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Mechanism of singularity preservation for solutions in parabolic equations

Research Project

Project/Area Number 19K14567
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 12020:Mathematical analysis-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

Takahashi Jin  東京工業大学, 情報理工学院, 助教 (40813001)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords半線形熱方程式 / fast diffusion方程式 / 多孔質媒体方程式 / 特異解 / 臨界指数 / 可解性 / 山辺流 / 初期値境界値問題 / Hardyポテンシャル / 藤田型方程式 / 多孔質媒体型方程式 / 高次元特異集合 / 時間全域解 / Fast diffusion equation / 特異点 / 非斉次 / 放物型方程式 / 偏微分方程式 / 非線形解析 / 特異性
Outline of Research at the Start

本研究の目的は放物型方程式の解が動的な特異性を保持するためのメカニズムを解明し,特異解の構造を理解することである.近年,半線形熱方程式に対し動的特異点を持つ解(時間依存して動く1点に特異性を保持する解)が構成され,特異解の分類も含めて様々な進展があった.しかし多孔質媒体型方程式,ポテンシャル付き熱方程式,半線形熱方程式の連立系といった放物型方程式に対しては分かっていないことが多々ある.本研究においてはこれらの方程式を高次元特異集合も含めて扱い,動的な特異性を持つ解の分類と構成を行う.そして,個別の問題に共通する特異性保持メカニズムを抽出することで統一的視点を探る.

Outline of Final Research Achievements

For the semilinear heat equation (a typical example of a nonlinear parabolic partial differential equation), we constructed solutions with a time-dependent singularity and specified the behavior of the solutions near the singular point. Moreover, in view of the loss of singularity, we also studied initial value problems and initial boundary value problems. Then, we obtained sharp conditions for the solvability of the problems.
For the fast diffusion equation (an example of a parabolic equation with nonlinear diffusion), we constructed new types of singular solutions such as snaking singularity and anisotropic singularity. Furthermore, we found a relation between the blow-down of singularity in the fast diffusion equation and the disappearance of completeness in the corresponding geometric flow.

Academic Significance and Societal Importance of the Research Achievements

偏微分方程式論における解の特異性はこれまで盛んに研究されてきた.しかし,特異性を保持する解や,その位置が時間依存して動くようなものはあまり扱われてこなかった.本研究においては非線形放物型偏微分方程式の典型例に対し,ある種の臨界的状況において特異解を構成し解析するとともに幾何との関連も得ている.それゆえ,特異解の研究を大きく進展させ,さらに広がりを与えたという学術的意義がある.

Report

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

    (36 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (7 results) Journal Article (10 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 10 results) Presentation (19 results) (of which Int'l Joint Research: 6 results,  Invited: 19 results)

  • [Int'l Joint Research] Comenius University(スロバキア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Comenius University(スロバキア)

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

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] National Taiwan Normal University(台湾)

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

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Comenius University(スロバキア)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Comenius University(スロバキア)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Infinite-time incompleteness of noncompact Yamabe flow2022

    • Author(s)
      Takahashi Jin、Yamamoto Hikaru
    • Journal Title

      Calculus of Variations and Partial Differential Equations

      Volume: 61 Issue: 6

    • DOI

      10.1007/s00526-022-02331-3

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Anisotropic and isotropic persistent singularities of solutions of the fast diffusion equation2022

    • Author(s)
      Fila Marek、Mackova Petra、Takahashi Jin、Yanagida Eiji
    • Journal Title

      Differential and Integral Equations

      Volume: 35 Issue: 11/12 Pages: 729-748

    • DOI

      10.57262/die035-1112-729

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Entire solutions with moving singularities for a semilinear heat equation with a critical exponent2022

    • Author(s)
      Takahashi Jin
    • Journal Title

      Partial Differential Equations and Applications

      Volume: 3 Issue: 2

    • DOI

      10.1007/s42985-022-00164-5

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Solutions with snaking singularities for the fast diffusion equation2021

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

      Transactions of the American Mathematical Society

      Volume: 374 Issue: 12 Pages: 8775-8792

    • DOI

      10.1090/tran/8479

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Optimal singularities of initial data for solvability of the Hardy parabolic equation2021

    • Author(s)
      Hisa Kotaro、Takahashi Jin
    • Journal Title

      Journal of Differential Equations

      Volume: 296 Pages: 822-848

    • DOI

      10.1016/j.jde.2021.06.011

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Existence of solutions with moving singularities for a semilinear heat equation with a critical exponent2021

    • Author(s)
      Takahashi Jin
    • Journal Title

      Journal de Mathematiques Pures et Appliquees

      Volume: 148 Pages: 128-149

    • DOI

      10.1016/j.matpur.2021.02.007

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [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

      Journal of Evolution Equations

      Volume: - Issue: 2 Pages: 2141-2165

    • DOI

      10.1007/s00028-021-00675-5

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Existence of solutions for an inhomoge- neous fractional semilinear heat equation2020

    • Author(s)
      K. Hisa, K. Ishige, J. Takahashi
    • Journal Title

      Nonlinear Anal.

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Moving singularities for nonlinear diffusion equations in two space dimensions2020

    • Author(s)
      M. Fila, P. Mackova, J. Takahashi, E. Yanagida
    • Journal Title

      J. Elliptic Parabol. Equ.

      Volume: - Issue: 1 Pages: 155-169

    • DOI

      10.1007/s41808-020-00062-0

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Critical exponents for the fast diffusion equation with a nonlinear boundary condition2020

    • Author(s)
      Sato Ryuichi、Takahashi Jin
    • Journal Title

      Journal of Mathematical Analysis and Applications

      Volume: 482 Issue: 1 Pages: 123526-123526

    • DOI

      10.1016/j.jmaa.2019.123526

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Blow-up of the critical norm for a supercritical semilinear heat equation2023

    • Author(s)
      高橋仁
    • Organizer
      Seminar at Johns Hopkins University
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Blow-up of the critical norm for a supercritical semilinear heat equation2023

    • Author(s)
      高橋仁
    • Organizer
      静岡大学におけるセミナー
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Sobolev優臨界な藤田型方程式における臨界ノルム爆発について2022

    • Author(s)
      高橋仁
    • Organizer
      発展方程式における形状解析と漸近解析
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Critical norm blow-up for a supercritical semilinear heat equation2022

    • Author(s)
      高橋仁
    • Organizer
      Mathematical Analysis on Fluid Dynamics and Conservation Laws
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Critical norm blow-up for a supercritical semilinear heat equation2022

    • Author(s)
      高橋仁
    • Organizer
      Seminar on Qualitative Theory of Differential Equations
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Infinite-time blow-down of singular solutions in the fast diffusion equation2022

    • Author(s)
      Jin Takahashi
    • Organizer
      SIAM Conference on Analysis of PDE
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Existence of solutions with moving singularities for a semilinear heat equation with a critical exponent2021

    • Author(s)
      高橋仁
    • Organizer
      京都大学 NLPDE セミナー
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Fast diffusion方程式における特異解の無限時間blow-downについて2021

    • Author(s)
      高橋仁
    • Organizer
      神戸大学解析セミナー
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] ある臨界指数を持つ半線形熱方程式に対する動的特異点を持つ解の存在について2021

    • Author(s)
      高橋仁
    • Organizer
      広島数理解析セミナー
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Hardy parabolic equationの時間局所可解性について2021

    • Author(s)
      高橋仁
    • Organizer
      応用解析研究会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 非斉次半線形熱方程式のシャープな可解性条件について2020

    • Author(s)
      高橋仁
    • Organizer
      Elliptic & Parabolic セミナー
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] $u_t-\Delta u=u^\frac{N}{N-2}$に対する動的特異点を持つ解の構成2020

    • Author(s)
      高橋仁
    • Organizer
      楕円型・放物型方程式の集いの会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] ある臨界指数を持つ藤田型方程式に対する動的特異点を持つ解の存在について2020

    • Author(s)
      高橋仁
    • Organizer
      鳥取 PDE 研究集会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] ある臨界指数を持つ半線形熱方程式における動的特異点を持つ解の存在について2020

    • Author(s)
      高橋仁
    • Organizer
      九州関数方程式セミナー
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Existence of solutions with moving singularities for a semilinear heat equation with a critical exponent2020

    • Author(s)
      J. Takahashi
    • Organizer
      Seminar on Qualitative Theory of Differential Equations, Comenius University, Slovakia
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Existence of solutions with time-dependent singular sets for the heat equation with absorption, Singular Problems,2019

    • Author(s)
      J. Takahashi
    • Organizer
      Blow-up, and Regimes with Peaking in Nonlinear PDEs, RUDN University, Russia
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Existence of solutions to an inhomogeneous fractional heat equation2019

    • Author(s)
      J. Takahashi
    • Organizer
      Seminar on Qualitative Theory of Differential Equations, Comenius University, Slovakia
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Existence of solutions with moving singularities for equations of porous medium type2019

    • Author(s)
      高橋仁
    • Organizer
      Workshop on Nonlinear PDE in Numazu, 沼津市民文化センター
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Existence of solutions with time-dependent singular sets for the heat equation with absorption2019

    • Author(s)
      J. Takahashi
    • Organizer
      VI Italian-Japanese Workshop “Geometric properties for parabolic and elliptic PDE’s”, Palazzone di Cortona, Italy
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2019-04-18   Modified: 2024-01-30  

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