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2017 Fiscal Year Annual Research Report

解析学に基づくアインシュタイン方程式の総合研究

Research Project

Project/Area Number 16H03940
Research InstitutionYamagata University

Principal Investigator

中村 誠  山形大学, 理学部, 教授 (70312634)

Co-Investigator(Kenkyū-buntansha) 杉本 充  名古屋大学, 多元数理科学研究科, 教授 (60196756)
和田出 秀光  金沢大学, 機械工学系, 准教授 (00466525)
竹田 寛志  福岡工業大学, 工学部, 准教授 (10589237)
Project Period (FY) 2016-04-01 – 2021-03-31
Keywords偏微分方程式 / 非線形 / 初期値問題 / 一様等方空間
Outline of Annual Research Achievements

昨年度に引き続き、一様等方空間における非線形偏微分方程式の初期値問題について考察した。非線形クライン・ゴルドン方程式、非線形シュレディンガー方程式と共に、電磁場中に質量を持つ粒子の運動を記述する非線形場方程式の導出とエネルギー評価について考察した。ラグランジアンからの変分原理に基づいた方程式の導出と共に、エネルギー密度関数の発散形式が得られるかについて考察した。オイラー・ラグランジュ方程式とエネルギー密度関数の関係において、エネルギー密度関数が非負となるための計量のスケール関数の性質を考察した。ド・ジッター空間が有界領域の場合に、線形評価としてストリッカーツ型評価とエネルギー評価を構成し、非線形偏微分方程式の初期値問題を考察した。ハッブル定数と非線形項の増大度を表す指数の間に特定の関係式が成り立つ場合に大域解が得らることを示した。非線形項が共形指数の場合に、爆発解が得られるかについて考察した。方程式がエネルギー・ストレステンソルの保存則から従う非線形偏微分方程式について考察した。この場合、ベクトル場の方程式となり、共変微分の交換子が問題となる。エネルギー評価を構成し、空間膨張が消散効果をもたらすことを示した。非相対論的極限として得られる方程式も導出し、エネルギー評価を構成した。本研究の成果を論文として投稿し、研究経過を国際研究集会と国内研究集会で発表した。研究集会では、参加した研究者と研究動向、問題点、解決方法について討論を行った。また、研究集会を開催し、関連研究を調査すると共に、共通課題について討論を行った。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

当初計画に沿って進展している。

Strategy for Future Research Activity

今後も計画に沿って研究を進める。

  • Research Products

    (38 results)

All 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results) Presentation (30 results) (of which Int'l Joint Research: 14 results,  Invited: 25 results)

  • [Int'l Joint Research] The University of Texas(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      The University of Texas
  • [Int'l Joint Research] Peking University(中国)

    • Country Name
      CHINA
    • Counterpart Institution
      Peking University
  • [Journal Article] On the regularity of the semilinear term on the Cauchy problem for the Schroedinger equation2019

    • Author(s)
      M. Nakamura
    • Journal Title

      Proceedings of the 11th ISAAC congress 2017

      Volume: 印刷中 Pages: -

    • Peer Reviewed
  • [Journal Article] Some effects of the spatial variance on the Cauchy problem for partial differential equations2018

    • Author(s)
      M. Nakamura
    • Journal Title

      RIMS Kokyuroku Bessatsu

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Unconditional small data global well-posedness for nonlinear beam equations with weak damping2018

    • Author(s)
      H. Takeda
    • Journal Title

      Nonlinear Analysis. Real World Applications

      Volume: 41 Pages: 1-33

    • DOI

      10.1016/j.nonrwa.2017.10.007

    • Peer Reviewed
  • [Journal Article] Uniform Energy Decay for Wave Equations with Unbounded Damping Coefficients2018

    • Author(s)
      R. Ikehata, H. Takeda
    • Journal Title

      Funkcialaj Ekvacioj

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] On the best constant and extremisers for some smoothing estimates2017

    • Author(s)
      N. Bez, M. Sugimoto
    • Journal Title

      J. Anal. Math.

      Volume: 131 Pages: 159-187

    • DOI

      10.1007/s11854-017-0005-8

    • Peer Reviewed
  • [Journal Article] A natural approach to the asymptotic mean value property for the p-Laplacian2017

    • Author(s)
      M. Ishiwata, R. Magnanini, H. Wadade
    • Journal Title

      Calculus of Variations and Partial Differential Equations

      Volume: 56 Pages: 56-97

    • DOI

      10.1007/s00526-017-1188-7

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Remarks on the derivation of Navier-Stokes equations and elastic wave equations in uniform and isotropic spacetimes2018

    • Author(s)
      M. Nakamura
    • Organizer
      日本数学会年会, 東京大学.
  • [Presentation] On the Cauchy problem of a semilinear diffusion equation in an expanding space2018

    • Author(s)
      M. Nakamura, Y. Sato
    • Organizer
      日本数学会年会, 東京大学.
  • [Presentation] On the numerical stability of semi-linear Klein-Gordon equations in de Sitter spacetime2018

    • Author(s)
      M. Nakamura, T. Tsuchiya
    • Organizer
      日本数学会年会, 東京大学.
  • [Presentation] A local-to-global boundedness argument and Fourier integral operators2018

    • Author(s)
      M. Sugimoto
    • Organizer
      Hyperbolic Partial Differential Equations and Related Topics, 中央大学
    • Int'l Joint Research / Invited
  • [Presentation] Optimal estimates of Kato--Yajima type with angular smoothing2018

    • Author(s)
      M. Sugimoto
    • Organizer
      偏微分方程式姫路研究集会, イーグレ姫路.
    • Int'l Joint Research / Invited
  • [Presentation] Asymptotic expansion of solutions to a nonlinear strong damped wave equation2018

    • Author(s)
      H. Takeda
    • Organizer
      Critical exponent and nonlinear evolution equations 2018, 東京理科大学.
    • Int'l Joint Research / Invited
  • [Presentation] On the regularity of power type nonlinear term of the Schroedinger equation2017

    • Author(s)
      M. Nakamura
    • Organizer
      East Asian Conference in Harmonic Analysis and its Applications 2017, Zhejiang University of Science and Technology, China.
    • Int'l Joint Research / Invited
  • [Presentation] The regularity of the semilinear term on the Cauchy problem for the Schroedinger equation2017

    • Author(s)
      M. Nakamura
    • Organizer
      The 11th ISAAC congress, Linnaeus University, Sweden.
    • Int'l Joint Research / Invited
  • [Presentation] Remarks on several second order partial differential equations and a generalization of the Einstein equation2017

    • Author(s)
      M. Nakamura
    • Organizer
      京都大学NLPDEセミナー, 京都大学.
    • Invited
  • [Presentation] On the effects of spatial expansion and contraction on the semilinear Klein-Gordon equation2017

    • Author(s)
      M. Nakamura
    • Organizer
      研究集会"Nonlinear Wave and Dispersive Equations," 京都大学.
    • Int'l Joint Research / Invited
  • [Presentation] Dissipative effects of the spatial expansion for several PDEs2017

    • Author(s)
      M. Nakamura
    • Organizer
      研究集会「反応拡散方程式と非線形分散型方程式の解の挙動」, 京都大学.
    • Invited
  • [Presentation] Remarks on the derivation of several partial differential equations2017

    • Author(s)
      M. Nakamura
    • Organizer
      研究集会``Recent Topics on Partial Differential Equations," 中央大学.
    • Int'l Joint Research / Invited
  • [Presentation] On the Cauchy problem for semi-linear Klein-Gordon equations in de Sitter spacetime2017

    • Author(s)
      M. Nakamura
    • Organizer
      The 27th Workshop on General Relativity and Gravitation in Japan,東広島市くららホール.
  • [Presentation] Remarks on semilinear field equations in uniform and isotropic spaces2017

    • Author(s)
      M. Nakamura
    • Organizer
      研究集会「微分方程式の総合的研究」, 東京工業大学.
    • Invited
  • [Presentation] On the Cauchy problem for semi-linear field equations in de Sitter spacetime2017

    • Author(s)
      M. Nakamura
    • Organizer
      Lectures, School of Mathematical Sciences, 北京大学, 中国.
    • Invited
  • [Presentation] On several partial differential equations in uniform and isotropic spaces2017

    • Author(s)
      M. Nakamura
    • Organizer
      研究集会「第19回特異点研究会」, 大阪市立大学.
  • [Presentation] Remarks on nonlinear operations on modulation spaces2017

    • Author(s)
      M. Sugimoto
    • Organizer
      Aspects of Time-Frequency Analysis, イタリア.
    • Int'l Joint Research / Invited
  • [Presentation] Spectral comparison of smoothing estimates and its applications2017

    • Author(s)
      M. Sugimoto
    • Organizer
      8th International conference on Mathematical Modeling, ロシア.
    • Int'l Joint Research / Invited
  • [Presentation] Remarks on nonlinear operations on modulation spaces2017

    • Author(s)
      M. Sugimoto
    • Organizer
      Harmonic Analysis and its Applications in Tokyo 2017, 日本大学.
    • Int'l Joint Research / Invited
  • [Presentation] 制限定理と関連する偏微分方程式論の諸問題2017

    • Author(s)
      M. Sugimoto
    • Organizer
      名古屋大学大学院多元数理科学研究科
    • Invited
  • [Presentation] Spectral Comparison of Smoothing Estimates2017

    • Author(s)
      M. Sugimoto
    • Organizer
      The 11th ISAAC Congress, Sweden.
    • Int'l Joint Research / Invited
  • [Presentation] Trace theorems and related topics on PDE2017

    • Author(s)
      M. Sugimoto
    • Organizer
      Gadjah Mada 大学, インドネシア.
    • Int'l Joint Research / Invited
  • [Presentation] Spectral comparison of smoothing estimates2017

    • Author(s)
      M. Sugimoto
    • Organizer
      Recent Topics on Partial Differential Equations, 中央大学.
    • Invited
  • [Presentation] 制限定理と関連する偏微分方程式論の諸問題2017

    • Author(s)
      M. Sugimoto
    • Organizer
      談話会, 広島大学.
    • Invited
  • [Presentation] 構造的消散項をもつ波動方程式の解の大域挙動とその応用について2017

    • Author(s)
      H. Takeda
    • Organizer
      第2回大分解析セミナー, 福岡工業大学.
    • Invited
  • [Presentation] 非線形強消散型波動方程式の時間大域解の挙動について2017

    • Author(s)
      H. Takeda
    • Organizer
      九州関数方程式セミナー, 福岡大学セミナーハウス.
    • Invited
  • [Presentation] 強消散項を持つ非線形波動方程式の解の漸近形について2017

    • Author(s)
      H. Takeda
    • Organizer
      東北大学応用数学セミナー, 東北大学.
    • Invited
  • [Presentation] Asymptotic expansion of the solution to a nonlinear wave equation with strong damping2017

    • Author(s)
      H. Takeda
    • Organizer
      解析セミナー, 神戸大学.
    • Invited
  • [Presentation] Large time behavior of solutions to strong damped wave equations2017

    • Author(s)
      H. Takeda
    • Organizer
      The 11th ISAAC congress, Sweden.
    • Int'l Joint Research / Invited
  • [Presentation] Asymptotic profile of solutions to a nonlinear wave equation with strong damping2017

    • Author(s)
      H. Takeda
    • Organizer
      Ito Workshop on Partial Differential Equaions, 九州大学.
    • Int'l Joint Research / Invited

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Published: 2018-12-17  

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