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2009 Fiscal Year Annual Research Report

特異な係数を持つ確率偏微分方程式の研究

Research Project

Project/Area Number 21654021
Research InstitutionThe University of Tokyo

Principal Investigator

舟木 直久  The University of Tokyo, 大学院・数理科学研究科, 教授 (60112174)

Co-Investigator(Kenkyū-buntansha) 俣野 博  東京大学, 大学院・数理科学研究科, 教授 (40126165)
Keywords確率論 / 解析学 / 確率偏微分方程式
Research Abstract

1.研究代表者の舟木は、連携研究者の謝氏(信州大学)らとともに、2次元ヤング図形の時間発展モデルの非平衡揺動極限について調べた。舟木は別途、2次元ヤング図形の運動から、適当な時空のスケール極限を経て非線形偏微分方程式が導かれることを示しているが、ここではその非線形偏微分方程式の解の周辺の揺動を調べ、それが無限次元空間上のOrnstein-Uhlenbeck型確率偏微分方程式によって記述されることを予想し、その係数作用素を決定する方向で研究を進めた。得られた結果および予想は、英国ケンブリッジ大学アイザック・ニュートン数理科学研究所における研究プログラム「確率偏微分方程式(Stochastic Partial Differential Equations)」とそれに関連する研究集会等において発表した。
2.連携研究者の乙部氏(信州大学)が行ったレビー型ノイズを持つ確率偏微分方程式やベッセル過程に対するシミュレーションに基づき、考察を行っている。
3.研究分担者の俣野は、Allen-Cahn型方程式の平面波の安定性を論じた。すなわち、遠方で減衰する摂動や、概周期的な摂動のクラスを考え、摂動を受けた界面が空間全体で一様に平面波に収束することを示した。また、調和写像に付随した熱方程式の爆発問題を考察し、2次元円板から球面への調和写像に付随した熱方程式の回転対称解の爆発のオーダーが自己相似爆発よりはるかに速いことを示した。俣野はさらに、障害物にぶつかる拡散進行波、超臨界型非線形熱方程式の解の爆発等を調べた。

  • Research Products

    (28 results)

All 2010 2009 Other

All Journal Article (12 results) (of which Peer Reviewed: 12 results) Presentation (15 results) Remarks (1 results)

  • [Journal Article] Hydrodynamic limit for an evolutional model of two-dimensional Young diagrams2010

    • Author(s)
      T.Funaki
    • Journal Title

      Comm.Math.Phys. (掲載確定)

    • Peer Reviewed
  • [Journal Article] Scaling limits for weakly pinned random walks with two large deviation minimizers2010

    • Author(s)
      T.Funaki
    • Journal Title

      J.Math.Soc.Japan 62(掲載確定)

    • Peer Reviewed
  • [Journal Article] Convergence and sharp thresholds for propagation in Nonlinear diffusion problems2010

    • Author(s)
      Y.Du(H.Matano)
    • Journal Title

      J.Eur.Math.Soc. (掲載確定)

    • Peer Reviewed
  • [Journal Article] A variational problem associated with the minimal speed of travelling waves for spatially periodic reaction-diffusion equations2010

    • Author(s)
      X.Liang(H.Matano)
    • Journal Title

      Trans.Amer.Math.Soc. (掲載確定)

    • Peer Reviewed
  • [Journal Article] Dynamical structure of some nonlinear degenerate diffusion equations2010

    • Author(s)
      H.Matano
    • Journal Title

      J.Dynamics and Differential Equations (掲載確定)

    • Peer Reviewed
  • [Journal Article] Stochastic analysis on large scale interacting systems2009

    • Author(s)
      T.Funaki
    • Journal Title

      Selected Papers on Probab.and Statis., Translations(Amer.Math.Soc.) 227

      Pages: 49-73

    • Peer Reviewed
  • [Journal Article] Concentration under scaling limits for weakly pinned Gaussian random walks2009

    • Author(s)
      E.Bolthausen(T.Funaki)
    • Journal Title

      Probab.Theory Relat.Fields 143

      Pages: 441-480

    • Peer Reviewed
  • [Journal Article] A stochastic heat equation with the distributions of Levy processes as its invariant measures2009

    • Author(s)
      T.Funaki
    • Journal Title

      Stoch.Proc.Appl. 119

      Pages: 307-326

    • Peer Reviewed
  • [Journal Article] Classification of Type I and Type II behaviors for a supercritical nonlinear heat equation2009

    • Author(s)
      H.Matano
    • Journal Title

      J.Funct.Anal. 256

      Pages: 992-1064

    • Peer Reviewed
  • [Journal Article] Bistable travelling waves around an obstacle2009

    • Author(s)
      H.Berestycki(H.Matano)
    • Journal Title

      Comm.Pure Appl.Math. 62

      Pages: 729-788

    • Peer Reviewed
  • [Journal Article] The radius of vanishing bubbles in equivariant harmonic map flow from D^2 to S^22009

    • Author(s)
      S.B.Angenent(H.Matano)
    • Journal Title

      SIAM J.Math.Anal. 41

      Pages: 1121-1137

    • Peer Reviewed
  • [Journal Article] Stability of planar waves in the Allen-Cahn equation2009

    • Author(s)
      H.Matano
    • Journal Title

      Comm.Partial Differential Equations 34

      Pages: 976-1002

    • Peer Reviewed
  • [Presentation] Brascamp-Lieb inequality and its applications to Wiener integrals for centered Bessel processes2010

    • Author(s)
      舟木直久
    • Organizer
      Welsh Probability Seminar
    • Place of Presentation
      Swansea University(英国・スワンジー)
    • Year and Date
      2010-03-05
  • [Presentation] Brascamp-Lieb inequality and its applications to Wiener integrals for centered Bessel processes2010

    • Author(s)
      舟木直久
    • Organizer
      Stochastic Analysis Seminar
    • Place of Presentation
      School of Math., Loughborough Univ.(英国・ラフボロ)
    • Year and Date
      2010-02-25
  • [Presentation] Hydrodynamic limit for surface diffusion in 2D Young diagrams2010

    • Author(s)
      舟木直久
    • Organizer
      Probability Forum
    • Place of Presentation
      Warwick University(英国・ウォーリック)
    • Year and Date
      2010-02-24
  • [Presentation] Brascamp-Lieb inequality and Wiener integrals for centered Bessel processes2010

    • Author(s)
      舟木直久
    • Organizer
      Stochastic Partial Differential Equations Seminar
    • Place of Presentation
      Isaac Newton Institute for Math.Sci., Cambridge University(英国・ケンブリッジ)
    • Year and Date
      2010-02-23
  • [Presentation] Scaling limits for a dynamic model of 2D Young diagrams2010

    • Author(s)
      舟木直久
    • Organizer
      The First CREST-SBM International Conference"Random Media"
    • Place of Presentation
      仙台国際センター
    • Year and Date
      2010-01-26
  • [Presentation] 2次元ヤング図形の時間発展モデルに対する流体力学極限2010

    • Author(s)
      舟木直久
    • Organizer
      京都大学理学研究科談話会
    • Place of Presentation
      京都大学理学研究科
    • Year and Date
      2010-01-20
  • [Presentation] Scaling limits for a dynamic model of 2D Young diagrams2010

    • Author(s)
      舟木直久
    • Organizer
      Workshop : Stochastic Partial Differential Equations
    • Place of Presentation
      Isaac Newton Institute for Math.Sci., Cambridge University(英国・ケンブリッジ)
    • Year and Date
      2010-01-04
  • [Presentation] Homogenization limit of reccurent traveling waves in a 2D cylinder with saw-toothed boundary2009

    • Author(s)
      俣野博
    • Organizer
      The Second Chile-Japan Workshop on Nonlinear Elliptic and Parabolic PDEs
    • Place of Presentation
      明治大学
    • Year and Date
      20091200
  • [Presentation] Front propagation in spatially ergodic media2009

    • Author(s)
      俣野博
    • Organizer
      Conference on Mathematical Challenges Motivated by Multi-Phase Materials
    • Place of Presentation
      Anogia(ギリシャ)
    • Year and Date
      20090600
  • [Presentation] Mathematical Analysis of a 3D Model of Cellular Electrophysiology2009

    • Author(s)
      俣野博
    • Organizer
      Workshop on Reaction-Diffusion Systems : Modelling and Analysis
    • Place of Presentation
      Orsay(フランス)
    • Year and Date
      20090600
  • [Presentation] 流体力学極限--非線形偏微分方程式のミクロな相互作用系からの導出2009

    • Author(s)
      舟木直久
    • Organizer
      CREST「現代数学解析による流体工学の未解決問題への挑戦」立上げ研究集会
    • Place of Presentation
      早稲田大学理工学部
    • Year and Date
      2009-11-20
  • [Presentation] Scaling limits for weakly pinned random walks with two large deviation minimizers2009

    • Author(s)
      舟木直久
    • Organizer
      13th Brazilian School of Probability
    • Place of Presentation
      ブラジル・マレシアス
    • Year and Date
      2009-08-06
  • [Presentation] Hydrodynamic limit for an evolutional model of 2D Young diagrams2009

    • Author(s)
      舟木直久
    • Organizer
      27th Brazilian Mathematics Colloquium, Probability Session
    • Place of Presentation
      ブラジル純粋・応用数学研究所(ブラジル・リオデジャネイロ)
    • Year and Date
      2009-07-31
  • [Presentation] A stochastic heat equation with the distributions of Levy processes as its invariant measures2009

    • Author(s)
      舟木直久
    • Organizer
      Workshop on Stochastic Partial Differential Equations
    • Place of Presentation
      山東大学威海校(中国・威海)
    • Year and Date
      2009-07-31
  • [Presentation] Hydrodynamic limit and nonlinear PDEs2009

    • Author(s)
      舟木直久
    • Organizer
      Mathematical Fluid Dynamics Launching Workshop
    • Place of Presentation
      早稲田大学理工学部
    • Year and Date
      2009-04-16
  • [Remarks]

    • URL

      http://www.ms.u-tokyo.ac.jp/~funaki/

URL: 

Published: 2011-06-16   Modified: 2016-04-21  

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