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Exact number of solutions and bifurcation phenomena to two-point boundary value problems

Research Project

Project/Area Number 19K03595
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 12020:Mathematical analysis-related
Research InstitutionTohoku University (2020-2023)
Okayama University of Science (2019)

Principal Investigator

Tanaka Satoshi  東北大学, 理学研究科, 教授 (90331959)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords境界値問題 / 楕円型方程式 / 球対称解 / 一意性 / 多重存在性 / 準線形 / 解曲線の長さ / 漸近挙動 / 正値解 / 精度保証付き数値計算 / 2点境界値問題 / 解の個数 / 分岐現象 / モース指数
Outline of Research at the Start

本研究では, 非線形常微分方程式の2点境界値問題を考える. 丁度 k-1 個の零点をもつ解を k-nodal 解という. 本研究の目的は, この問題の k-nodal 解の個数を調査することである. 国内の学会・研究集会に参加し, 最新の情報を入手し, 本研究の成果発表を行う. さらに, 国際研究集会に参加し, 研究成果発表と情報収集を行う. この分野での指導的な立場である海外の研究者や革新的な結果を導いている若手研究者を日本に招へいして研究打ち合わせを行い, 本研究を大きく進展させる. 以上の得られた成果を論文にまとめ, 学術雑誌に投稿する.

Outline of Final Research Achievements

New uniqueness and multiple existence results were derived for radially symmetric solutions of elliptic partial differential equations. The asymptotic behavior of radially symmetric solutions of quasilinear elliptic equations was investigated. The asymptotic behavior of solutions of equations with p-Laplace operators and the asymptotic behavior and monotonicity of eigenvalues were also studied. New results were also obtained on the existence of solutions to elliptic equations with general differential operators. Furthermore, the stability of solutions asymptotic to the origin of a two-dimensional nonautonomous differential system was evaluated in terms of the length and fractal dimension of the solution trajectory.

Academic Significance and Societal Importance of the Research Achievements

円環領域における楕円型偏微分方程式の正値解の一意性について、これまで未解決であった部分について一定の答えを与えることができた。ある準線形の自励型常微分方程式系の平衡解の線形化に対応する新しい理論を構築した。これは楕円型偏微分方程式の解析などの様々な応用が見込まれるものである。一般的な微分作用素をもつ楕円型方程式の研究は、現在、活発に研究が行われており、本研究により、様々な微分作用素を統一的に扱う方法が提示され、今後の多くの研究で、その応用が期待される。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (43 results)

All 2024 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (10 results) Journal Article (11 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 11 results,  Open Access: 4 results) Presentation (20 results) (of which Int'l Joint Research: 9 results,  Invited: 15 results) Funded Workshop (2 results)

  • [Int'l Joint Research] Universidad de Chile/Pontificia Universidad Catolica de Chile(チリ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] University of Ulsan(韓国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Universidad de Chile(チリ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] University of Ulsan(韓国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Pontificia Universidad Catolica de Chile(チリ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of Ulsan(韓国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Pontificia Universidad Catolica de Chile/Center for Mathematical Modeling(チリ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] University of Ulsan(韓国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Pontificia Universidad Catolica de Chile/Center for Mathematical Modeling(チリ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of Ulsan(韓国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Periodic solutions for nonlinear systems of Ode's with generalized variable exponents operators2024

    • Author(s)
      Marta Garcia-Huidobro, Raul Manasevich, Jean Mawhin, Satoshi Tanaka
    • Journal Title

      Journal of Differential Equations

      Volume: 388 Pages: 34-58

    • DOI

      10.1016/j.jde.2023.12.040

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] An eigenvalue problem for a variable exponent problem, via topological degree2024

    • Author(s)
      Raul Manasevich, Satoshi Tanaka
    • Journal Title

      Discrete and Continuous Dynamical Systems

      Volume: 44 Issue: 4 Pages: 970-982

    • DOI

      10.3934/dcds.2023134

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Asymptoric behavior and monotonicity of radial eigenvalues for the p-Laplacian2024

    • Author(s)
      Ryuji Kajikiya, Mieko Tanaka, Satoshi Tanaka
    • Journal Title

      Journal of Differential Equations

      Volume: 387 Pages: 496-531

    • DOI

      10.1016/j.jde.2024.01.027

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Influence of nonlinearity to box-counting dimensions of spiral orbits for two-dimensional differential systems2024

    • Author(s)
      Masakazu Onitsuka, Satoshi Tanaka
    • Journal Title

      Bulletin des Sciences Mathematiques

      Volume: 192 Pages: 103417-103417

    • DOI

      10.1016/j.bulsci.2024.103417

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Multiple existence of positive even solutions for a two point boundary value problem on some very narrow possible parameter set2022

    • Author(s)
      Naoki Shioji, Satoshi Tanaka, Kohtaro Watanabe
    • Journal Title

      J. Mathematical Analysis and Applications

      Volume: 513 Issue: 1 Pages: 126182-126182

    • DOI

      10.1016/j.jmaa.2022.126182

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] On the uniqueness of solutions of a semilinear equation in an annulus2021

    • Author(s)
      Carmen Cortazar, Marta Garcia-Huidobro, Pilar Herreros, Satoshi Tanaka
    • Journal Title

      Communications on Pure and Applied Analysis

      Volume: 20 Issue: 4 Pages: 1479-1479

    • DOI

      10.3934/cpaa.2021029

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A note on the asymptotic behavior of radial solutions to quasilinear elliptic equations with a Hardy potential2021

    • Author(s)
      Kenta Itakura, Satoshi Tanaka
    • Journal Title

      Proceedings of the American Mathematical Society, Series B

      Volume: 8 Issue: 25 Pages: 302-310

    • DOI

      10.1090/bproc/100

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Perturbations of planar quasilinear differential systems2021

    • Author(s)
      Itakura Kenta、Onitsuka Masakazu、Tanaka Satoshi
    • Journal Title

      Journal of Differential Equations

      Volume: 271 Pages: 216-253

    • DOI

      10.1016/j.jde.2020.08.024

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Uniqueness of positive radial solutions of superlinear elliptic equations in annuli2021

    • Author(s)
      Shioji Naoki、Tanaka Satoshi、Watanabe Kohtaro
    • Journal Title

      Journal of Differential Equations

      Volume: 284 Pages: 522-545

    • DOI

      10.1016/j.jde.2021.02.047

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Rectifiability of orbits for two-dimensional nonautonomous differential systems2021

    • Author(s)
      Onitsuka Masakazu、Tanaka Satoshi
    • Journal Title

      Electronic Journal of Qualitative Theory of Differential Equations

      Volume: 2021 Issue: 18 Pages: 1-23

    • DOI

      10.14232/ejqtde.2021.1.18

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Positive Solutions for Systems of Quasilinear Equations with Non-homogeneous Operators and Weights2020

    • Author(s)
      Garcia-Huidobro Marta、Manasevich Raul、Tanaka Satoshi
    • Journal Title

      Advanced Nonlinear Studies

      Volume: 20 Issue: 2 Pages: 293-310

    • DOI

      10.1515/ans-2020-2082

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Uniqueness and nonuniqueness of positive radial solutions to the Brezis-Nirenberg problem in an annulus2024

    • Author(s)
      Satoshi Tanaka
    • Organizer
      第41回九州における偏微分方程式研究集会
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Uniqueness and multiplicity of positive solutions to thescalar-field equation on large annuli in the three-dimensional unit sphere2023

    • Author(s)
      Satoshi Tanaka
    • Organizer
      The 13th AIMS Conference on Dynamical Systems, Differential Equations and Applications, SS28
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On the multiplicity of positive even solutions to the one-dimensional Henon type equation on some very narrow possible parameter set2023

    • Author(s)
      Satoshi Tanaka
    • Organizer
      The 13th AIMS Conference on Dynamical Systems, Differential Equations and Applications, SS28
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] p-Laplacian の球対称固有値の漸近挙動と単調性2023

    • Author(s)
      田中敏、梶木屋龍治、田中視英子
    • Organizer
      北見工大における微分方程式セミナー(通算第45回)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Uniqueness and multiplicity of positive solutions to the scalar-field equation on large annuli in the three-dimensional unit sphere2023

    • Author(s)
      Satoshi Tanaka
    • Organizer
      13th Americas Conference on Diff. Equations and Nonlinear Analysis and ICMC Summer Meeting on Differential Equations - 2023 Chapter
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 三次元単位球面上の円環領域における scalar-field 方程式の正値解の多重存 在2023

    • Author(s)
      田中敏
    • Organizer
      微分方程式における解の漸近挙動の解析とその周 辺
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 三次元単位球面内の円環領域上の scalar-field 方程式の正値対称解2022

    • Author(s)
      田中敏
    • Organizer
      広島数理解析セミナー (第 260 回)
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Existence and multiplicity of positive solutions to the scalar-field equation on large annuli in the 3-sphere2022

    • Author(s)
      渡辺宏太郎, 田中敏, 塩路直樹
    • Organizer
      日本数学会 2022 年 度秋季総合分科会
    • Related Report
      2022 Research-status Report
  • [Presentation] Existence and multiplicity of positive solutions to the scalar-field equation on large annuli in the three-dimensional sphere2022

    • Author(s)
      Satoshi Tanaka
    • Organizer
      CMM PDE Seminar
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On the uniqueness of positive radial solutions to superlinear elliptic equations in annuli2022

    • Author(s)
      Satoshi Tanaka
    • Organizer
      第23回北東数学解析研究会
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Multiplicity of positive even solutions to the one-dimensional Henon type equation on some very narrow possible parameter set2021

    • Author(s)
      Satoshi Tanaka
    • Organizer
      Differential Equations Day on ZOOM
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Multiple existence of positive even function solutions for a two point boundary value problem on some very narrow possible2021

    • Author(s)
      渡辺宏太郎, 田中敏, 塩路直樹
    • Organizer
      日本数学会 2021 年度秋季総合分科会
    • Related Report
      2021 Research-status Report
  • [Presentation] 1次元 Henon 型方程式の正値対称解の多重存在2021

    • Author(s)
      田中敏
    • Organizer
      第5回 精度保証付き数値計算の実問題への応用研究集会 (NVR 2021)
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Rectifiability and attractivity for two-dimensional nonautonomous differential systems2021

    • Author(s)
      鬼塚政一、田中 敏
    • Organizer
      日本数学会 2021年度年会
    • Related Report
      2020 Research-status Report
  • [Presentation] On a perturbation theory for the planar quasilinear differential system and its application2021

    • Author(s)
      田中 敏、鬼塚政一
    • Organizer
      日本数学会 2021年度年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Perturbation of planar quasilinear differential systems and its application2020

    • Author(s)
      田中 敏
    • Organizer
      東北大学 応用数理解析セミナー
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 1次元 Henon 方程式の正値対称解のモース指数と対称性破壊分岐について2020

    • Author(s)
      田中 敏
    • Organizer
      第4回 精度保証付き数値計算の実問題への応用研究集会 (NVR 2020)
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 1次元 Henon 方程式の正値対称解のモース指数と対称性破壊分岐2019

    • Author(s)
      田中 敏
    • Organizer
      東北大学 応用数理解析セミナー
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Perturbations of half-linear differential systems and its application to quasilinear elliptic equations2019

    • Author(s)
      Satoshi Tanaka
    • Organizer
      DEA 2019: Dynamics, Equations and Applications
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Perturbations of quasilinear differential systems2019

    • Author(s)
      Satoshi Tanaka
    • Organizer
      2019 International Workshop on Nonlinear PDEs and Its Applications
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Funded Workshop] International Workshop on Nonlinear Elliptic Equations and Its Applications2022

    • Related Report
      2021 Research-status Report
  • [Funded Workshop] Online seminar on differential equations2021

    • Related Report
      2021 Research-status Report

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Published: 2019-04-18   Modified: 2025-01-30  

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