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ネットワーク構造に対する非線形解析

Research Project

Project/Area Number 16654032
Research Category

Grant-in-Aid for Exploratory Research

Allocation TypeSingle-year Grants
Research Field Global analysis
Research InstitutionTohoku University

Principal Investigator

柳田 英二  東北大学, 大学院理学研究科, 教授 (80174548)

Co-Investigator(Kenkyū-buntansha) 高木 泉  東北大学, 大学院理学研究科, 教授 (40154744)
栄 伸一郎  九州大学, 大学院数理学研究院, 教授 (30201362)
二宮 広和 (二宮 宏和)  龍谷大学, 理工学部, 助教授 (90251610)
Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2006: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2005: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2004: ¥900,000 (Direct Cost: ¥900,000)
Keywords非線形 / 拡散 / ダイナミクス / 退化 / ネットワーク / 3重結合 / 曲率流 / 特異性 / 反応拡散系 / 平均曲率流 / 特異方程式
Research Abstract

3重結節点のみからなるネットワークf構造を持つ界面に対し,各弧が平均曲率流に従い,3重結節点ではヤングの法則を満たし,境界とは直交するように接している場合について,界面がどのようなダイナミクスに従うかについて研究を進めた.特に,考える領域の境界の曲率がダイナミクスに及ぼす影響について考察した.本年度は特に,3重結節点が複数ある場合について,定常解の存在条件を明らかにし,その情報から安定性を決定する方法について研究を進め,以下のような成果を上げた.
まず,定常界面の安定性に関する理論的考察を元に,3重結節点が1個の場合について得られている存在条件を帰納法を用いて一般化することにより,複数個の3重結節点を持つ界面の存在条件を明らかにした.さらには,条件を境界からの寄与と内部構造からの寄与の項に分解し,境界の曲率の符号と不安定性次元の関係を明らかにした.
次に,与えられた領域において,負の長さを許した場合の定常状態が存在するための条件と安定性との関わりについて調べた.これは古典的なFermat-Steiner問題と関係する興味深い変分問題であるが,境界条件の違いから自由度の高い難しい問題となる.これまでの研究により,凸領域において複数個の3重結節点を持つ界面に対して定常状態の存在が示されているが,ここでは非凸な領域についても研究を進め,変曲点で退化しない場合には定常解は退化せず,従って双曲的な性質を持つことを明らかにした.
その他,ネットワーク上の領域における線形固有値問題の主固有値の最小化問題,熱方程式の解の臨界点の位置に関する研究を行い,その基本的な性質について詳細に調べた.

Report

(3 results)
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (25 results)

All 2006 2005 2004

All Journal Article (24 results) Book (1 results)

  • [Journal Article] Krein's formula for indefinite multipliers in linear periodic Hamiltonian systems2006

    • Author(s)
      M.Kuwamura, E.Yanagida
    • Journal Title

      J. Differential Equations 230

      Pages: 446-464

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Optimal lower bound of the grow-up rate for a supercritical parabolic equation2006

    • Author(s)
      M.Fila, J.R.King, M.Winkler, E.Yanagida
    • Journal Title

      J. Differential Equations 228

      Pages: 339-356

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Structure of the sets of regular and singular radial solutions for a semilinear elliptic equation2006

    • Author(s)
      J.-L.Chern, E.Yanagida
    • Journal Title

      J. Differential Equations 224

      Pages: 440-463

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Minimization of the principal eigenvalue for an elliptic boundary value problem with indefinite weight and applications to population dynamics2006

    • Author(s)
      Y.Lou, E.Yanagida
    • Journal Title

      Japan J. Indust. Appl. 223

      Pages: 275-292

    • NAID

      10018823524

    • Related Report
      2006 Annual Research Report
  • [Journal Article] The dynamics of a kinetic activator-inhibitor systems2006

    • Author(s)
      W.-M.Ni, K.Suzu, I, I.Takagi
    • Journal Title

      J. Differential Equations 229

      Pages: 426-465

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Interacting Spots in reaction diffusion systems2006

    • Author(s)
      S.-I.Ei, M.Mimura, M.Nagayama
    • Journal Title

      Discrete and Continuous Dynamical Systems 14

      Pages: 31-62

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Entire solutions with merging fronts to reaction-diffusion equations2006

    • Author(s)
      Y.Morita, H.Ninomiya
    • Journal Title

      J. Dynamics and Differential Equations 18

      Pages: 841-861

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Entire solutions of reaction-diffusion equations with balanced bistable nonlinearities2006

    • Author(s)
      X.-F.Chen, J.-S.Guo, H.Ninomiya
    • Journal Title

      Proceedings of the Royal Society of Edinburgh. Sect. A. 136A

      Pages: 1207-1237

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Diffusion, cross-diffusion and competitive interaction2006

    • Author(s)
      M.lida, M.Mimura, H.Ninomiya
    • Journal Title

      J. Math. Biol. 53

      Pages: 617-641

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Global stability of traveling curved fronts in the Allen-Cahn equations2006

    • Author(s)
      H.Ninomiya, M.Taniguchi
    • Journal Title

      Discrete and continuous dynamical systems 15

      Pages: 819-832

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Traveling curved fronts of anisotropic curvature flows2006

    • Author(s)
      Y.Marutani, H.Ninomiya, R.Weidenfeld
    • Journal Title

      Japan J. Indust. Appl. Math. 23

      Pages: 83-104

    • NAID

      10018138709

    • Related Report
      2006 Annual Research Report
  • [Journal Article] On p-homogeneous systems of differential equations and their linear perturbations2006

    • Author(s)
      H.Ninomiya, H.F.Weinberger
    • Journal Title

      Applicable Analysis 85

      Pages: 225-246

    • Related Report
      2006 Annual Research Report
  • [Journal Article] A Liouville property and quasiconvergence for a semilinear heat equation2005

    • Author(s)
      P.Polacik, E.Yanagida
    • Journal Title

      Journal of Differential Equations 208

      Pages: 194-214

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Stability of stationary interfaces of binary-tree type2005

    • Author(s)
      R.Ikota, E.Yanagida
    • Journal Title

      Calculus of Variations and Partial Differential Equations 22

      Pages: 375-389

    • NAID

      120000981472

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Structure of the solution set for a vector-valued boundary value problem with a Lipschit nonlinear term2005

    • Author(s)
      T.Sato, E.Yanagida
    • Journal Title

      Nonlinear Analysis 61

      Pages: 551-557

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Structure of positive radial solutions including singular solutions to Matukuma's equation2005

    • Author(s)
      H.Morishita, E.Yanagida, S.Yotsutani
    • Journal Title

      Communications on Pure and Applied Analysis 4

      Pages: 871-888

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Convergence rate for a parabolic equation with supercritical nonlinearity2005

    • Author(s)
      M.Fila, M.Winkler, E.Yanagida
    • Journal Title

      Journal of Dynamics and Differential Equations 17

      Pages: 249-269

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A variational approach to singular perturbation problems in Reaction-diffusion systems2005

    • Author(s)
      S.-I.Ei, M.Kuwamura, Y.Morita
    • Journal Title

      Physica D 207

      Pages: 171-219

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Nonstabilizing solutions and grow-up set for a supercritical semilinear diffusion equation2004

    • Author(s)
      P.Polacik, E.Yanagida
    • Journal Title

      Diff.Int.Eqs. 17

      Pages: 535-548

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Uniqueness and profile of solutions for a superlinear elliptic equation2004

    • Author(s)
      Y.Kabeya, E.Yanagida
    • Journal Title

      Adv.Diff.Eqs. 9

      Pages: 771-796

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Grow-up Rate of Solutions for a Supercritical Semilinear Diffusion Equation2004

    • Author(s)
      M.Fila, M.Winkler, E.Yanagida
    • Journal Title

      J.Diff.Eqs. 205

      Pages: 365-389

    • Related Report
      2004 Annual Research Report
  • [Journal Article] A Liouville property and quasiconvergence for a semilinear heat equation2004

    • Author(s)
      P.Polacik, E.Yanagida
    • Journal Title

      J.Diff.Eqs. 208

      Pages: 194-214

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Inward linear perturbation can produce unbounded solutions2004

    • Author(s)
      H.Ninomiya, H.Weinberger
    • Journal Title

      Math.Methods Appl.Sci. 27

      Pages: 1815-1818

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Some entire solutions of the Allen-Cahn equation2004

    • Author(s)
      Y.Fukao, Y.Morita, H.Ninomiya
    • Journal Title

      Taiwanise J.Math. 8

      Pages: 15-32

    • Related Report
      2004 Annual Research Report
  • [Book] 爆発と凝集2006

    • Author(s)
      柳田英二 編著
    • Total Pages
      214
    • Publisher
      東大出版会
    • Related Report
      2005 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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