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Potentials and energies of compact submanifolds of Eulicidean spaces

Research Project

Project/Area Number 16K05136
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

O'Hara Jun  千葉大学, 大学院理学研究院, 教授 (70221132)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsポテンシャル / エネルギー / 正則化 / メビウス不変性 / インダクタンス / ベータ関数 / Rieszポテンシャル / 留数 / 結び目 / 自己インダクタンス / Riesz ポテンシャル / 内在的体積 / 部分多様体 / 幾何学
Outline of Final Research Achievements

Let M be an m-dimensional compact submanifold of an n-dimensional Euclidean space. Let B(z) be the integral of the distance between a pair of points x and y in M to the power z over the product space M times M. Consider B(z) as a function of a complex variable z. By a meromorphic regularization, i.e. the regularization via analytic continuation we obtain a meromorphic function with simple poles, called Brylinski beta function of M. If M is an odd dimensional closed submanifold or an even dimensional compact body (closure of an open set of the Euclidean space) then the value of B(z) with z being equal to -2m is invariant under Mobius transformations. This result was obtained in the joint work with Gil Solanes.
We obtain regularized self-inductance of a current in a single loop by applying our method to Neumann formula and Weber formula for mutual inductances. We also studied Mobius invariant metrics on the space of knots.

Academic Significance and Societal Importance of the Research Achievements

多様体のRieszエネルギーは研究代表者が与えた結び目のエネルギーの自然な拡張である。解析接続を用いることにより、多様体に対して、エネルギーと多様体のBrylinskiベータ関数の留数という2系統の量が得られた。留数の例としては、曲面のWillmoreエネルギーがある。エネルギーという大域的な量と、留数という局所的な量を積分して得られる量という、共に幾何学的に重要な量を導入し、その重要性の一部(メビウス群に関する対称性、球体の同定など)を示すことができたことが、本研究の一番大きな学術的意義である。
また、研究手法自体も、電磁気学のインダクタンスを単一回路で考えたものの発散を除くことに応用できる。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (18 results)

All 2019 2018 2017 Other

All Int'l Joint Research (4 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results) Presentation (8 results) (of which Int'l Joint Research: 6 results,  Invited: 4 results) Remarks (3 results)

  • [Int'l Joint Research] バルセロナ自治大学(スペイン)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ブルゴーニュ大学(フランス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ブルゴーニュ大学(フランス)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] バルセロナ自治大学区(スペイン)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Characterization of balls by generalized Riesz energy2019

    • Author(s)
      Jun O'Hara
    • Journal Title

      Math. Nachr.

      Volume: 292 Issue: 1 Pages: 159-169

    • DOI

      10.1002/mana.201700256

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Regularized Riesz energies of submanifolds2018

    • Author(s)
      Jun O'Hara and Gil Solanes
    • Journal Title

      Mathematische Nachrichten

      Volume: 291 Issue: 8-9 Pages: 1356-1373

    • DOI

      10.1002/mana.201600083

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Triangles with sides in arithmetic progression2017

    • Author(s)
      Kentaro Mikami, Jun O'Hara and Kunio Sugahara
    • Journal Title

      Elem. Math.

      Volume: 72 Issue: 2 Pages: 75-79

    • DOI

      10.4171/em/327

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Energy of knots in the 3-sphere2019

    • Author(s)
      Jun O'Hara
    • Organizer
      MARS Workshop, Salzburg
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Mobius invariant metric on the knot space2019

    • Author(s)
      Jun O'Hara
    • Organizer
      Biology, Analysis, Geometry, Energies, Links [bagel19]
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 多様体の留数とエネルギー2019

    • Author(s)
      今井 淳
    • Organizer
      多様体上の微分方程式
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Regularization of self-inductance2018

    • Author(s)
      Jun O'Hara
    • Organizer
      33rd Summer Conference on Topology and its Applications
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 自己インダクタンスの正則化2018

    • Author(s)
      今井 淳
    • Organizer
      日本数学会 秋季総合分科会
    • Related Report
      2018 Research-status Report
  • [Presentation] Characterization of unit balls by Riesz energy2017

    • Author(s)
      Jun O'Hara
    • Organizer
      Convex, discrete and integral geometry
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] From energy of knots to regularized Riesz energy of submanifolds2017

    • Author(s)
      Jun O'Hara
    • Organizer
      The 12th East Asian School of Knots and Related Topics
    • Place of Presentation
      東京大学 (東京都・目黒区)
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Riesz エネルギーの正則化と球体の特徴づけ2017

    • Author(s)
      今井 淳
    • Organizer
      日本数学会年会
    • Place of Presentation
      首都大学東京 (東京都・八王子市)
    • Related Report
      2016 Research-status Report
  • [Remarks] Jun O'Hara

    • URL

      https://sites.google.com/site/junohara/home

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
  • [Remarks] 今井淳

    • URL

      https://sites.google.com/site/junohara/ri-ben-yu

    • Related Report
      2017 Research-status Report
  • [Remarks] 研究内容

    • URL

      https://sites.google.com/site/junohara/ri-ben-yu/yan-jiu-bao-gao/yan-jiu-nei-rong

    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2021-02-19  

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