Kenkyū-buntansha) 内藤 博夫  山口大学, その他部局等, 名誉教授 (10127772)
近藤 慶  岡山大学, 自然科学研究科, 教授 (70736123)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsvariational problem / symphonic map / C-stationary map / pullback / Riemannian manifold / harmonic map / C-staionary map / 変分問題 / 共形写像 / 共形構造
Outline of Final Research Achievements

A "manifold", or in particular "Riemannian manifold" is a general concept of "a (curved) space", and a "map" between manifolds gives a "relation" between them. The researcher in this research project introduced two new concepts "C-stationary maps" and "symphonic maps" for maps between Riemannian manifolds. In this project we give some new steps and results on these two concepts.

Academic Significance and Societal Importance of the Research Achievements

これらの新しい概念は, もともと「共形写像」という重要な概念から導かれたものであり, 本研究課題の研究成果は, 「共形写像」を含む問題への応用を念頭に置いている. また, 本研究の過程で用いられる議論や手法が, 幾何解析 (Geometric Analysis) の他の分野へ影響を与えることも期待している.

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (11 results)

All 2022 2021 2019 2018

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

  • [Journal Article] Two examples of harmonic maps into spheres2022

    • Author(s)
      Misawa Masashi, Nakauchi Nobumitsu
    • Journal Title

      Advances in Geometry

      Volume: 22 Issue: 1 Pages: 23-31

    • DOI

      10.1515/advgeom-2021-0008

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Regularity of the m-symphonic map2021

    • Author(s)
      Masashi Misawa and Nobumitsu Nakauchi
    • Journal Title

      SN Partial Differential Equations and Applications

      Volume: 2 Issue: 2

    • DOI

      10.1007/s42985-021-00074-y

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Stress energy tensor for symphonic maps2019

    • Author(s)
      Nobumitsu Nakauchiu
    • Journal Title

      Bollettino dell'Unione Matematica Italiana

      Volume: 12 Issue: 3 Pages: 431-440

    • DOI

      10.1007/s40574-018-0168-y

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Stress energy tensor of C-stationary maps2019

    • Author(s)
      Nobumitsu Nakauchiu
    • Journal Title

      Journal of Geometry and Physics

      Volume: 137 Pages: 217-227

    • DOI

      10.1016/j.geomphys.2018.12.004

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Liouville type theorem for symphonic maps2019

    • Author(s)
      Shigeo Kawai and Nobumitsu Nakauchi
    • Journal Title

      Differential Geometry and its Applications

      Volume: 65 Pages: 147-159

    • DOI

      10.1016/j.difgeo.2019.03.009

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Remarks on weakly stationary maps into spheres2018

    • Author(s)
      Masashi Misawa, Nobumitsu Nakauchi
    • Journal Title

      Rend. Circ. Mat. Palermo, II. Ser

      Volume: 印刷中 Issue: 1 Pages: 227-236

    • DOI

      10.1007/s12215-018-0350-1

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Global existence for the heat flow of symphonic maps into spheres2018

    • Author(s)
      Masashi Misawa and Nobumitsu Nakauchi
    • Journal Title

      Advances in Differential Equations

      Volume: 23 Pages: 693-724

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Polyharmonic maps into the Euclidean space2018

    • Author(s)
      Nobumitsu Nakauchi, Hajime Urakawa
    • Journal Title

      Note di Matematica

      Volume: 38 Pages: 89-100

    • DOI

      10.1285/i15900932v38n1p89

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] A Variational Problem on Conformality of Maps and Related Problems2022

    • Author(s)
      Nobumitsu Nakauchi
    • Organizer
      Workshop on Differential Geometry and Geometric Analysis --- Celebration of Professor Miyuki Koiso's Retirement ---
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] リーマン幾何における薄滑解析とリプシッツ写像の近似定理2019

    • Author(s)
      近藤 慶
    • Organizer
      岡山大学理学部談話会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 写像の共形性に関連する変分問題とその研究過程で現れた変分問題2018

    • Author(s)
      中内伸光
    • Organizer
      金沢研究集会「多様体上の微分方程式」(第17回)
    • Related Report
      2018 Research-status Report
    • Invited

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Published: 2018-04-23   Modified: 2023-01-30  

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