• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2021 Fiscal Year Annual Research Report

Analysis of singular nonlinear structure in dissipative systems

Research Project

Project/Area Number 17H01095
Research InstitutionThe University of Tokyo

Principal Investigator

柳田 英二  東京大学, 大学院数理科学研究科, 特任教授 (80174548)

Co-Investigator(Kenkyū-buntansha) 石渡 通徳  大阪大学, 大学院基礎工学研究科, 教授 (30350458)
赤木 剛朗  東北大学, 理学研究科, 教授 (60360202)
田中 敏  東北大学, 理学研究科, 教授 (90331959)
若狭 徹  九州工業大学, 大学院工学研究院, 准教授 (20454069)
佐野 めぐみ  広島大学, 先進理工系科学研究科(工), 准教授 (70834935)
Project Period (FY) 2017-04-01 – 2022-03-31
Keywords偏微分方程式 / 特異拡散 / 散逸 / 変分問題 / 非線形 / 臨界指数 / 特異性 / ブラウン運動
Outline of Annual Research Achievements

2021年度は,非線形楕円型偏微分方程式の解の大域的構造の解明,放物型偏微分方程式の特異解の存在とその性質に関する研究の完成を目指した.
楕円型偏微分方程式に関しては,円環領域及び外部領域における楕円形境界値問題の正値球対称解の一意性,Hardy 項をもつ準線形楕円型方程式の球対称解の原点近傍及び無限遠方での漸近挙動について研究を進めた.また,空間1次元スカラーフィールド方程式の線形化固有値問題における固有値の漸近公式,ネットワーク上におけるChafee-Infante方程式の2次分岐問題に引き続き取り組んだ.さらには,調和移植を用いて、半空間上での古典的なHardy不等式を改良し、その極限形として臨界Hardy不等式を導出し,これまでの様々な変換の統一的解釈や一般化等を行った。
放物型偏微分方程式に関しては,特異点の位置が不規則に移動する場合に,そのヘルダー指数と解の特異点近傍での増大度の関係を調べ,臨界指数が現れることを示した.また,劣臨界指数をもつ半線型放物型方程式の解の漸近挙動を明らかにし,いわゆる藤田型方程式に対して摂動として線型項を加えた方程式について、任意の時間大域解が任意の時刻列に沿って非自明定常解をプロファイルとする有限個の重ね合わせに漸近することを示した.この他,破壊現象を記述するフェーズフィールドモデルの時間局所適切性の証明,不可逆性を伴う 1 次元Allen-Cahn方程式の進行波解 (の族) の構成とその指数安定性,非線形拡散方程式の時空均質化問題について研究の完成を図った.

Research Progress Status

令和3年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和3年度が最終年度であるため、記入しない。

  • Research Products

    (48 results)

All 2022 2021

All Journal Article (12 results) (of which Int'l Joint Research: 10 results,  Peer Reviewed: 12 results,  Open Access: 1 results) Presentation (34 results) (of which Int'l Joint Research: 14 results,  Invited: 29 results) Book (2 results)

  • [Journal Article] Traveling wave dynamics for Allen-Cahn equations with strong irreversibility2022

    • Author(s)
      Akagi Goro、Kuehn Christian、Nakamura Ken-Ichi
    • Journal Title

      Transactions of the American Mathematical Society

      Volume: 375 Pages: 3173-3238

    • DOI

      10.1090/tran/8583

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Space-time homogenization problems for porous medium equations with nonnegative initial data2022

    • Author(s)
      Goro Akagi and Tomoyuki Oka
    • Journal Title

      Advances in Mathematical Sciences and Applications, Gakkotosho

      Volume: 31 Pages: 1-19

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Critical Hardy inequality on the half-space via the harmonic transplantation2022

    • Author(s)
      Sano Megumi、Takahashi Futoshi
    • Journal Title

      Calculus of Variations and Partial Differential Equations

      Volume: 61 Pages: 1-33

    • DOI

      10.1007/s00526-022-02265-w

    • Peer Reviewed
  • [Journal Article] Maximizing the total population with logistic growth in a patchy environment2021

    • Author(s)
      Nagahara Kentaro、Lou Yuan、Yanagida Eiji
    • Journal Title

      Journal of Mathematical Biology

      Volume: 82 Pages: 0-0

    • DOI

      10.1007/s00285-021-01565-7

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On the evolution equation with a dynamic Hardy-type potential2021

    • Author(s)
      Chern Jann-Long、Hwang Gyeongha、Takahashi Jin、Yanagida Eiji
    • Journal Title

      J. Evol. Equ.

      Volume: 21 Pages: 2141-2165.

    • DOI

      10.21203/rs.3.rs-168871/v1

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Qualitative analysis of singular solutions for nonlinear elliptic equations with potentials2021

    • Author(s)
      Chern Jann-Long、Yanagida Eiji
    • Journal Title

      Mathematische Annalen

      Volume: 381 Pages: 853~874

    • DOI

      10.1007/s00208-020-02016-2

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Solutions with snaking singularities for the fast diffusion equation2021

    • Author(s)
      Fila Marek、King John、Takahashi Jin、Yanagida Eiji
    • Journal Title

      Transactions of the American Mathematical Society

      Volume: 374 Pages: 8775~8792

    • DOI

      10.1090/tran/8479

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Variational p-harmonious functions: existence and convergence to p-harmonic functions2021

    • Author(s)
      Chandra E. W.、Ishiwata M.、Magnanini R.、Wadade H.
    • Journal Title

      Nonlinear Differential Equations and Applications NoDEA

      Volume: 28 Pages: 1677-1716

    • DOI

      10.1007/s00030-021-00714-7

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Asymptotics for a parabolic equation with critical exponential nonlinearity2021

    • Author(s)
      Ishiwata Michinori、Ruf Bernhard、Sani Federica、Terraneo Elide
    • Journal Title

      Journal of Evolution Equations

      Volume: 21 Pages: 1677~1716

    • DOI

      10.1007/s00028-020-00649-z

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Local well-posedness for Fr?mond’s model of complete damage in elastic solids2021

    • Author(s)
      AKAGI GORO、SCHIMPERNA GIULIO
    • Journal Title

      European Journal of Applied Mathematics

      Volume: 33 Pages: 309~327

    • DOI

      10.1017/S0956792521000024

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On the uniqueness of solutions of a semilinear equation in an annulus2021

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

      Communications on Pure & Applied Analysis

      Volume: 20 Pages: 1479~1479

    • DOI

      10.3934/cpaa.2021029

    • 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)
      Itakura Kenta、Tanaka Satoshi
    • Journal Title

      Proceedings of the American Mathematical Society, Series B

      Volume: 8 Pages: 302~310

    • DOI

      10.1090/bproc/100

    • Peer Reviewed / Open Access
  • [Presentation] Traveling waves in the logarithmic diffusion equation with a bistable nonlinearity2022

    • Author(s)
      Eiji Yanagida
    • Organizer
      SIAM Conference on Analysis of Partial Differential Equations
    • Int'l Joint Research / Invited
  • [Presentation] Gradient flow theory for time-dependent energies and applications to nonlinear PDEs2022

    • Author(s)
      赤木 剛朗 , 田中 直樹
    • Organizer
      日本数学会 2022 年度年会実函数論分科会, 埼玉大学
  • [Presentation] Space-time periodic homogenization for the porous medium equation with nonnegative initial data2022

    • Author(s)
      赤木 剛朗 , 岡 大将
    • Organizer
      日本数学会 2022 年度年会函数方程式論分科会, 埼玉大学
  • [Presentation] On the uniqueness of positive radial solutions to superlinear elliptic equations in annuli2022

    • Author(s)
      Satoshi Tanaka
    • Organizer
      Differential Equations Day on ZOOM
    • Int'l Joint Research / Invited
  • [Presentation] fringing fieldを考慮したMEMSモデルの定常解と安定性2022

    • Author(s)
      若狭 徹
    • Organizer
      第11回室蘭非線形数理研究会, 室蘭工業大学
    • Invited
  • [Presentation] Improvements and generalizations of two Hardy type inequalities2022

    • Author(s)
      佐野 めぐみ
    • Organizer
      日韓共同研究集会 International Workshop on Nonlinear Elliptic Equations and Its Applications (Zoom)
    • Int'l Joint Research / Invited
  • [Presentation] 調和移植とその関数不等式への応用2022

    • Author(s)
      佐野 めぐみ
    • Organizer
      OCAMI談話会, 大阪公立大学
    • Invited
  • [Presentation] Improvements and generalizations of two Hardy type inequalities2022

    • Author(s)
      佐野 めぐみ
    • Organizer
      第23回北東数学解析研究会, 北海道大学
    • Int'l Joint Research / Invited
  • [Presentation] 調和移植とその関数不等式への応用2022

    • Author(s)
      佐野 めぐみ
    • Organizer
      日本数学会2022年度年会 函数解析学分科会特別講演, 埼玉大学 (Zoom)
    • Invited
  • [Presentation] On the heat equation with a dynamic singular potential2021

    • Author(s)
      Eiji Yanagida
    • Organizer
      PDEs and Probability Theory - beyond boundaries -
    • Int'l Joint Research / Invited
  • [Presentation] Solvability of the heat equation with a dynamic singular potential2021

    • Author(s)
      柳田 英二
    • Organizer
      応用解析研究会,早稲田大学
    • Invited
  • [Presentation] Solvability of the heat equation with a dynamic Hardy-type potential2021

    • Author(s)
      Eiji Yanagida
    • Organizer
      Webinar on Evolution Equations and Dynamical Systems, Universidade de Sao Paulo
    • Int'l Joint Research / Invited
  • [Presentation] On the heat equation with a dynamic singular potential2021

    • Author(s)
      Eiji Yanagida
    • Organizer
      NCTS Webinar on Nonlinear Evolutionary Dynamics
    • Int'l Joint Research / Invited
  • [Presentation] On the heat equation with a dynamic singular potential2021

    • Author(s)
      柳田 英二
    • Organizer
      京都大学数理研研究集会(公開型),常微分方程式の定性的理論とその応用
    • Invited
  • [Presentation] Pseudo-traveling wave decomposition of time-global solutions for semilinear parabolic equations2021

    • Author(s)
      Michinori Ishiwata
    • Organizer
      応用解析研究会, 早稲田大学西早稲田キャンパス
    • Invited
  • [Presentation] Local well-posedness for some phase-field model of complete damage2021

    • Author(s)
      Goro Akagi
    • Organizer
      ' - 21st Conference of Continuum Mechanics Focusing on Singularities (CoMFoS21) (Zoom)
    • Int'l Joint Research / Invited
  • [Presentation] Rates of convergence to asymptotic profiles for fast diffusion2021

    • Author(s)
      赤木 剛朗
    • Organizer
      NLPDEセミナー, 京都大学大学院理学研究科数学専攻 (Zoom)
    • Invited
  • [Presentation] Rates of convergence to asymptotic profiles for fast diffusion2021

    • Author(s)
      赤木 剛朗
    • Organizer
      第752回『応用解析』研究会, 早稲田大学
    • Invited
  • [Presentation] Energy method for quantitative analysis of rates of convergence to asymptotic profiles for fast diffusion2021

    • Author(s)
      Goro Akagi
    • Organizer
      PDE Seminars, The Hong Kong University of Science and Technology (Zoom)
    • Int'l Joint Research / Invited
  • [Presentation] Rates of convergence to non-degenerate asymptotic profiles for fast diffusion via energy methods2021

    • Author(s)
      Goro Akagi
    • Organizer
      研究集会「発展方程式の広がり:理論的基礎から実践的応用まで」, 京都大学数理解析研究所 (Zoom)
    • Invited
  • [Presentation] On some quasistatic evolution equation with irreversibility and energy-conservation2021

    • Author(s)
      赤木 剛朗, 佐藤 光汰朗
    • Organizer
      日本数学会 2021年度秋季総合分科会函数方程式論分科会, 千葉大学 (Zoom)
  • [Presentation] Traveling wave dynamics for a one-dimensional constrained Allen-Cahn equation2021

    • Author(s)
      Goro Akagi
    • Organizer
      Asia-Pacific Analysis and PDE Seminar, The University of Sydney (Zoom)
    • Int'l Joint Research / Invited
  • [Presentation] Rates of convergence to non-degenerate asymptotic profiles for fast diffusion equations via an energy method2021

    • Author(s)
      Goro Akagi
    • Organizer
      BIRS-CMO Workshop “New Trends in Nonlinear Diffusion: a Bridge between PDEs, Analysis and Geometry'', Banff International ResearchStation for Mathematical Innovation and Discovery (BIRS)
    • Int'l Joint Research / Invited
  • [Presentation] 非線形拡散方程式の解の漸近挙動について -発展方程式の立場から-2021

    • Author(s)
      赤木 剛朗
    • Organizer
      第42回発展方程式若手セミナー 特別講演 (Zoom)
    • Invited
  • [Presentation] Traveling wave dynamics for constrained Allen-Cahn equations2021

    • Author(s)
      Goro Akagi
    • Organizer
      The 46th Sapporo Symposium on Partial Differential Equations, 北海道大学大学院理学研究院数学部門
    • Invited
  • [Presentation] A framework for proving existence of local-energy solutions to doubly-nonlinear diffusion equations with growing initial data2021

    • Author(s)
      赤木 剛朗
    • Organizer
      応用数学セミナー, 東北大学大学院理学研究科数学専攻
    • 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
    • Int'l Joint Research / Invited
  • [Presentation] Multiple existence of positive even function solutions for a two point boundary value problem on some very narrow possible parameter set2021

    • 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, 千葉大学(Zoom)
  • [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) (Zoom)
    • Int'l Joint Research
  • [Presentation] 空間1次元MEMSモデルにおける定常解と安定性解析2021

    • Author(s)
      若狭 徹
    • Organizer
      第2回オンライン放物型偏微分方程式ワークショップ
    • Invited
  • [Presentation] Weighted Hardy's inequality in a limiting case and the perturbed Kolmogorov equation2021

    • Author(s)
      佐野 めぐみ
    • Organizer
      PDEs and Probability Theory - beyond boundaries ? (Online)
    • Int'l Joint Research / Invited
  • [Presentation] The critical Hardy inequality on the half-space via harmonic transplantation2021

    • Author(s)
      佐野 めぐみ
    • Organizer
      大阪大学微分方程式セミナー, 大阪大学
    • Invited
  • [Presentation] The critical Hardy inequality on the half-space via harmonic transplantation2021

    • Author(s)
      佐野 めぐみ
    • Organizer
      楕円型・放物型微分方程式研究集会, 龍谷大学瀬田キャンパス(Zoom)
    • Invited
  • [Presentation] 調和移植とその関数不等式への応用2021

    • Author(s)
      佐野 めぐみ
    • Organizer
      応用数理解析セミナー、東北大学(オンライン)
    • Invited
  • [Book] 数学のとびら-解析入門2022

    • Author(s)
      柳田 英二
    • Total Pages
      260
    • Publisher
      裳華房
    • ISBN
      978-4-7853-1208-4
  • [Book] 理工系学生のための微分方程式2021

    • Author(s)
      岡山 友昭,佐藤 好久,田上 真,若狭 徹,廣瀬 英雄
    • Total Pages
      181
    • Publisher
      培風館
    • ISBN
      978-4-563-01158-1

URL: 

Published: 2023-12-25  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi