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2010 Fiscal Year Self-evaluation Report

Structure of solution spaces for singular partial differential equations.

Research Project

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Project/Area Number 20540197
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Basic analysis
Research InstitutionSaga University

Principal Investigator

KAJIKIYA Ryuji  Saga University, 工学系研究科, 教授 (10183261)

Project Period (FY) 2008 – 2011
Keywords関数方程式 / 非線形偏微分方程式
Research Abstract

本研究の目的は,準線形楕円型偏微分方程式及び準線形放物型方程式の解空間の構造を明らかにすることである.特に,以下のような3種類の特異偏微分方程式を研究する
(1)係数が境界に特異性を持つ楕円型方程式についての研究を行う.係数が領域の境界に特異性を持っていても零ディリクレ境界条件のため,滑らかな解の存在が期待できる.従来の研究は,領域が単位球の場合であり,係数関数がべき乗の特異性を持つものであった.これを一般の領域に拡張し,さらに一般の特異性を持つ係数関数を考察することが本研究の目的である
(2)係数関数が特異性を持つ1次元pラプラス方程式に対して,解の分岐が起きることを証明する.微分作用素が準線形であるため,リアプノブ・シュミットの方法が使用しづらい.そのため写像度を利用し,Rabinowitzの大域分岐理論を使って分岐を示す
(3)無限大ラプラス作用素を持つ放物型方程式は,粘性解の理論により,解の存在・一意性・大域的存在が既に知られている.この方程式の解が時刻無限大で減衰することを証明し,その減衰度が時刻の負べき乗であることを証明し,それが最良指数であることを示す.さらに解の漸近挙動及び適当な変数変換の下での定常解の安定性を調べる

  • Research Products

    (10 results)

All 2010 2009 2008

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (5 results)

  • [Journal Article] Superlinear elliptic equations with singular coefficients on the boundary.2010

    • Author(s)
      R.Kajikiya
    • Journal Title

      Nonlinear Analysis, T.M.A. 73, (No.7)

      Pages: 2117-2131

    • Peer Reviewed
  • [Journal Article] A priori estimates of positive solutions for sublinear elliptic equations.2009

    • Author(s)
      R.Kajikiya
    • Journal Title

      Trans.Amer.Math.Soc. 361 (No.7)

      Pages: 3793-3815

    • Peer Reviewed
  • [Journal Article] Bifurcation of sign-changing solutions for one-dimensional p-Laplacian with a strong singular weight ; p-sublinear at infinity.2009

    • Author(s)
      R.Kajikiya, Yong-Hoon Lee, Inbo Sim
    • Journal Title

      Nonlinear Analysis, T.M.A. 71 (No.3-4)

      Pages: 1235-1249

    • Peer Reviewed
  • [Journal Article] Asymptotic behavior of viscosity solutions for a degenerate parabolic equation associated with the infinity-Laplacian.2009

    • Author(s)
      G.Akagi, P.Juutinen, R.Kajikiya
    • Journal Title

      Math.Ann. 343 (No.4)

      Pages: 921-953

    • Peer Reviewed
  • [Journal Article] One-dimensional $p$-Laplacian with a strong singular indefinite weight, I.Eigenvalue.2008

    • Author(s)
      R.Kajikiya, Yong-Hoon Lee, Inbo Sim
    • Journal Title

      Journal of Differential Equations 244 (No.8)

      Pages: 1985-2019

    • Peer Reviewed
  • [Presentation] Stability of solutions for fast diffusion equations2010

    • Author(s)
      梶木屋龍治
    • Organizer
      微分方程式の総合的研究
    • Place of Presentation
      京都大学
    • Year and Date
      20101218-19
  • [Presentation] Bifurcation of a positive solution for one-dimensional p-Laplacian.2010

    • Author(s)
      R.Kajikiya
    • Organizer
      慶應義塾大学
    • Place of Presentation
      日本数学会
    • Year and Date
      20100324-20100327
  • [Presentation] Mountain pass theorem in ordered Banach spaces and its applications.2009

    • Author(s)
      R.Kajikiya
    • Organizer
      Equadidff 12.
    • Place of Presentation
      Masaryk University, Brno, Czech Republic
    • Year and Date
      20090720-20090724
  • [Presentation] Mountain pass theorem in ordered Banach spaces and its applications.2009

    • Author(s)
      R.Kajikiya
    • Organizer
      International Workshop on Nonlinear PDE and Applications.
    • Place of Presentation
      Pusan National University, Pusan, Korea
    • Year and Date
      20090629-20090702
  • [Presentation] Sublinear elliptic equations with singularity on the boundary.2008

    • Author(s)
      R.Kajikiya
    • Organizer
      Intensive Lecture Program Cand International Conference on Nonlinear PDE and Applications.
    • Place of Presentation
      Pusan National University, Pusan, Korea
    • Year and Date
      20080609-20080613

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Published: 2012-02-13   Modified: 2016-04-21  

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