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2013 Fiscal Year Annual Research Report

偏微分方程式の解の形状と挙動に関する系統的研究

Research Project

Project/Area Number 24244012
Research InstitutionTokyo Institute of Technology

Principal Investigator

柳田 英二  東京工業大学, 理工学研究科, 教授 (80174548)

Co-Investigator(Kenkyū-buntansha) 仙葉 隆  九州工業大学, 工学(系)研究科(研究院), 教授 (30196985)
内藤 雄基  愛媛大学, 理工学研究科, 教授 (10231458)
壁谷 喜継  大阪府立大学, 工学(系)研究科(研究院), 教授 (70252757)
石渡 通徳  福島大学, 共生システム理工学類, 准教授 (30350458)
高坂 良史  室蘭工業大学, 工学(系)研究科(研究院), 准教授 (00360967)
Project Period (FY) 2012-05-31 – 2017-03-31
Keywords関数方程式の大域理論 / 安定性 / 漸近挙動 / 分岐構造 / 特異性
Research Abstract

放物型および楕円型偏微分方程式の解の構造についての研究を進め,以下のような成果をあげた.
・藤田型方程式に対し,ホモクリニック解の到達可能性という概念を定義し,到達可能であるための必要条件について調べ,指数がソボレフ臨界指数を超えたところに,到達不可能なホモクリニック解が存在することを証明した.
・双曲空間および球面上の領域での解の分岐を解明するため,その基礎となる結果を示し,また,球面上の領域でのスカラー場方程式の解の分岐現象の解明のの基礎となる線形化問題の固有値の分布を解明した.
・ある種の生命現象を表す反応拡散系の特異極限を考えることで,場の方程式と場の境界値に依存した自由境界問題の結合系を導出し,この結合系に対して凸および非凸の進行スポット解の存在を明らかにした.また,この結合系の解の存在定理を証明するための手順を定式化した.
・新たな臨界log-Hardy型不等式と平均振動型不等式を導入し,対応する最良定数が達成されないことを示た.また,非等方的 infinity-Laplacian に対して,漸近的平均値の定理が成り立つかどうかを考察し,肯定的結果を得た.
・空間次元が11以上の場合について,走化性方程式の球対称な定常解が球対称な摂動に対して安定である事を示し,さらにこの事実の応用として走化性方程式の球対称な振動解を構成した.

Current Status of Research Progress
Current Status of Research Progress

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

Reason

放物型偏微分方程式については,藤田型方程式の安定な特異定常解への収束レート,ホモクリニック解の大域的性質,反応拡散方程式の特異極限の解の構造について新たな進展があった.楕円型方程式については,双曲空間および球面上の領域での解の分岐構造の解明と,臨界log-Hardy型不等式と平均振動型不等式の最良定数について,いくつかの興味深い結果を得た.

Strategy for Future Research Activity

放物型偏微分方程式については,藤田型方程式のホモクリニック解近傍にある解の性質を明らかにすることにより,その近傍にある多重ホモクリニック解や非収束解の存在を示すことを目標にする.楕円型方程式については,より一般的な領域における分岐構造の解明を目指す.
この目的のために,7月にスペインで行われる研究集会に参加し,情報の収集を諮るとともに,関係のある研究者と討論を行う.また,9月には,国際研究集会 Euro-Japanese Workshop on Blow-up を東工大で開催し,ヨーロッパから10名ほどの研究者を招へいして講演を依頼する.

  • Research Products

    (37 results)

All 2014 2013 Other

All Journal Article (13 results) (of which Peer Reviewed: 12 results) Presentation (24 results) (of which Invited: 19 results)

  • [Journal Article] Existence and uniqueness of singular solutions for elliptic equation on the hyperbolic space2014

    • Author(s)
      Yen-Lin Wu, Chi-You Chen, Jann-Long Chern, Yoshitsugu Kabeya
    • Journal Title

      Communications on Pure and Applied Analysis

      Volume: 13 Pages: 949-960

    • DOI

      10.3934/cpaa.2014.13.949

    • Peer Reviewed
  • [Journal Article] Mean curvature flow with triple junctions in higher space dimensions2014

    • Author(s)
      Daniel Depner, Harald Garcke, Yoshihito Kohsaka
    • Journal Title

      Archive for Rational Mechanics and Analysis

      Volume: 211 Pages: 301-334

    • DOI

      10.1007/s00205-013-0668-y

    • Peer Reviewed
  • [Journal Article] Convergence and blow-up of solutions for a complex-valued heat equation with a quadratic nonlinearity2013

    • Author(s)
      J.-S. Guo, H. Ninomiya, M. Shimojo and E. Yanagida
    • Journal Title

      Trans. Amer. Math. Soc.

      Volume: 365 Pages: 2447-2467

    • DOI

      10.1090/S0002-9947-2012-05797-7

    • Peer Reviewed
  • [Journal Article] Behavior of global solutions of the Fujita equation2013

    • Author(s)
      E. Yanagida
    • Journal Title

      Sugaku Expositions

      Volume: 26 Pages: 129-147

    • Peer Reviewed
  • [Journal Article] Sharp decay estimates of $L^q$-norms for nonnegative Schrodinger heat semigroups2013

    • Author(s)
      N. Ioku, K. Ishige and E. Yanagida
    • Journal Title

      Journal of Functional Analysis

      Volume: 264 Pages: 2764-2783

    • DOI

      10.1016/j.jfa.2013.03.009

    • Peer Reviewed
  • [Journal Article] Stability of stationary solutions and existence of oscillationg solutions to a chemotaxis system in high dimensional spaces2013

    • Author(s)
      Takasi Senba
    • Journal Title

      Funkcialaj Ekvacioj

      Volume: 56 Pages: 339-378

    • Peer Reviewed
  • [Journal Article] On the behavior of radial solutions to a parabolic-elliptic system related to biology2013

    • Author(s)
      仙葉隆(Takasi Senba)
    • Journal Title

      京都大学数理解析研究所講究録

      Volume: 1856 Pages: 143-151

  • [Journal Article] Characterization for rectifiable and nonrectifiable attractivity of nonautonomous systems of linear differential equations2013

    • Author(s)
      Yuki Naito and Mervan Pasic
    • Journal Title

      Int. J. Differential Equ.

      Volume: 2013 (Article ID: 740980) Pages: 1-11

    • DOI

      dx.doi.org/10.1155/2013/740980

    • Peer Reviewed
  • [Journal Article] Fractal oscillations near the domain boundary of radially symmetric solutions of p-Laplace equations2013

    • Author(s)
      Yuki Naito, Mervan Pasic, Satoshi Tanaka and Darko Zubrinic
    • Journal Title

      Contempt Math.

      Volume: 601 Pages: 325-343

    • DOI

      dx.doi.org/10.1090/conm/601/11912

    • Peer Reviewed
  • [Journal Article] A unified approach to Matukuma type equations on the hyperbolic space or on a sphere2013

    • Author(s)
      Yoshitsugu Kabeya
    • Journal Title

      Discrete and Continuous Dynamical Systems, Supplement

      Volume: 1 Pages: 385-391

    • DOI

      10.3934/proc.2013.2013.385

    • Peer Reviewed
  • [Journal Article] On the existence and nonexistence of maximizers associated with Trudinger-Moser type inequalities in unbounded domains2013

    • Author(s)
      Michinori Ishiwata
    • Journal Title

      Emerging topics on differential equations and their applications, Nankai series in pure, applied mathematics and theoretical physics

      Volume: 10 Pages: 41-53

    • DOI

      10.1142/9789814449755_0004

    • Peer Reviewed
  • [Journal Article] Positive solutions to a semilinear parabolic equation associated with the critical Sobolev exponent2013

    • Author(s)
      Michinori Ishiwata, Takashi Suzuki
    • Journal Title

      Nonlinear Differential Equations and Applications NoDEA

      Volume: 20 Pages: 1553-1576

    • DOI

      10.1007/s00030-013-0221-6

    • Peer Reviewed
  • [Journal Article] Multiple positive solutions of semilinear elliptic equations with weight function in exterior domains2013

    • Author(s)
      Michinori Ishiwata
    • Journal Title

      Differential and Integral Equations

      Volume: 26 Pages: 183-200

    • Peer Reviewed
  • [Presentation] 単独反応拡散方程式に見られる複雑な解の挙動

    • Author(s)
      柳田英二
    • Organizer
      東北大学数学専攻談話会
    • Place of Presentation
      東北大学川井ホール(宮城県)
    • Invited
  • [Presentation] 単独反応拡散方程式における局在解の収束性

    • Author(s)
      柳田英二
    • Organizer
      研究集会「反応拡散系のパターンダイナミクス」
    • Place of Presentation
      富山大学理学部多目的ホール(富山県)
    • Invited
  • [Presentation] On the behavior of solutions to a system of partial differential equations related to biology

    • Author(s)
      Takasi Senba
    • Organizer
      The 22nd International Conference of FIM on Interdisciplinary Mathematics, Statistics and Computational Techniques
    • Place of Presentation
      北九州国際会議場(福岡県北九州市)
    • Invited
  • [Presentation] On the behavior of radial solutions to a parabolic-elliptic system

    • Author(s)
      Takasi Senba
    • Organizer
      2nd Kyushu-Euskadi Workshop on Applied Mathematics
    • Place of Presentation
      福岡大学セミナーハウス(福岡県福岡市)
    • Invited
  • [Presentation] Some properties of radial stationary solutions to a parabolic-elliptic system and its application

    • Author(s)
      Takasi Senba
    • Organizer
      Conference on Nonlinear Phenomena in Biology, Physics and Mechanics
    • Place of Presentation
      Helmholtz Zentrum Munchen, Deutschland
    • Invited
  • [Presentation] Separation structure of positive radaial solutions for semilinear elliptic equations

    • Author(s)
      Yuki Naito
    • Organizer
      The 2nd Hanbat PDE Conference
    • Place of Presentation
      Hanbat National University, Daejeon, Korea
    • Invited
  • [Presentation] Separation structure of positive radial solutions for semilinear elliptic equations

    • Author(s)
      内藤雄基
    • Organizer
      振動理論ワークショップ - 金沢 2014
    • Place of Presentation
      金沢大学サテライト・プラザ(石川県)
  • [Presentation] Global attractivity in the weighted norm fora supercritical semilinear heat equation

    • Author(s)
      Yuki Naito
    • Organizer
      2014 International Workshop on Nonlinear PDE and Applications
    • Place of Presentation
      Pusan National University, Busan, Korea
    • Invited
  • [Presentation] Non-azimuthal solutions to a nonlinear elliptic equation on a spherical cap

    • Author(s)
      Yoshitsugu Kabeya
    • Organizer
      2013 Workshop in Nonlinear Equations in Population Biology
    • Place of Presentation
      華東師範大学 (中国)
    • Invited
  • [Presentation] A unified approach to nonlinear elliptic problems on the hyperbolic space or on the sphere

    • Author(s)
      Yoshitsugu Kabeya
    • Organizer
      Applied Mathematics Seminar
    • Place of Presentation
      University of Zurich, Switzerland
    • Invited
  • [Presentation] Bifurcation diagrams of the nonlinear elliptic equation of the scalar-filed type on a spherical cap

    • Author(s)
      Yoshitsugu Kabeya
    • Organizer
      20th Microlocal Analysis and Classical Analysis
    • Place of Presentation
      京都大学理学研究科セミナーハウス(京都府)
  • [Presentation] Bifurcation diagrams of a nonlinear elliptic equation on a spherical cap

    • Author(s)
      Yoshitsugu Kabeya
    • Organizer
      NTU and NCTS/TPE seminar on PDE
    • Place of Presentation
      国立台湾大学 (台北・台湾)
    • Invited
  • [Presentation] Bifurcation diagrams of a nonlinear elliptic equation on a spherical cap

    • Author(s)
      Yoshitsugu Kabeya
    • Organizer
      PDE Seminar
    • Place of Presentation
      National Central University, Jhongli City, Taiwan
    • Invited
  • [Presentation] On the global compactness type result for weighted energy functional involving Sobolev critical exponent and its applications

    • Author(s)
      Michinori Ishiwata
    • Organizer
      南大阪応用数学セミナー
    • Place of Presentation
      大阪市立大学理学研究科数学講究室(大阪府)
  • [Presentation] Scale invariant version of the critical Hardy inequality and the associated variational problems

    • Author(s)
      Michinori Ishiwata
    • Organizer
      金沢解析セミナー
    • Place of Presentation
      金沢大学(石川県)
  • [Presentation] On the scale-invariant critical Hardy's inequality and related variational problems

    • Author(s)
      Michinori Ishiwata
    • Organizer
      EQUADIFF 13
    • Place of Presentation
      Charles University, Prague, Czech Republic
    • Invited
  • [Presentation] The scale-invariant log-Hardy inequalities and related variational problems

    • Author(s)
      Michinori Ishiwata
    • Organizer
      3rd Italian-Japanese workshop on geometric properties for parabolic and elliptic PDE's
    • Place of Presentation
      Tokyo Institute of Technology(東京都)
    • Invited
  • [Presentation] On an interfacial motion by surface diffusion

    • Author(s)
      高坂良史
    • Organizer
      SIAM Conference on Mathematical Aspects of Materials Science
    • Place of Presentation
      DoubleTree by Hilton Hotel, Philadelphia, USA
  • [Presentation] Mean curvature flow with a triple junction in multi-dimensional case

    • Author(s)
      高坂良史
    • Organizer
      Workshop on nonlinear PDEs-PDE approach to network and related topics-
    • Place of Presentation
      東北大学川井ホール(宮城県)
    • Invited
  • [Presentation] Stability analysis of interfaces controlled by surface diffusion

    • Author(s)
      高坂良史
    • Organizer
      Mathematical Aspects of Surface and Interface Dynamics VI
    • Place of Presentation
      東京大学駒場キャンパス(東京都)
    • Invited
  • [Presentation] 表面拡散方程式に対する定常曲線・曲面の安定性解析について

    • Author(s)
      高坂良史
    • Organizer
      九大幾何セミナー
    • Place of Presentation
      九州大学伊都キャンパス(福岡県)
    • Invited
  • [Presentation] On the local existence for mean curvature flow with a triple junction in multi-dimensional case

    • Author(s)
      高坂良史
    • Organizer
      One-day workshop on geometric variational problems
    • Place of Presentation
      北海道大学理学部(北海道)
    • Invited
  • [Presentation] 表面拡散方程式による平均曲率一定曲面の安定性解析

    • Author(s)
      高坂良史
    • Organizer
      微分方程式の総合的研究
    • Place of Presentation
      東京大学駒場キャンパス(東京都)
    • Invited
  • [Presentation] トリプル・ジャンクションをもつ相境界の安定性について

    • Author(s)
      高坂良史
    • Organizer
      数学協働プログラム ワークショップ表面微細構造の学理の探求:低環境負荷材料の創造に向けて
    • Place of Presentation
      北海道大学理学部(北海道)
    • Invited

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Published: 2015-05-28  

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