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Geometry of the first orthant

Research Project

Project/Area Number 16K13758
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Geometry
Research InstitutionGakushuin University

Principal Investigator

Yamada Sumio  学習院大学, 理学部, 教授 (90396416)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords距離空間 / 射影幾何学 / 複比 / タイヒミュラー理論 / 測地線 / 凸幾何学 / フィンスラー幾何学 / 時空の幾何学 / フィンスラー計量 / タイヒミュラー空間 / リーマン面のモジュライ / ヒルベルト計量 / モジュライ / フンク計量 / ド・シッター幾何学 / 変分法 / 測地線の幾何学 / モジュライ空間 / 微分幾何学
Outline of Final Research Achievements

There typically exists countably many positive quantities affiliated with any Riemannian manifold、each of which is marked with topological labeling of the manifold. Those quantities can be thought of as the coordinates for the first orthant of the Euclidean space. In this way, the space of the Riemannian manifolds are smoothly embedded into the orthant, allowing a completely new approach in the moduli theory of Riemannian geometry, which include the Teichmueller theory. Also accomplished in this project is the new formulation of timelike geometry, after the work of H. Busemann, dated half a century ago. The timelike geometry generalizes the Lorentzian geometry in the context of the theory of metric spaces, and it has opened up a new perspective in the Finsler geometry of non-positive definite type.

Academic Significance and Societal Importance of the Research Achievements

ユークリッド空間の第1象限という古典的な空間は、多様体の幾何構造を表現する正値の幾何学的汎関数を座標関数として同一視することで、多様体のモジュライ空間の普遍的な母空間として機能することを提唱した。一方で第1象限は、射影幾何学的な観点から自然な対象であり、幾何構造のモジュライ理論に必然的に現れる非線形な振る舞いの表現空間として、線形代数的な言葉を用いてモジュライの振る舞いを解析する新たな方法論を定式化したことには意義がある。また一般相対性理論の重要性が再認識されている中で、本研究で確立された時空の幾何学を扱うための新しい数学的枠組みは、科学的な必然性を持つ方向性であると考える。

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

    (57 results)

All 2020 2019 2018 2017 2016 Other

All Int'l Joint Research (18 results) Journal Article (15 results) (of which Int'l Joint Research: 11 results,  Peer Reviewed: 13 results,  Open Access: 12 results,  Acknowledgement Compliant: 3 results) Presentation (23 results) (of which Int'l Joint Research: 7 results,  Invited: 18 results) Funded Workshop (1 results)

  • [Int'l Joint Research] IRMA, Strasbourg(フランス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Basel(スイス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Chebyshev Laboratory St. Pertersburg(ロシア連邦)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Patel Institute of Technology, Gujalat(インド)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Aruel University(イスラエル)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] バーゼル大学(スイス)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] ストラスブルグ大学/IRMA ストラスブルグ(フランス)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] ストラスブール大学(フランス)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] オーベルボルハ数学研究所(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] パドゥア大学(イタリア)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] バーゼル大学(スイス)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] バージニア州立大学(米国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Institut de Recherche Mathematique(フランス)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] シドニー大学(オーストラリア)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] 韓国高等科学院(韓国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] カリフォルニア大学バークレー校(米国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] National Center for Theoretical Sciences(台湾)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Plumbing Constructions and the Domain of Outer Communication for 5-Dimensional Stationary Black Holes2019

    • Author(s)
      Marcus Khuri, 松本幸夫, Gilbert Weinstein, 山田澄生
    • Journal Title

      to appear in Transactions of American Mathematical Society

      Volume: 1 Issue: 5 Pages: 1-1

    • DOI

      10.1090/tran/7812

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Busemann's metric theory of timelike spaces2019

    • Author(s)
      Athanase Papadopoulos, Sumio Yamada
    • Journal Title

      Herbert Busemann Selected Work, Springer

      Volume: Ⅰ Pages: 117-133

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Timelike Hilbert and Funk geometries2019

    • Author(s)
      Papadopoulos Athanase、Yamada Sumio
    • Journal Title

      Differential Geometry and its Applications

      Volume: 67 Pages: 101554-101554

    • DOI

      10.1016/j.difgeo.2019.101554

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Stationary Vacuum Black Holes in 5 Dimensions2019

    • Author(s)
      Marcus Khuri, Gilbert Weinstein, 山田 澄生
    • Journal Title

      Communications in Partial Differential Equations

      Volume: 43(8) Issue: 8 Pages: 1205-1241

    • DOI

      10.1080/03605302.2018.1517791

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Divergence equations and uniqueness theorem of static black holes2018

    • Author(s)
      M. Nozawa, T. Shiromizu, K. Izumi, S. Yamada
    • Journal Title

      Class. Quant. Grav.

      Volume: 35 Issue: 17 Pages: 175009-175009

    • DOI

      10.1088/1361-6382/aad206

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Asymptotically Locally Euclidean/Kaluza-Klein Stationary Vacuum Black Holes in 5 Dimensions2018

    • Author(s)
      Marcus Khuri, Gilbert Weinstein, 山田 澄生
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2018(5) Issue: 5 Pages: 1-1

    • DOI

      10.1093/ptep/pty052

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Busemann’s metric theory of timelike spaces2018

    • Author(s)
      Athanase Papadopoulos, Sumio Yamada
    • Journal Title

      Herbert Busemann Selected Work, Springer (2018)

      Volume: I Pages: 117-133

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Asymptotically Locally Euclidean/Kaluza-Klein Stationary Vacuum Black Holes in 5 Dimensions2018

    • Author(s)
      Marcus Khuri, Gilbert Weinstein, Sumio Yamada
    • Journal Title

      To appear in Progress of Theoretical and Experimental Physics

      Volume: -

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Deforming hyperbolic hexagons with applications to the arc and the Thurston metrics on Teichmueller spaces2017

    • Author(s)
      Athanase Papadopoulos, Sumio Yamada
    • Journal Title

      Monatshefte fur Mathematik

      Volume: 182 Issue: 4 Pages: 913-939

    • DOI

      10.1007/s00605-017-1023-4

    • Related Report
      2017 Research-status Report 2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Riemann's Work on Minimal Surfaces2017

    • Author(s)
      Sumio Yamada
    • Journal Title

      Riemann to Geometry and Rel- ativity edited by L. Ji, A. Papadopoulos and S. Yamada Springer (2017), Chapter 4

      Volume: - Pages: 135-150

    • DOI

      10.1007/978-3-319-60039-0_5

    • ISBN
      9783319600383, 9783319600390
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On the Weil-Petersson convex geometry of Teichmuller space2017

    • Author(s)
      Sumio Yamada
    • Journal Title

      AMS Sugaku Expositions

      Volume: 30 Issue: 2 Pages: 159-186

    • DOI

      10.1090/suga/422

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Timelike Hilbert and Funk Geometries2017

    • Author(s)
      Sumio Yamada
    • Journal Title

      arXiv:1602.07072 [math.DG]

      Volume: -

    • Related Report
      2017 Research-status Report
    • Open Access
  • [Journal Article] Stationary Vacuum Black Holes in 5 Dimensions2017

    • Author(s)
      Marcus Khuri, Gilbert Weinstein, Sumio Yamada
    • Journal Title

      arxiv.org/abs/1711.05229

      Volume: -

    • Related Report
      2017 Research-status Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Proof of the Riemannian Penrose Inequality with Charge for Multiple Black Holes2017

    • Author(s)
      Marcus Khuri, Gilbert Weinstein, Sumio Yamada
    • Journal Title

      Journal of Differential Geometry

      Volume: 印刷中

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Riemann's Work on Minimal Surfaces2017

    • Author(s)
      Sumio Yamada
    • Journal Title

      From Riemann to Geometry and Relativity Springer

      Volume: 印刷中

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] What is a blackhole?2020

    • Author(s)
      山田澄生
    • Organizer
      Geometry and Topology Seminar, IRMA, Strasbourg, フランス
    • Related Report
      2019 Annual Research Report
  • [Presentation] Einstein, Weyl, and Five-Dimensional Blackhole Spacetime2019

    • Author(s)
      山田澄生
    • Organizer
      Chebyshev Laboratory Colloquium(談話会)St. Pertersburg, ロシア
    • Related Report
      2019 Annual Research Report
  • [Presentation] Timelike geometry and generalized de Sitter spaces2019

    • Author(s)
      山田澄生
    • Organizer
      Riemann surfaces and Teichmuller theory, Euler Institute, St. Pertersburg, ロシア
    • Related Report
      2019 Annual Research Report
  • [Presentation] アインシュタイン、ワイル、そして高次元ブラックホール2019

    • Author(s)
      山田澄生
    • Organizer
      東工大大岡山談話会
    • Related Report
      2019 Annual Research Report
  • [Presentation] On Development of Relativity from 1900 to 19202019

    • Author(s)
      山田澄生
    • Organizer
      International Conference on History and Recent Developments in Mathematics, Madhuben and Bhanubhai Patel Institute of Technology, Gujalat, インド
    • Related Report
      2019 Annual Research Report
  • [Presentation] Stationary Einstein equation and harmonic maps2019

    • Author(s)
      山田 澄生
    • Organizer
      The 2nd International Conference Geometry of Submanifolds and Integrable Systems, 大阪市大, 2019年3月25日
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Einstein, Weyl, and five-dimensional blackhole spacetime.2019

    • Author(s)
      山田 澄生
    • Organizer
      Physics Department Seminar, Ariel University, Israel, 2019年2月26日
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] On the shapes of domains of outer communication of the 5D Einstein spacetimes2019

    • Author(s)
      山田 澄生
    • Organizer
      リーマン幾何と幾何解析 筑波大学 2019年1月26日
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Harmonic maps and the Einstein equation2018

    • Author(s)
      山田 澄生
    • Organizer
      国際研究集会 Analysis and Geometry in Minimal Surface Theory, 慶州、韓国
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] H.ワイルによるアインシュタイン方程式と高次元ブラックホール時空2018

    • Author(s)
      山田 澄生
    • Organizer
      京都大学理学研究科数学専攻 談話会 2018年10月24日
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] The Einstein equation according to Hermann Weyl2018

    • Author(s)
      山田 澄生
    • Organizer
      The 102th Encounter between Mathematicians and Theoretical Physicists, IRMA, Strasbourg, France 2018年9月15日 Athanase Papadopoulos
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Harmonic map, symmetric space and Einstein equation2018

    • Author(s)
      山田 澄生
    • Organizer
      New Trends in Teichmüller Theory and Mapping Class Groups, Oberwolfach Mathematical Institute, Germany, 2018年9月8日
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 調和写像とアインシュタイン方程式 -5次元定常時空の構成法-2018

    • Author(s)
      山田 澄生
    • Organizer
      名古屋大学多元数理研究科談話会 2018年7月11日
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Harmonic maps in general relativity2018

    • Author(s)
      山田 澄生
    • Organizer
      The 11th Mathematical Society of Japan (MSJ) Seasonal Institute (SI)、"The Role of Metrics in the Theory of Partial Differential Equations" 北海道大学, 2018年7月3日 日本数学会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] アインシュタイン方程式と調和写像2018

    • Author(s)
      山田澄生
    • Organizer
      研究集会『離散幾何解析学の進展』,明治大学中野キャンパス
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Harmonic Maps and the Einstein Equation: constructing a new set of stationary solutions in 5 dimension2018

    • Author(s)
      山田澄生
    • Organizer
      Workshop on Geometric Analysis and General Relativity,The Chinese University of Hong Kong
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] アインシュタイン方程式と調和写像2018

    • Author(s)
      山田澄生
    • Organizer
      研究集会『リーマン幾何と幾何解析』、筑波大学
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] New exact solutions to the vacuum 4+1 dimensional Einstein equation with non-spherical blackhole horizons2017

    • Author(s)
      Sumio Yamada
    • Organizer
      Workshop "PDEs, Geometric Analysis & Functional Inequalities"
    • Place of Presentation
      University of Sydney, Australia
    • Year and Date
      2017-03-11
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Construction of stationary solutions to the 4+1 Einstein equation with nonspherical blackholes2017

    • Author(s)
      Sumio Yamada
    • Organizer
      Tokyo & Berkeley Mathematics Workshop Partial Differential Equations and Mathematical Physics
    • Place of Presentation
      東京大学
    • Year and Date
      2017-01-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Harmonic map construction of 4+1 spacetimes with non-spherical blackholes2017

    • Author(s)
      山田澄生
    • Organizer
      99e rencontre entre mathematiciens et physiciens theoriciens : Geometrie et physique,Université de Strasbourg
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Construction of stationary blackhole solution to the 4 + 1 vacuum Einstein equation with non-spherical horizons2017

    • Author(s)
      山田澄生
    • Organizer
      Workshop “Analysis, Geometry and Topology of Positive Scalar Curvature Metrics” ,Mathematisches Forschungsinstitut Oberwolfach
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Penrose inequality for the Einstein-Maxwell equation2016

    • Author(s)
      Sumio Yamada
    • Organizer
      Workshop "Geometric inequalities on Riemannian manifolds and related topics"
    • Place of Presentation
      Pusan, Korea
    • Year and Date
      2016-11-25
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] アインシュタイン・マックスウェル方程式の幾何学2016

    • Author(s)
      山田澄生
    • Organizer
      日本数学会幾何学分科会シンポジウム
    • Place of Presentation
      岡山大学
    • Year and Date
      2016-08-29
    • Related Report
      2016 Research-status Report
    • Invited
  • [Funded Workshop] Geometry of Moduli Space of Low Dimensional Manifolds2016

    • Place of Presentation
      数理解析研究所、京都大学
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2023-03-16  

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