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2016 Fiscal Year Annual Research Report

Geometry of solutions of partial differential equations and the inverse problems accompanied by it

Research Project

Project/Area Number 26287020
Research InstitutionTohoku University

Principal Investigator

坂口 茂  東北大学, 情報科学研究科, 教授 (50215620)

Co-Investigator(Kenkyū-buntansha) 倉田 和浩  首都大学東京, 理工学研究科, 教授 (10186489)
川上 竜樹  大阪府立大学, 工学(系)研究科(研究院), 准教授 (20546147)
池畠 優  広島大学, 工学(系)研究科(研究院), 教授 (90202910)
宮本 安人  東京大学, 数理(科)学研究科(研究院), 准教授 (90374743)
Project Period (FY) 2014-04-01 – 2018-03-31
Keywords熱拡散方程式 / 複合媒質 / 不変等温面 / 非線形シュレディンガー方程式 / アレンカーン型方程式 / 漸近展開理論 / 囲い込み法 / 優臨界楕円型方程式
Outline of Annual Research Achievements

昨年度に引き続き, 主な研究目的は広く偏微分方程式の初期値問題や境界値問題において, 解の幾何学的挙動と領域の幾何学的情報との関係を明らかにすることであった。

代表者の主な成果を述べる。異なる熱伝導率をもつ2種以上の複合媒質上の熱拡散を考えて, 2相熱伝導体の中で同心球の不変等温面による特徴付けを与えた。単一媒質の熱伝導体の場合は球の不変等温面による特徴付けを以前示していたが, 2種以上の複合媒質の場合は不連続な熱伝導率を記述する楕円型作用素を扱わねばならず本質的な技術的困難さがありこの問題は未解明であった。

以下分担者の成果を述べる。倉田は非コンパクトな距離グラフ上での非線形シュレディンガー方程式のエネルギー基底状態の存在問題やアレンカーン型方程式に対するヘテロクリニック解の存在・非存在問題を変分法的手法により研究し, グラフの形状および空間非斉次性との関係を調べた。川上は様々な非線形発展方程式の解の漸近展開理論について, 成果を5つの論文で発表した。池畠は時間領域における囲い込み法の, きわめて汎用性が高い, より単純なバージョンを見出し, 成果を4つの論文で発表した。宮本は全領域上のべき型非線形項を持つ優臨界準線形楕円型方程式の2つの球対称解の交点数を調べ, ディリクレ問題の分岐構造を明らかにし, べきとは限らない一般の増大度を持つ優臨界半線形楕円型方程式に対しては, 一般化相似変換による極限方程式を導出し, それを用いて, 分岐構造を明らかにした。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

研究課題に対して相応の進展があった。特に, 異なる熱伝導率をもつ2種以上の複合媒質上の熱拡散方程式の解の不変等温面の研究の端緒が開かれ, 解の幾何学的挙動と領域の幾何学的情報との関係に対する新たな展開が期待される。

Strategy for Future Research Activity

今後もさらに, 普段の国内の研究分担者と連携研究者との研究連絡及び国内外の研究協力者との討論・情報交換を様々な機会を通して活発に行い, 偏微分方程式の解の幾何学的挙動と領域の幾何学的情報との関係の解明に努める。

Causes of Carryover

次年度使用額は, 今年度の研究を効率的に推進したことに伴い発生した未使用額である。

Expenditure Plan for Carryover Budget

平成29年度請求額と合わせ, 平成29年度の研究遂行に使用する予定である。

  • Research Products

    (47 results)

All 2017 2016 Other

All Int'l Joint Research (1 results) Journal Article (13 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 13 results,  Open Access: 1 results,  Acknowledgement Compliant: 2 results) Presentation (29 results) (of which Int'l Joint Research: 18 results,  Invited: 21 results) Book (1 results) Remarks (1 results) Funded Workshop (2 results)

  • [Int'l Joint Research] フィレンツェ大学(イタリア)

    • Country Name
      ITALY
    • Counterpart Institution
      フィレンツェ大学
  • [Journal Article] On a Variational Problem Arising from the Three-component FitzHugh-Nagumo Type Reaction-Diffusion Systems2017

    • Author(s)
      Takashi Kajiwara and Kazuhiro Kurata
    • Journal Title

      Tokyo J. Math.

      Volume: 40 Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Asymptotic behavior and decay estimates of the solutions for a nonlinear parabolic equation with exponential nonlinearity2017

    • Author(s)
      Giulia Furioli, Tatsuki Kawakami, Bernhard Ruf and Elide Terraneo
    • Journal Title

      J. Differential Equations

      Volume: 262 Pages: 145--180

    • DOI

      10.1016/j.jde.2016.09.024

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Existence of mild solutions for a Hamilton-Jacobi equation with critical fractional viscosity in the Besov spaces2017

    • Author(s)
      Tsukasa Iwabuchi and Tatsuki Kawakami
    • Journal Title

      J. Math. Pures Appl.

      Volume: 107 Pages: 464--489

    • DOI

      10.1016/j.matpur.2016.07.007

    • Peer Reviewed
  • [Journal Article] An exterior nonlinear elliptic problem with a dynamical boundary condition2017

    • Author(s)
      Marek Fila, Kazuhiro Ishige and Tatsuki Kawakami
    • Journal Title

      Rev. Mat. Complut.

      Volume: - Pages: 印刷中

    • DOI

      10.1007/s13163-017-0225-6

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Asymptotic expansions of solutions of fractional diffusion equations2017

    • Author(s)
      Kazuhiro Ishige, Tatsuki Kawakami and Hironori Michihisa
    • Journal Title

      SIAM J. Math. Anal.

      Volume: - Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] On finding an obstacle with the Leontovich boundary condition via the time domain enclosure method2017

    • Author(s)
      Masaru Ikehata
    • Journal Title

      Inverse Problems and Imaging

      Volume: 11 Pages: 99--123

    • DOI

      10.3934/ipi.2017006

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] A remark on finding the coefficient of the dissipative boundary condition via the enclosure method in the time domain2017

    • Author(s)
      Masaru Ikehata
    • Journal Title

      Math. Mech. Appl. Sci.

      Volume: 40 Pages: 915--927

    • DOI

      10.1002/mma.4021

    • Peer Reviewed
  • [Journal Article] The enclosure method for inverse obstacle scattering over a finite time interval: IV. Extraction from a single point on the graph of the response operator2017

    • Author(s)
      Masaru Ikehata
    • Journal Title

      J. Inverse and Ill-Posed Problems

      Volume: - Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Asymptotic behaviour of the solutions for the Laplace equation with a large spectral parameter and the inhomogeneous Robin type conditions2017

    • Author(s)
      Masaru Ikehata and Mishio Kawashita
    • Journal Title

      Osaka J. Math.

      Volume: - Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Generalized Joseph-Lundgren exponent and intersection properties for supercritical quasilinear elliptic equations2017

    • Author(s)
      Yasuhito Miyamoto and Kazune Takahashi
    • Journal Title

      Arch. Math.

      Volume: 108 Pages: 71--83

    • DOI

      10.1007/s00013-016-0969-0

    • Peer Reviewed
  • [Journal Article] Infinitely many nonradial singular solutions of $\Delta u+e^u=0$ in $\mathbb{R}\backslash \{0\}$, 4<=N<=102017

    • Author(s)
      Yasuhito Miyamoto
    • Journal Title

      Proceedings of the Royal Society of Edinburgh, Section: A Mathematics

      Volume: - Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Two-phase heat conductors with a stationary isothermic surface2016

    • Author(s)
      Shigeru Sakaguchi
    • Journal Title

      Rend. Istit. Mat. Univ. Trieste

      Volume: 48 Pages: 167--187

    • DOI

      10.13137/2464-8728/13155

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Higher order asymptotic expansions to the solutions for a nonlinear damped wave equation2016

    • Author(s)
      Tatsuki Kawakami and Hiroshi Takeda
    • Journal Title

      Nonlinear Differ. Equ. Appl.

      Volume: 23 Pages: -

    • DOI

      10.1007/s00030-016-0408-8

    • Peer Reviewed
  • [Presentation] A limit equation and bifurcation diagrams of semilinear elliptic equations with general supercritical growth2017

    • Author(s)
      Yasuhito Miyamoto
    • Organizer
      2017 International Workshop on Nonlinear PDE and Applications
    • Place of Presentation
      Daejeon, 大韓民国
    • Year and Date
      2017-03-30
    • Int'l Joint Research / Invited
  • [Presentation] 一般化されたジョセフルンドグレン指数と交点数2017

    • Author(s)
      宮本 安人, 高橋 和音
    • Organizer
      日本数学会年会
    • Place of Presentation
      首都大学東京(八王子市)
    • Year and Date
      2017-03-25
  • [Presentation] 交差拡散効果をもつあるprey-predator反応拡散系の非定数定常解について2017

    • Author(s)
      倉田 和浩
    • Organizer
      研究集会「非線形現象の数値シミュレーションと解析2017」
    • Place of Presentation
      北海道大学(札幌市)
    • Year and Date
      2017-03-07
    • Invited
  • [Presentation] An exterior nonlinear elliptic problem with a dynamical boundary condition2017

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      2017 NCTS Workshop on Applied Mathematics at Tainan
    • Place of Presentation
      Tainan, Taiwan
    • Year and Date
      2017-03-06
    • Int'l Joint Research / Invited
  • [Presentation] 非有界network上のAllen-Cahn方程式のヘテロクリニック解について2017

    • Author(s)
      倉田 和浩
    • Organizer
      首都大学東京第11回非線形偏微分方程式と変分問題
    • Place of Presentation
      首都大学東京(八王子市)
    • Year and Date
      2017-02-12
  • [Presentation] The enclosure method for inverse obstacle scattering over a finite time interval: IV. Extraction from a single point on the graph of the response operator2017

    • Author(s)
      Masaru Ikehata
    • Organizer
      RIMS Workshop Inverse problems for partial differential equations and related topics
    • Place of Presentation
      京都大学数理解析研究所(京都市)
    • Year and Date
      2017-01-26
    • Int'l Joint Research / Invited
  • [Presentation] Intersection number and applications for semilinear elliptic equations with general supercritical growth2017

    • Author(s)
      宮本 安人
    • Organizer
      Tokyo-Berkeley Mathematics Workshop PDEs and Mathematical Physics
    • Place of Presentation
      東京大学(東京都・目黒区)
    • Year and Date
      2017-01-13
    • Int'l Joint Research / Invited
  • [Presentation] 一般化ジョセフ・ルンドグレン指数と交点数2016

    • Author(s)
      宮本 安人, 高橋 和音
    • Organizer
      第42回発展方程式研究会
    • Place of Presentation
      日本女子大学(東京都・文京区)
    • Year and Date
      2016-12-25
  • [Presentation] 藤嶋スケール変換によるソボレフ優臨界楕円型・放物型問題の極限方程式とその応用2016

    • Author(s)
      宮本 安人
    • Organizer
      第 14 回浜松偏微分方程式研究集会
    • Place of Presentation
      静岡大学(浜松市)
    • Year and Date
      2016-12-22
    • Invited
  • [Presentation] Asymptotic behavior and decay estimates of the solutions for a nonlinear parabolic equation with exponential nonlinearity2016

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      International Workshop on Nonlinear PDEs 2016 in Osaka
    • Place of Presentation
      大阪府立大学(堺市)
    • Year and Date
      2016-12-07 – 2016-12-09
    • Int'l Joint Research / Invited
  • [Presentation] Intersection number and applications for semilinear elliptic equations with general supercritical growth2016

    • Author(s)
      宮本 安人
    • Organizer
      愛媛大学解析セミナー
    • Place of Presentation
      愛媛大学(松山市)
    • Year and Date
      2016-12-02
  • [Presentation] 空間2次元の異種成分間の斥力相互作用をもつ 2成分Bose-Einstein凝縮体に関する変分問題について2016

    • Author(s)
      倉田 和浩
    • Organizer
      東北大学大学院理学研究科数学専攻談話会
    • Place of Presentation
      東北大学(仙台市)
    • Year and Date
      2016-11-28
    • Invited
  • [Presentation] Intersection number and applications for semilinear elliptic equations with general supercritical growth2016

    • Author(s)
      Yasuhito Miyamoto
    • Organizer
      RIMS 研究集会「常微分方程式の定性的理論とその周辺」
    • Place of Presentation
      京都大学数理解析研究所(京都市)
    • Year and Date
      2016-11-17
    • Int'l Joint Research / Invited
  • [Presentation] The probe and enclosure methods for invere obstacle problems governed by partial differential equations2016

    • Author(s)
      Masaru Ikehata
    • Organizer
      ICUB Talks: Exact Sciences Section
    • Place of Presentation
      Bucharest, Romania
    • Year and Date
      2016-11-10
    • Int'l Joint Research / Invited
  • [Presentation] An exterior nonlinear elliptic problem with a dynamical boundary condition2016

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      RIMS Workshop Analysis on Shapes of Solutions to Partial Differential Equations
    • Place of Presentation
      京都大学数理解析研究所(京都市)
    • Year and Date
      2016-11-09 – 2016-11-11
    • Int'l Joint Research / Invited
  • [Presentation] Two-phase conductors and overdetermined problems with transmission conditions2016

    • Author(s)
      Shigeru Sakaguchi
    • Organizer
      Geometry of solutions of PDE's and its related inverse problems
    • Place of Presentation
      東北大学(仙台市)
    • Year and Date
      2016-10-05 – 2016-10-07
    • Int'l Joint Research / Invited
  • [Presentation] An exterior nonlinear elliptic problem with a dynamical boundary condition2016

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      Geometry of solutions of PDE's and its related inverse problems
    • Place of Presentation
      東北大学(仙台市)
    • Year and Date
      2016-10-05 – 2016-10-07
    • Int'l Joint Research / Invited
  • [Presentation] The enclosure method for the Maxwell system in time domain2016

    • Author(s)
      Masaru Ikehata
    • Organizer
      Geometry of solutions of PDE's and its related inverse problems
    • Place of Presentation
      東北大学(仙台市)
    • Year and Date
      2016-10-05 – 2016-10-07
    • Int'l Joint Research / Invited
  • [Presentation] On finding an obstacle with the Leontovich boundary condition via the time domain enclosure method2016

    • Author(s)
      池畠 優
    • Organizer
      日本数学会秋季総合分科会
    • Place of Presentation
      関西大学(吹田市)
    • Year and Date
      2016-09-17
  • [Presentation] 一つの不変等温面を伴う二相導体2016

    • Author(s)
      坂口 茂
    • Organizer
      日本数学会秋季総合分科会
    • Place of Presentation
      関西大学(吹田市)
    • Year and Date
      2016-09-16
  • [Presentation] 平均曲率方程式の半連続解に対する強比較原理2016

    • Author(s)
      大沼 正樹, 坂口 茂
    • Organizer
      日本数学会秋季総合分科会
    • Place of Presentation
      関西大学(吹田市)
    • Year and Date
      2016-09-15
  • [Presentation] Existence and non-existence of non-constant stationary patterns for certain prey-predator type reaction-diffusion systems with a cross-diffusion effect2016

    • Author(s)
      Kazuhiro Kurata
    • Organizer
      研究集会「ミクロな振る舞いと集団的パターン形成に係る階層的構造の解明」
    • Place of Presentation
      京都大学数理解析研究所(京都市)
    • Year and Date
      2016-09-14
    • Int'l Joint Research / Invited
  • [Presentation] A semilinear elliptic equation with a dynamical boundary condition2016

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      7th Euro-Japanese workshop on Blow-up
    • Place of Presentation
      Bedlewo, Poland
    • Year and Date
      2016-09-05 – 2016-09-09
    • Int'l Joint Research / Invited
  • [Presentation] 一般化ジョセフ・ルンドグレン指数と交点数2016

    • Author(s)
      宮本 安人
    • Organizer
      横浜国立大微分方程式セミナー
    • Place of Presentation
      横浜国立大学(横浜市)
    • Year and Date
      2016-08-25
  • [Presentation] Generalized Joseph-Lundgren exponent and intersection properties for supercritical quasilinear elliptic equations2016

    • Author(s)
      Yasuhito Miyamoto
    • Organizer
      Ito Workshop on Partial Differential Equations
    • Place of Presentation
      九州大学(福岡市)
    • Year and Date
      2016-08-22
    • Int'l Joint Research / Invited
  • [Presentation] Existence and non-existence of non-constant stationary patterns for certain prey-predator type reaction-diffusion systems with a cross-diffusion effect2016

    • Author(s)
      Kazuhiro Kurata
    • Organizer
      The 11th AIMS Conference on Dynamical Systems, Differential Equations and Applications
    • Place of Presentation
      Orland, USA
    • Year and Date
      2016-07-02
    • Int'l Joint Research / Invited
  • [Presentation] Two-phase heat conductors with a stationary isothermic surface2016

    • Author(s)
      Shigeru Sakaguchi
    • Organizer
      RIMS Workshop Regularity, singularity and long time behavior for partial differential equations with conservation law
    • Place of Presentation
      京都大学数理解析研究所(京都市)
    • Year and Date
      2016-06-06 – 2016-06-08
    • Int'l Joint Research / Invited
  • [Presentation] Minimal solutions of a semilinear elliptic equation with a dynamical boundary condition2016

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      XXXVI Convegno di Analisi Armonica
    • Place of Presentation
      Gargnano, Italy
    • Year and Date
      2016-05-30 – 2016-06-03
    • Int'l Joint Research / Invited
  • [Presentation] Minimal solutions of a semilinear elliptic equation with a dynamical boundary condition2016

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      9th European conference on elliptic and parabolic problems
    • Place of Presentation
      Gaeta, Italy
    • Year and Date
      2016-05-23 – 2016-05-27
    • Int'l Joint Research / Invited
  • [Book] 偏微分方程式の解の幾何学2017

    • Author(s)
      坂口 茂
    • Total Pages
      112
    • Publisher
      サイエンス社
  • [Remarks] researchmap

    • URL

      http://researchmap.jp/sigersak2012415/

  • [Funded Workshop] RIMS Workshop Analysis on Shapes of Solutions to Partial Differential Equations2016

    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2016-11-09 – 2016-11-11
  • [Funded Workshop] Geometry of solutions of PDE's and its related inverse problems2016

    • Place of Presentation
      東北大学
    • Year and Date
      2016-10-05 – 2016-10-07

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Published: 2018-01-16  

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