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2014 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 InstitutionTohoku University

Principal Investigator

高木 泉  東北大学, 理学(系)研究科(研究院), 教授 (40154744)

Co-Investigator(Kenkyū-buntansha) 小川 卓克  東北大学, 理学(系)研究科(研究院), 教授 (20224107)
池田 榮雄  富山大学, 理工学研究部, 教授 (60115128)
長澤 壯之  埼玉大学, 理工学研究科, 教授 (70202223)
柳田 英二  東京工業大学, 理工学研究科, 教授 (80174548)
Project Period (FY) 2010-04-01 – 2015-03-31
Keywords反応拡散系 / パターン形成 / 曲面・曲線の変形 / 空間的不均一性
Outline of Annual Research Achievements

生物の発生段階で繰り広げられる形態形成の過程を数理モデルを通して理解するために必要な数学的理論の構築を目指して研究を行ってきた.本年度は最終年度であるため,研究成果の総括として国際研究集会を開いた.
研究代表者は,不均一な環境でのスパイク状パターンに注目し「位置決め函数」を導入してスパイクの位置を特定する方法を見つけ,その応用として,予め決めた場所にスパイクが出現するように制御する方法を考案した.小川は走化性モデルの解の挙動を分ける閾値となる指標を抽出することに成功した.池田は有害藻類の開花現象を説明するために三種からなる拡散反応系を考案し,その性質をある極限系の場合に調べた.長澤は曲線の運動を考察するため,結び目のエネルギーの一つであるメビウスエネルギーに着目し,それを不変にする変換によって函数空間を分解し,見通しよく変分公式を導出することに成功した.柳田は藤田型の非線型拡散方程式に対し,非収束解や非有界解の存在と性質を調べた,.またフィッシャー型方程式に対し,空間的にゆっくり減衰する初期値に対する界面の挙動を調べ,ハミルトン・ヤコビ方程式との関連を明らかにした.
上山は,パターン形成問題の応用として腹足類の運動,パニック状態における脱出時の出口付近の混雑,非一様場におけるスパイラルパターン生成の問題を考察した.岡部は,高階放物型方程式に対する障害物問題を考察し,障害物が一つの場合に長時間解が存在することを証明した.中島は,一次元区間上の遺伝子頻度モデルを研究し,多重遷移層をもつ定常解の存在,形状,安定性を解析しそれが唯一つの定常解であることを証明した.山田は,二次元および三次元多様体上の幾何学的構造の族について,多様体上の微分方程式系を用いて理解を深める研究を行った.二次元の場合には,ヒルベルト計量を介して,リーマン計量,共形構造に加えて射影構造を併せて考察した.

Research Progress Status

26年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

26年度が最終年度であるため、記入しない。

  • Research Products

    (43 results)

All 2015 2014 Other

All Journal Article (13 results) (of which Peer Reviewed: 13 results,  Acknowledgement Compliant: 1 results) Presentation (28 results) (of which Invited: 21 results) Remarks (2 results)

  • [Journal Article] Pattern formation in a diffusion-ODE model with hysteresis2015

    • Author(s)
      A. Marciniak-Czochra, M. Nakayama and I. Takagi
    • Journal Title

      Differential and Integral Equations

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] A decomposition theorem of the Moebius energy II: Variational formulae and estimates2015

    • Author(s)
      Aya Ishizeki and Takeyuki Nagasawa
    • Journal Title

      Math. Ann.

      Volume: 印刷中 Pages: 印刷中

    • DOI

      DOI 10.1007/s00208-015-1175-2

    • Peer Reviewed
  • [Journal Article] Convergence of equilibrium of gradient flows defined on planar curves2015

    • Author(s)
      M. Novaga and S. Okabe
    • Journal Title

      J. Reine Angew. Math.

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Extensions of the charged Riemannian Penrose inequality2015

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

      Class. Quantum Grav.

      Volume: 32 Pages: 該当せず

    • Peer Reviewed
  • [Journal Article] Local and global aspects of Weil-Petersson geometry2015

    • Author(s)
      Sumio Yamada
    • Journal Title

      Handbook of Teichmuller Theory

      Volume: IV Pages: 43-112

    • Peer Reviewed
  • [Journal Article] A decomposition theorem of the Moebius energy I: Decomposition and Moebius invariance2014

    • Author(s)
      Aya Ishizeki and Takeyuki Nagasawa
    • Journal Title

      Kodai Math. J.

      Volume: 37 Pages: 737--754

    • Peer Reviewed
  • [Journal Article] Non-accessible singular homoclinic orbits for semilinear parabolic equation2014

    • Author(s)
      Marek Fila and Eiji Yanagida
    • Journal Title

      Differential and Integral Equations

      Volume: 27 Pages: 563-578

    • Peer Reviewed
  • [Journal Article] Global unbounded solutions of the Fujita equation in the intermediate range2014

    • Author(s)
      Peter Polacik and Eiji Yanagida
    • Journal Title

      Math. Ann.

      Volume: 360 Pages: 255-266

    • Peer Reviewed
  • [Journal Article] Localized solutions of a semilinear parabolic equation with a recurrent nonstationary asymptotics2014

    • Author(s)
      Peter Polacik and Eiji Yanagida
    • Journal Title

      SIAM J. Math. Anal.

      Volume: 46 Pages: 3481-3496

    • Peer Reviewed
  • [Journal Article] Spontaneous formation of unidirectional path2014

    • Author(s)
      Mayuko Iwamoto, Nobuhiko J. Suematsu, and Daishin Ueyama
    • Journal Title

      Chemical Physics Letters

      Volume: 616-617 Pages: 248-253

    • DOI

      10.1016/j.cplett.2014.10.010

    • Peer Reviewed
  • [Journal Article] Maze solving using fatty acid chemistry2014

    • Author(s)
      Kohta Suzuno, Daishin Ueyama, Michael Branicki, Rita Toth, Artur Braun and Istvan Lgzi
    • Journal Title

      Langmuir

      Volume: 30 Pages: 9251-9255

    • DOI

      10.1021/la5018467

    • Peer Reviewed
  • [Journal Article] The advantage of Mucus for adhesive locomotion in gastropods2014

    • Author(s)
      Mayuko Iwamoto, Daishin Ueyama and Ryo Kobayashi
    • Journal Title

      Journal of Theoretical Biology

      Volume: 353 Pages: 133-141

    • DOI

      10.1016/j.jtbi.2014.02.024

    • Peer Reviewed
  • [Journal Article] Curve shortening-straightening flow for non-closed planar curves with infinite length2014

    • Author(s)
      M. Novaga and S. Okabe
    • Journal Title

      J. Differential Equations

      Volume: 256 Pages: 1093-1132

    • Peer Reviewed
  • [Presentation] A remark on the influence of spatial heterogeneity upon the formation of cell aggregates2015

    • Author(s)
      Izumi Takagi
    • Organizer
      Mini-workshop "Models of directional movement and their analysis"
    • Place of Presentation
      東北大学,数理科学記念館
    • Year and Date
      2015-03-27
  • [Presentation] 生物の形づくりの数理―Turingが残した課題―2015

    • Author(s)
      高木 泉
    • Organizer
      日本数学会2015年年会,企画特別講演
    • Place of Presentation
      明治大学駿河台キャンパス
    • Year and Date
      2015-03-24
    • Invited
  • [Presentation] Turing's unfinished project2015

    • Author(s)
      Izumi Takagi
    • Organizer
      PDE seminar
    • Place of Presentation
      Center for Partial Differential Equations, East China Normal University, Shanghai, China
    • Year and Date
      2015-03-09 – 2015-03-17
    • Invited
  • [Presentation] Decomposition of the Moebius energy and its consequences2015

    • Author(s)
      Takeyuki Nagasawa
    • Organizer
      The 32nd Kyushu Symposium on Partial Differential Equations
    • Place of Presentation
      九州大学,福岡
    • Year and Date
      2015-01-29
    • Invited
  • [Presentation] 点凝集現象を起こす反応拡散系のパターンの制御2015

    • Author(s)
      高木 泉
    • Organizer
      九州関数方程式セミナー
    • Place of Presentation
      福岡大学セミナーハウス
    • Year and Date
      2015-01-16
    • Invited
  • [Presentation] 空間的不均一性に基づく点凝集パターンの制御2014

    • Author(s)
      高木 泉
    • Organizer
      岡山駅前セミナー:現象を捉える新しい数学的基盤の構築に向けて
    • Place of Presentation
      岡山国際交流センター2階研修室
    • Year and Date
      2014-12-13
    • Invited
  • [Presentation] Dynamics of interfaces in the Fisher-KPP equation2014

    • Author(s)
      Eiji Yanagida
    • Organizer
      International Workshop on Nonlinear Partial Differential Equations
    • Place of Presentation
      岡山国際センター,岡山
    • Year and Date
      2014-12-10 – 2014-12-12
    • Invited
  • [Presentation] Variational formulae and estimates for decomposed Moebius energies2014

    • Author(s)
      Takeyuki Nagasawa
    • Organizer
      Shapes and other properties of solutions of PDEs
    • Place of Presentation
      京都大学数理解析研究所,京都
    • Year and Date
      2014-11-06
    • Invited
  • [Presentation] Variational characterizations of the static solutions to the Einstein-Maxwell equation2014

    • Author(s)
      Sumio Yamada
    • Organizer
      Mathematical Approaches to Pattern Formation
    • Place of Presentation
      東北大学,仙台
    • Year and Date
      2014-10-31
    • Invited
  • [Presentation] Control of patterns by way of spatial heterogeneity2014

    • Author(s)
      Izumi Takagi
    • Organizer
      Symposium on Mathematical Approaches to Pattern Formation
    • Place of Presentation
      東北大学,数理科学記念館
    • Year and Date
      2014-10-30
  • [Presentation] Stability and bifurcation properties of a standing spot solutions in 3-component FitzHugh-Nagumo systems2014

    • Author(s)
      Hideo Ikeda
    • Organizer
      Mathematical Approaches to Pattern Formation
    • Place of Presentation
      東北大学,仙台
    • Year and Date
      2014-10-29
    • Invited
  • [Presentation] Threshold for the global behavior of solution to degenerate Keller-Segel (drift-diffusion) system in between critical exponents2014

    • Author(s)
      Takayoshi Ogawa
    • Organizer
      Mathematical Approaches to Pattern Formation
    • Place of Presentation
      Tohoku University, Sendai, Japan
    • Year and Date
      2014-10-28 – 2014-10-31
    • Invited
  • [Presentation] Expanding patterns in the Fisher-KPP equation2014

    • Author(s)
      Eiji Yanagida
    • Organizer
      Mathematical Approaches to Pattern Formation
    • Place of Presentation
      Tohoku University, Sendai
    • Year and Date
      2014-10-28 – 2014-10-31
    • Invited
  • [Presentation] The obstacle problem for a fourth order parabolic equation2014

    • Author(s)
      S. Okabe
    • Organizer
      Mathematical Approaches to Pattern Formation
    • Place of Presentation
      東北大学,仙台
    • Year and Date
      2014-10-28 – 2014-10-31
    • Invited
  • [Presentation] Decomposition of Moebius energy and Moebius invariance of decomposed energies2014

    • Author(s)
      Takeyuki Nagasawa
    • Organizer
      Mathematical Approaches to Pattern Formation
    • Place of Presentation
      東北大学,仙台
    • Year and Date
      2014-10-28
    • Invited
  • [Presentation] Threshold for the large time behavior of solutions to degenerate drift-diffusion system in between critical exponents2014

    • Author(s)
      Takayoshi Ogawa
    • Organizer
      Mathematics for Fluid Dynamics
    • Place of Presentation
      Universite de Lyon I, Lyon, France
    • Year and Date
      2014-10-20 – 2014-10-23
    • Invited
  • [Presentation] 1-dim blooming solutions in a three species Lotka-Volterra system2014

    • Author(s)
      Hideo Ikeda
    • Organizer
      富山解析セミナー2014
    • Place of Presentation
      富山大学,富山
    • Year and Date
      2014-10-11
  • [Presentation] 四階放物型方程式に対する障害物問題2014

    • Author(s)
      岡部真也
    • Organizer
      日本数学会秋期総合分科会,特別講演
    • Place of Presentation
      広島大学,広島
    • Year and Date
      2014-09-25 – 2014-09-28
    • Invited
  • [Presentation] Control of patterns by spatial heterogeneity2014

    • Author(s)
      Izumi Takagi
    • Organizer
      HeKKSaGOn Summer School in Goettingen Inference on Pattern Formation: Applications to Biology and Materials Science
    • Place of Presentation
      Goettingen 大学,ドイツ
    • Year and Date
      2014-09-20
  • [Presentation] On a variational characterization of the exact solutions of the Einstein-Maxwell equation2014

    • Author(s)
      Sumio Yamada
    • Organizer
      MFO Workshop "Analysis, Geometry and Toplogy of Positive Scalar Curvature Metrics
    • Place of Presentation
      Oberwolfach Mathematical Institute, Germany
    • Year and Date
      2014-08-04
    • Invited
  • [Presentation] Role of spatial heterogeneity in pattern formation2014

    • Author(s)
      Izumi Takagi and Hiroko Yamamoto
    • Organizer
      Mini-Symposium "Challenges in mathematical modeling of pattern formation in developmental biology" in JSMB/SMB 2014 meeting
    • Place of Presentation
      大阪コンベンションセンター
    • Year and Date
      2014-07-30
  • [Presentation] Pattern formation without Turing instability2014

    • Author(s)
      Izumi Takagi
    • Organizer
      Mini-workshop on Modeling, Simulations and Analysis of Pattern Formation
    • Place of Presentation
      東北大学,数理科学記念館
    • Year and Date
      2014-07-26
  • [Presentation] メビウス・エネルギーの分解定理:幾何学的意味と解析的紅葉2014

    • Author(s)
      長澤壯之
    • Organizer
      東京大学応用解析セミナー
    • Place of Presentation
      東京大学,東京
    • Year and Date
      2014-07-24
    • Invited
  • [Presentation] 3成分FitzHugh-Nagumo 方程式系の2次元スポット解の安定性2014

    • Author(s)
      池田榮雄
    • Organizer
      自己組織化セミナー
    • Place of Presentation
      明治大学,東京
    • Year and Date
      2014-07-08
    • Invited
  • [Presentation] The obstacle problem for the parabolic biharmonic equation2014

    • Author(s)
      S. Okabe
    • Organizer
      京都大学 NLPDE セミナー
    • Place of Presentation
      京都大学,京都
    • Year and Date
      2014-06-27
    • Invited
  • [Presentation] Removable and non-removable singularities in parabolic equations2014

    • Author(s)
      Eiji Yanagida
    • Organizer
      Geometric Aspects of Semilinear Elliptic and Parabolic Equations, Recent Advances and Future Perspectives
    • Place of Presentation
      BIRS, Canada
    • Year and Date
      2014-05-26 – 2014-05-30
    • Invited
  • [Presentation] Existence of non-stabilizing solutions of a semilinear parabolic equation2014

    • Author(s)
      Eiji Yanagida
    • Organizer
      Seminar on PDE
    • Place of Presentation
      Academia Sinica, Taipei, Taiwan
    • Year and Date
      2014-04-23
  • [Presentation] Convex Bodies in the Euclidean, Spherical, Hyperbolic and Teichmuller Spaces2014

    • Author(s)
      Sumio Yamada
    • Organizer
      Master Class on Finsler Geometry and Applications
    • Place of Presentation
      Galatasaray University, Istanbul, Turkey
    • Year and Date
      2014-04-10 – 2014-04-14
    • Invited
  • [Remarks] 生物の形づくりの数理

    • URL

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

  • [Remarks] 生物の形づくりの数理

    • URL

      http://morphos.jp/

URL: 

Published: 2016-06-01  

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