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2010 Fiscal Year Annual Research Report

微分方程式論からみた生物のパターン形成―分析から総合へ

Research Project

Project/Area Number 22244010
Research Category

Grant-in-Aid for Scientific Research (A)

Research InstitutionTohoku University

Principal Investigator

高木 泉  東北大学, 大学院・理学研究科, 教授 (40154744)

Co-Investigator(Kenkyū-buntansha) 小川 卓克  東北大学, 大学院・理学研究科, 教授 (20224107)
池田 榮雄  富山大学, 大学院・理工学研究部, 教授 (60115128)
長澤 壯之  埼玉大学, 大学院・理工学研究科, 教授 (70202223)
柳田 英二  東京工業大学, 大学院・理工学研究科, 教授 (80174548)
Keywords反応拡散系 / パターン形成 / 楕円形偏微分方程式 / 曲線の変形・運動 / 空間の非均一性 / 放物型偏微分方程式 / ヒドラ頭部再生モデル
Research Abstract

本研究は反応拡散方程式系が生成するパターンの分類と,曲線や曲面の曲げエネルギー解放による変形に関する系統的な知見を確立することを目指して行うものである.発生生物学の形態形成モデルとして約40年前に提唱された活性因子-抑制因子系は典型的な反応拡散系であり,研究の蓄積も多い.まず,この方程式系を反応力学の大域構造をより詳細に調べ,複数の平衡解がある場合に,安定多様体,不安定多様体の構造が分かった(高木).拡散方程式と常微分方程式の連立方程式で記述される新しいタイプの数理モデルを提唱したHeidelberg大学のAnna Marciniak-Czochra博士を招き,ワークショップ"Modeling,Simulations and Analysis of Biological Pattern Formation"を開催し,本研究の分担者,連携研究者と情報を共有した.
通常生命現象は不均一な環境で起り,非一様な媒体中のパターン形成は重要である.池田は,進行波解と空間の不均一性との相互作用を縮約系を導出して考察し,中島は,多次元領域での定常パターンの構造を調べた,小川は,非線型拡散方程式の解法において基礎的な役割を果たす最大正則性原理をBesov空間で確立し,臨界状況の解明に道を開いた.曲線の変形の問題に取組んだ長澤は,平面閉曲線に対し,複数の制約条件下での曲率積分の勾配流の解の存在と一意性を考察し,線型化作用素のスペクトルの構造を明らかにした.岡部は,非閉曲線に対し,短縮化-平坦化流の解の存在を示した.柳田は単独半線型拡散方程式の動的特異点をもつ解の漸近挙動を考察し,収束率が異なる二種類の特異解に分類されることを証明した.シミュレーション担当の上山は,自己組織化機構を利用したメッシュ生成手法を開発した.また,山田は空間グラフの全曲率を定義し,それにより空間グラフの位相的な特徴付けを与えた.

  • Research Products

    (37 results)

All 2011 2010 Other

All Journal Article (12 results) (of which Peer Reviewed: 11 results) Presentation (24 results) Remarks (1 results)

  • [Journal Article] Asymptotic distribution of eigenvalues of Hill's equation with integrable potential under periodic condition2011

    • Author(s)
      T.Nagasawa, T.Ohrui
    • Journal Title

      Saitama Mathematical Journal

      Volume: 27 Pages: 1-8

    • Peer Reviewed
  • [Journal Article] Singular backward self-similar solutions of a semilinear parabolic equation2011

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

      Discrete Cont.Dynamical Systems-S

      Volume: 4 Pages: 897-906

    • Peer Reviewed
  • [Journal Article] Homoclinic and heteroclinic orbits for a semilinear parabolic equation2011

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

      Tohoku Mathematical Journal

      Volume: 63 Pages: 561-579

    • Peer Reviewed
  • [Journal Article] The existence and convergence of the shortening-straightening flow fornon-closed planar curves with fixed boundary2011

    • Author(s)
      Shinya Okabe
    • Journal Title

      Gakuto International Series, Mathematical Sciences and applications, Internal Symposium on Computational Science 2011

      Volume: 34 Pages: 1-23

    • Peer Reviewed
  • [Journal Article] Transition layers for a spatially inhomogeneous AUen-Cahn equation in multi-dimensional domains2011

    • Author(s)
      Fang Li, Kimie Nakashima
    • Journal Title

      Discrete and Continuous Dynamical Systems

      Volume: 32 Pages: 1391-1420

    • Peer Reviewed
  • [Journal Article] On the role of basic production terms in an activator-inhibitor system modeling biological pattern formation2011

    • Author(s)
      Kanako Suzuki, Izumi Takagi
    • Journal Title

      Funkcialaj Ekvacioj

      Volume: 54 Pages: 237-274

    • Peer Reviewed
  • [Journal Article] Local uniformization and free boundary regularity of minimal singular surfaces2011

    • Author(s)
      Chikako Mese, Sumio Yamada
    • Journal Title

      Journal of Geometric Analysis

      Volume: 21 Pages: 743-766

    • Peer Reviewed
  • [Journal Article] Front Dynamics in heterogeneous diffusive media2010

    • Author(s)
      Ikeda, H., Ei, S,-I.
    • Journal Title

      Pbysica D

      Volume: 239 Pages: 1637-1649

    • Peer Reviewed
  • [Journal Article] End-point maximal regularity and wellposedness of the two dimensional Keller-Segel system in a critical Besov space2010

    • Author(s)
      T.Ogawa, S.Shimizu
    • Journal Title

      Math.Z.

      Volume: 264 Pages: 601-628

    • Peer Reviewed
  • [Journal Article] Interpolation inequality of logarithmic type in the abstract Besov spaces and application to semilinear evolution equations2010

    • Author(s)
      T.Matsumoto, T.Ogawa
    • Journal Title

      Math.Nachr.

      Volume: 283 Pages: 1-19

    • Peer Reviewed
  • [Journal Article] Gray-Scottモデルの概要2010

    • Author(s)
      上山大信
    • Journal Title

      京都大学数理解析研究所講究録

      Volume: 1680 Pages: 1-4

  • [Journal Article] An indefinite nonlinear diffusion problem in population genetics, I : Existence and limiting profiles2010

    • Author(s)
      Linlin Su, Kimie Nakashima, Wei-Ming Ni
    • Journal Title

      Discrete and Continuous Dynamical Systems-Series A

      Volume: 27 Pages: 617-641

    • Peer Reviewed
  • [Presentation] Asymptotic behavior of singular solutions for a semilinear parabolic equation2011

    • Author(s)
      Eiji Yanagida
    • Organizer
      Second Italian-Japanese Workshop "Geometric Properties for Elliptic and Parabolic PDE's"
    • Place of Presentation
      Cotrona, Italy
    • Year and Date
      2011-06-21
  • [Presentation] The existence of shortening-straightening flow for non-closed planar curves with infinite length2011

    • Author(s)
      岡部真也
    • Organizer
      International Symposium on Computational Science 2011
    • Place of Presentation
      金沢大学
    • Year and Date
      2011-02-15
  • [Presentation] Semiclassical and zero relaxation limit for the quantum drift-diffusion system2011

    • Author(s)
      Takayoshi Ogawa
    • Organizer
      19tb Workshop on Differential Equations and its Applications
    • Place of Presentation
      National Cheng Kung University, Tainan, Taiwan
    • Year and Date
      2011-01-16
  • [Presentation] Dynamics of traveling fronts in some heterogeneous diffusive media2011

    • Author(s)
      Ikeda, H.
    • Organizer
      19th Workshop on Differential Equations and its Applications
    • Place of Presentation
      National Cheng Kung University, Tainan, Taiwan
    • Year and Date
      2011-01-15
  • [Presentation] Shortening-straightening flowによって支配される無限の長さをもつ平面曲線の挙動2010

    • Author(s)
      岡部真也
    • Organizer
      関数解析と実解析による微分方程式
    • Place of Presentation
      かんぽの宿松島
    • Year and Date
      2010-12-26
  • [Presentation] Mathematical model or Liesegang type precipitation2010

    • Author(s)
      Daishin Ueyama
    • Organizer
      Inorganic Nanowires : Syntheses and Growth Mechanisms, The International Chemical Congress of Pacific Basin Societies
    • Place of Presentation
      Hawaii Convention Center 304A, Honolulu, Hawai, USA
    • Year and Date
      2010-12-18
  • [Presentation] Uniformization of minimal singlular surfaces2010

    • Author(s)
      Sumio Yamada
    • Organizer
      Workshop on Teichmuller Theory
    • Place of Presentation
      Oberwolfach数学研究所,ドイツ
    • Year and Date
      2010-12-01
  • [Presentation] "Where's the peak?":極大点の在処を求めて2010

    • Author(s)
      高木泉
    • Organizer
      数学の展開…諸分野との連携を探る
    • Place of Presentation
      東北大学理学部
    • Year and Date
      2010-11-28
  • [Presentation] The n-dimensional Helfrich flow2010

    • Author(s)
      Takeyuki Nagasawa
    • Organizer
      International Workshop on PDE "Concentration and Related Topics in Nonlinear Problems"
    • Place of Presentation
      東北大学理学部
    • Year and Date
      2010-11-22
  • [Presentation] Location of layers for a spatially inhomogeneous balanced bistable equation2010

    • Author(s)
      Kimie Nakashima
    • Organizer
      非線形解析と可積分系の数理
    • Place of Presentation
      龍谷大学
    • Year and Date
      2010-11-18
  • [Presentation] Global structure of traveling wave solutions in bistable reaction-diffusion systems2010

    • Author(s)
      Ikeda, H.
    • Organizer
      散逸系の数理--解構造と大域挙動--structures of Attractors in Dissipative Systems
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2010-11-17
  • [Presentation] Attractors of an activator-inhibitor system in homogeneous media and an application2010

    • Author(s)
      Izumi Takagi
    • Organizer
      Dissipative Systems…Attractors and Global Behavior…
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2010-11-16
  • [Presentation] A mathematical model of Liesegang type precipitation2010

    • Author(s)
      Daishin Ueyama
    • Organizer
      Mini-Workshop on Modeling, Simulations and Analysis of Biological Pattern Formation
    • Place of Presentation
      ハーネル仙台
    • Year and Date
      2010-10-29
  • [Presentation] An application of the self-organizing mechanism in the reaction-diffusion systems2010

    • Author(s)
      Daishin Ueyama
    • Organizer
      International Workshop on Pattern Formation in Chemical and Biological Systems
    • Place of Presentation
      Eotvos University, Budapest, Hungary
    • Year and Date
      2010-10-26
  • [Presentation] One of the applications of the self-replicating mechanism in some reaction-diffusion systems2010

    • Author(s)
      Daishin Ueyama
    • Organizer
      Reaction-Diffusion Systems : Experiments, Modeling and Analysisi
    • Place of Presentation
      Paris-Sud 11, Orsay, France
    • Year and Date
      2010-10-22
  • [Presentation] The motion of non-closed planar curves governed by shortening-straight ening flow2010

    • Author(s)
      岡部真也
    • Organizer
      現象の数理解析に向けた非線形発展方程式とその周辺
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2010-10-13
  • [Presentation] n-dimensional Helfrich flow2010

    • Author(s)
      長澤壯之
    • Organizer
      The Sixth "Topics in Nonlinear Problems"
    • Place of Presentation
      山口大学理学部
    • Year and Date
      2010-09-18
  • [Presentation] Breakdown of pattern formation in activator-inhibitor systems and unfolding of a singular equilibrium2010

    • Author(s)
      Izumi Takagi
    • Organizer
      Partial Differential Equations in Mathematical Biology
    • Place of Presentation
      Bedlewo Conference Center,ポーランド
    • Year and Date
      2010-09-13
  • [Presentation] 非一様拡散場に現れる様々なダイナミクス~大域的解構造に向けて~2010

    • Author(s)
      池田榮雄
    • Organizer
      第4回応用数理研究会
    • Place of Presentation
      ニューサンピア敦賀
    • Year and Date
      2010-08-19
  • [Presentation] Collapse of patterns in activator-inhibitor systems2010

    • Author(s)
      I.Takagi
    • Organizer
      Fourth International Conference on Recent Advances in Applied Dynamical Systems
    • Place of Presentation
      浙江師範大学,金華,中国
    • Year and Date
      2010-06-19
  • [Presentation] Transition layers for a spatially inhomogeneous Allen-Cahn equation in multi-dimensional domains2010

    • Author(s)
      Kimie Nakashima
    • Organizer
      Nonlinear Evolution PDEs and their Equilibrium States
    • Place of Presentation
      早稲田大学
    • Year and Date
      2010-06-11
  • [Presentation] Gradient flow for the Helfrich variational problem2010

    • Author(s)
      長澤壯之
    • Organizer
      New Trends of Variational Problems
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2010-06-07
  • [Presentation] Traveling front dynamics in some heterogeneous diffusive media2010

    • Author(s)
      Ikeda, H.
    • Organizer
      The 8^<th> AIMS Conference on Dynamical Systems, Differential Equations and Applications
    • Place of Presentation
      Dresden University of Technology, Germany
    • Year and Date
      2010-05-26
  • [Presentation] The critical case of drift-diffusion system of degenerate type2010

    • Author(s)
      Takayoshi Ogawa
    • Organizer
      8^<th> AIMS International Conference on Dynamical Systems, Differential Equations and Applications
    • Place of Presentation
      Dresden University of Technology, Germany
    • Year and Date
      2010-05-26
  • [Remarks]

    • URL

      http://morpho.sci.tohoku.ac.jp/~morpho/

URL: 

Published: 2013-06-26  

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