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2016 Fiscal Year Annual Research Report

Systematic studies on the profile and behavior of solutions of partial differential equations

Research Project

Project/Area Number 24244012
Research InstitutionTokyo Institute of Technology

Principal Investigator

柳田 英二  東京工業大学, 理学院, 教授 (80174548)

Co-Investigator(Kenkyū-buntansha) 仙葉 隆  福岡大学, 理学部, 教授 (30196985)
内藤 雄基  愛媛大学, 理工学研究科(理学系), 教授 (10231458)
壁谷 喜継  大阪府立大学, 工学(系)研究科(研究院), 教授 (70252757)
石渡 通徳  大阪大学, 基礎工学研究科, 教授 (30350458)
高坂 良史  神戸大学, 海事科学研究科, 准教授 (00360967)
Project Period (FY) 2012-05-31 – 2017-03-31
Keywords関数方程式 / 解析学 / 楕円型方程式 / 熱方程式 / 走化性方程式
Outline of Annual Research Achievements

楕円型方程式については、係数関数が非負であり零領域をもつ場合の解の事前評価に関し、スケーリング法を適用することによってある種のLiouville型問題に帰着されることを示すとともに、そのLiouville型定理を導いた。また、球面上の方程式の特異解の存在・非存在に関する問題や、球面上に小さな穴がある領域での正値解の構造の解明を行った。その他,非線型項の指数が空間変数に依存する場合について研究を進め,特に指数がソボレフ臨界指数を一点でとる場合、ソボレフ埋め込みのコンパクト性を保証するほぼ最良な減衰評価を得た。
放物型方程式については、まず逆二次のポテンシャル項をもつ線形熱方程式について、解の構造を明らかにした.また非線型項の指数が空間変数に依存する場合を扱い、非線型項がソボレフ臨界指数を持つ場合、時間大域解のソボレフノルムによる時間大域的有界性を導出した。その他、藤田型方程式に対し、特異定常解への収束の速さについて最良の評価を導き,また境界に動的特異性を保持する解が存在するための条件を明らかにした。
曲面の発展方程式である表面拡散方程式については定常曲面の安定性について研究を進め、円柱とアンデュロイドの安定性の判定条件をもとに、定常曲面が二つの平面に挟まれ、その平面に直角に交わる場合に対して大域的な分岐図を導出した。また、球面やノドイドの安定性の判定条件を導出した。
走化性方程式については、2次元円板上の非線形知覚関数を持つ走化性方程式系の球対称解について研究を行い、二つの方程式の時定数が大きく異なる場合について球対称解が時間大域的に存在し有界となるための知覚関数の条件を得た。この条件は、今まで知られている中で最良の条件である。

Research Progress Status

28年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

28年度が最終年度であるため、記入しない。

  • Research Products

    (39 results)

All 2017 2016

All Journal Article (10 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 10 results,  Open Access: 9 results) Presentation (28 results) (of which Int'l Joint Research: 13 results,  Invited: 24 results) Funded Workshop (1 results)

  • [Journal Article] Global existence and boundedness of radial solutions to a two dimensional fully parabolic chemotaxis system with general sensitivity2017

    • Author(s)
      Kentarou Fujie and Takasi Senba
    • Journal Title

      Nonlinearity

      Volume: 29 Pages: 2417~2450

    • DOI

      10.1088/0951-7715/29/8/2417

    • Peer Reviewed / Open Access
  • [Journal Article] A priori bounds for superlinear elliptic equations with semidefinite nonlinearity2017

    • Author(s)
      Yuki Naito, Takashi Suzuki and Yohei Toyota
    • Journal Title

      Nonlinear Anal.

      Volume: 151 Pages: 18~40

    • DOI

      10.1016/j.na.2016.11.016

    • Peer Reviewed / Open Access
  • [Journal Article] The heat kernel of a Schrodinger operator with inverse square potential2017

    • Author(s)
      Kazuhiro Ishige, Yoshitsugu Kabeya and El Maati Ouhabaz
    • Journal Title

      Proceedings of the London Mathematical Society

      Volume: 115 Pages: 381~410

    • DOI

      10.1112/plms.12041

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hardy type inequalities in Lp with sharp remainders2017

    • Author(s)
      Norisuke Ioku, Michinori Ishiwata and Tohru Ozawa
    • Journal Title

      J. Inequal. Appl.

      Volume: 2017 Pages: 1~7

    • DOI

      10.1186/s13660-016-1271-1

    • Peer Reviewed / Open Access
  • [Journal Article] Convergence rate to singular steady states in a semilinear parabolic equation2016

    • Author(s)
      M. Hoshino and E. Yanagida
    • Journal Title

      Nonlinear Analysis

      Volume: 131 Pages: 98~111

    • DOI

      10.1016/j.na.2015.06.020

    • Peer Reviewed / Open Access
  • [Journal Article] Time-dependent singularities for a semilinear parabolic equation with absorption2016

    • Author(s)
      J. Takahashi and E. Yanagida
    • Journal Title

      Commun. Contemp. Math.

      Volume: 18 Pages: 1550077-1~27

    • DOI

      10.1142/S0219199715500777

    • Peer Reviewed
  • [Journal Article] Singular solutions of the scalar field equation with a critical exponent2016

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

      Springer Proceedings in Mathematics & Statistics

      Volume: 176 Pages: 257~276

    • DOI

      10.1007/978-3-319-41538-3_16

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On the effect of equivalent constraints on a maximizing problem associated with the Sobolev type embeddings in RN.2016

    • Author(s)
      Michinori Ishiwata and Hidemitsu Wadade
    • Journal Title

      Math. Ann.

      Volume: 364 Pages: 1043~1068

    • DOI

      10.1007/s00208-015-1243-7

    • Peer Reviewed / Open Access
  • [Journal Article] Sharp remainder of a critical Hardy inequality2016

    • Author(s)
      Norisuke Ioku, Michinori Ishiwata and Tohru Ozawa
    • Journal Title

      Arch. Math. (Basel)

      Volume: 106 Pages: 65~71

    • DOI

      10.1007/s00013-015-0841-7

    • Peer Reviewed / Open Access
  • [Journal Article] Stability Analysis of Delaunay Surfaces as Steady States for the Surface Diffusion Equation2016

    • Author(s)
      Yoshihito Kohsaka
    • Journal Title

      Springer Proceedings in Mathematics & Statistics

      Volume: 176 Pages: 121~148

    • DOI

      10.1007/978-3-319-41538-3_8

    • Peer Reviewed / Open Access
  • [Presentation] Extinction of solutions of the logarithmic diffusion equation2017

    • Author(s)
      柳田英二
    • Organizer
      第34回九州における偏微分方程式研究集会
    • Invited
  • [Presentation] Long-time behavior of solutions of the Fisher-KPP equation for slowly decaying initial data2017

    • Author(s)
      Eiji Yanagida
    • Organizer
      Mathematical Analysis on Nonlinear PDEs
    • Int'l Joint Research / Invited
  • [Presentation] Separation structure of solutions for elliptic equations with exponential nonlinearity2017

    • Author(s)
      Yuki Naito
    • Organizer
      2017 International Workshop on Nonlinear PDE and Applications
    • Int'l Joint Research / Invited
  • [Presentation] Incomplete blow-up of solutions for semilinear heat equations with supercritical nonlinearity2017

    • Author(s)
      内藤雄基
    • Organizer
      研究集会「第34回九州における偏微分方程式研究集会」
    • Invited
  • [Presentation] Asymptotic self-similarity of solutions to semilinear heat equations2017

    • Author(s)
      内藤雄基
    • Organizer
      研究集会「Mathematical Analysis on Nonlinear PDEs」
    • Int'l Joint Research / Invited
  • [Presentation] Positive Schrodinger operators with the inverse square potential and related topics2017

    • Author(s)
      Yoshitsugu Kabeya
    • Organizer
      南大阪応用数学セミナー
    • Int'l Joint Research
  • [Presentation] Positive Schrodinger operators with the inverse square potential and related topics2017

    • Author(s)
      Yoshitsugu Kabeya
    • Organizer
      Mathematical Analysis on Nonlinear PDEs
    • Int'l Joint Research / Invited
  • [Presentation] On the bifurcation diagrams for steady states of the surface diffusion equation2017

    • Author(s)
      高坂良史
    • Organizer
      International Conference on PDEs, Geometric Analysis and Functional Inequalities
    • Int'l Joint Research / Invited
  • [Presentation] 表面拡散方程式の定常問題としての Delaunay 曲面の安定性解析2017

    • Author(s)
      高坂良史
    • Organizer
      大阪駅前セミナー
    • Invited
  • [Presentation] Extinction profile of solutions of the logarithmic diffusion equation on R2016

    • Author(s)
      柳田英二
    • Organizer
      RIMS 研究集会『偏微分方程式の解の形状解析』
    • Invited
  • [Presentation] Boundary singularity in a semilinear parabolic equation with the Neumann boundary conditions2016

    • Author(s)
      Eiji Yanagida
    • Organizer
      7th Euro-Japanese Workshop on Blow-up
    • Int'l Joint Research
  • [Presentation] Removable and non-removable singularities in some parabolic equations2016

    • Author(s)
      Eiji Yanagida
    • Organizer
      The 7th Pacific RIM Conference on Mathematics 2016
    • Int'l Joint Research / Invited
  • [Presentation] Dynamics of solutions the Fisher -KPP equation for slowly decaying initial data2016

    • Author(s)
      Eiji Yanagida
    • Organizer
      International Conference on Reaction-Diffusion Equations and Their Applications to the Life, Social and Physical Sciences
    • Int'l Joint Research / Invited
  • [Presentation] Global existence and boundedness of solutions to chemotaxis systems with general sensitivity2016

    • Author(s)
      Takasi Senba
    • Organizer
      7th Euro-Japanese Workshop on Blow-up
    • Int'l Joint Research / Invited
  • [Presentation] Singular extremal solutions for supercritical elliptic equations in a ball2016

    • Author(s)
      内藤雄基
    • Organizer
      常微分方程式の定性的理論ワークショップ
    • Invited
  • [Presentation] A priori bounds for superlinear ellitptic equations with semidefinite nonlinearity2016

    • Author(s)
      鈴木貴、豊田洋平、内藤雄基
    • Organizer
      日本数学会秋季大会
  • [Presentation] Peaking solutions to semilinear heat equations with supercritical nonlinearities2016

    • Author(s)
      Yuki Naito
    • Organizer
      7th Euro-Japanese Workshop on Blow-up
    • Int'l Joint Research / Invited
  • [Presentation] Classification of bifurcation diagrams for supercritical elliptic equations in a ball2016

    • Author(s)
      内藤雄基
    • Organizer
      第141回神楽坂解析セミナー
    • Invited
  • [Presentation] Difference equation and the related Schrodinger operator2016

    • Author(s)
      Yoshitsugu Kabeya
    • Organizer
      The 22nd International Conference on Difference Equations and Applications
    • Int'l Joint Research
  • [Presentation] On the compactness of the embedding $H_0^1(\OMega)\hookrightarrow L^{q(x)}(\Omega)$2016

    • Author(s)
      Michinori Ishiwata
    • Organizer
      International Workshop on Nonlinear PDEs 2016 in Osaka
    • Int'l Joint Research / Invited
  • [Presentation] On the compactness of the Sobolev type embedding with variable exponent2016

    • Author(s)
      Michinori Ishiwata
    • Organizer
      熊本大学応用解析セミナー
    • Invited
  • [Presentation] 非コンパクトな軌道を持つ力学系を巡って2016

    • Author(s)
      Michinori Ishiwata
    • Organizer
      愛媛大学数学教室談話会
    • Invited
  • [Presentation] ゼータ正規化された経路積分と熱方程式の基本解について2016

    • Author(s)
      Michinori Ishiwata
    • Organizer
      グラフゼータと量子ウォークの諸相(室蘭工業大学)
    • Invited
  • [Presentation] A remark on the compactness of the Sobolev type embedding with variable exponent2016

    • Author(s)
      Michinori Ishiwata
    • Organizer
      Pacific Rim Conference
    • Invited
  • [Presentation] On the compactness of the Sobolev embedding with a variable exponent2016

    • Author(s)
      Michinori Ishiwata
    • Organizer
      信州大学偏微分方程式研究集会
    • Invited
  • [Presentation] Bifurcation analysis for steady states of surface diffusion equation2016

    • Author(s)
      高坂良史
    • Organizer
      Elucidation of configurational structure in micro behavior and collective pattern formation
    • Invited
  • [Presentation] 表面拡散方程式の定常曲面の安定性について2016

    • Author(s)
      高坂良史
    • Organizer
      東北大学応用数学セミナー
    • Invited
  • [Presentation] Stability analysis of steady states for surface diffusion equation2016

    • Author(s)
      高坂良史
    • Organizer
      Workshop on nonlinear partial differential equations and related topics
    • Invited
  • [Funded Workshop] International Workshop on Nonlinear PDEs 2016 in Osaka2016

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Published: 2018-12-17  

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