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Sign-change structure analysis for reaction-diffusion models based on rigorous numerical computation

Research Project

Project/Area Number 19K14601
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 12040:Applied mathematics and statistics-related
Research InstitutionWaseda University

Principal Investigator

Tanaka Kazuaki  早稲田大学, 理工学術院総合研究所, 次席研究員(研究院講師) (00801226)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords精度保証付き数値計算 / 計算機援用証明 / 符号変化構造解析 / 反応拡散モデル
Outline of Research at the Start

本研究の目的は精度保証付き数値計算を用いて反応拡散モデルの符号変化構造解析を行い、数学的視点から現象解明に貢献することである。例えばアレン・カーン方程式は水の状態変化や合金の生成過程等を表す重要な方程式であり、重要な研究対象の1つである。
反応拡散モデルの解の存在を数学的に厳密な意味で保証しかつその符号変化構造を明らかにする。即ち対象問題の真解uが数値近似解の付近に存在することを具体的な誤差上限と共に保証し、更にuの符号変化構造をも数学的に厳密な意味で保証をするということが本研究の目的である。

Outline of Final Research Achievements

The aim of this research was to conduct a sign-change structure analysis of reaction-diffusion models using guaranteed-accuracy numerical computation, thereby contributing to elucidating phenomena from a mathematical perspective. The PI established a method to post-validate the positivity of the true solution using the information on the eigenvalues of the operators describing the model and the results of guaranteed accuracy (inclusion information of solutions). This method was applied to the Allen-Cahn equation (a reaction-diffusion model that describes water state changes and phase separation phenomena) and successfully provided proof of the coexistence relationship of the liquid phase layers.

Academic Significance and Societal Importance of the Research Achievements

反応拡散モデルを含む微分方程式の解に対する精度保証付き数値計算の従来研究は「近似解の数値計算→精度保証」というプロセスの速度向上や、得られる結果の高精度化に焦点が当てられていたが、研究代表者はそこに「符号の保証」という新たな価値を与えた。この着眼点が評価され、精度保証という研究分野が発足した当初から40年以上の歴史を持ち、現在も最も権威があるとされる国際学会SCANの基調講演者として招待された。

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

    (27 results)

All 2023 2022 2021 2020 2019

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 6 results) Presentation (20 results) (of which Int'l Joint Research: 5 results,  Invited: 7 results)

  • [Journal Article] Rigorous Numerical Enclosures for Positive Solutions of Lane?Emden’s Equation with Sub-Square Exponents2022

    • Author(s)
      Tanaka Kazuaki、Plum Michael、Sekine Kouta、Kashiwagi Masahide、Oishi Shin’ichi
    • Journal Title

      Numerical Functional Analysis and Optimization

      Volume: 43 Issue: 3 Pages: 322-349

    • DOI

      10.1080/01630563.2022.2029485

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A posteriori verification of the positivity of solutions to elliptic boundary value problems2022

    • Author(s)
      Tanaka Kazuaki、Asai Taisei
    • Journal Title

      Partial Differential Equations and Applications

      Volume: 3 Issue: 1

    • DOI

      10.1007/s42985-021-00143-2

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Inverse norm estimation of perturbed Laplace operators and corresponding eigenvalue problems2022

    • Author(s)
      Sekine Kouta、Tanaka Kazuaki、Oishi Shin'ichi
    • Journal Title

      Computers & Mathematics with Applications

      Volume: 106 Pages: 18-26

    • DOI

      10.1016/j.camwa.2021.12.002

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Numerical verification for asymmetric solutions of the H?non equation on bounded domains2022

    • Author(s)
      Asai Taisei、Tanaka Kazuaki、Oishi Shin’ichi
    • Journal Title

      Journal of Computational and Applied Mathematics

      Volume: 399 Pages: 113708-113708

    • DOI

      10.1016/j.cam.2021.113708

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A posteriori verification for the sign-change structure of solutions of elliptic partial differential equations2021

    • Author(s)
      Tanaka Kazuaki
    • Journal Title

      Japan Journal of Industrial and Applied Mathematics

      Volume: - Issue: 3 Pages: 731-756

    • DOI

      10.1007/s13160-021-00456-0

    • NAID

      210000178465

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Numerical verification for positive solutions of Allen–Cahn equation using sub- and super-solution method2020

    • Author(s)
      Matsushima Yuta、Tanaka Kazuaki、Oishi Shin’ichi
    • Journal Title

      Journal of Advanced Simulation in Science and Engineering

      Volume: 7 Issue: 1 Pages: 136-150

    • DOI

      10.15748/jasse.7.136

    • NAID

      130007852293

    • ISSN
      2188-5303
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Numerical verification method for positive solutions of elliptic problems2020

    • Author(s)
      Tanaka Kazuaki
    • Journal Title

      Journal of Computational and Applied Mathematics

      Volume: 370 Pages: 112647-112647

    • DOI

      10.1016/j.cam.2019.112647

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 楕円型偏微分方程式の解符号検証法といくつかの課題2023

    • Author(s)
      田中一成
    • Organizer
      科学計算・計測工学連携ワークショップ
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 微分方程式に対する精度保証付き数値計算法とニューラルネットワークによる解の包含2022

    • Author(s)
      田中一成
    • Organizer
      RIMS共同研究(公開型)数値解析が拓く次世代情報社会~エッジから富岳まで~
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Batt-Faltenbacher-Horst方程式の解の精度保証付き数値計算2022

    • Author(s)
      多田秀介, 浅井大晴, 田中一成, 大石進一
    • Organizer
      日本応用数理学会2022年度年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 楕円型偏微分方程式の解の包含から分かること2022

    • Author(s)
      田中一成
    • Organizer
      第3回 数学と諸分野の連携に向けた若手数学者交流会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Verification of sign-change structure for elliptic partial differential equations2021

    • Author(s)
      Kazuaki Tanaka
    • Organizer
      The 19th International Symposium on Scientific Computing, Computer Arithmetic, and Verified Numerical Computations (SCAN 2020)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Numerical verification for positive solutions of the Henon equation on some bounded domain2021

    • Author(s)
      Taisei Asai, Kazuaki Tanaka, Shin’ichi Oishi
    • Organizer
      The 40th JSST Annual International Conference on Simulation Technology (JSST 2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 常微分方程式に対する計算機援用解析2021

    • Author(s)
      田中一成
    • Organizer
      RIMS共同研究(公開型)「常微分方程式の定性的理論とその応用」
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] エノン方程式の解に対する正値性検証法2020

    • Author(s)
      田中一成
    • Organizer
      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] 精度保証付き数値計算を用いたHenon方程式の対称性に関する考察2020

    • Author(s)
      浅井大晴, 田中一成, 大石進一
    • Organizer
      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] 楕円型境界値問題に対する解符号の事後検証法2020

    • Author(s)
      田中一成, 浅井大晴
    • Organizer
      日本応用数理学会2020年度年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 精度保証付き数値計算を用いたHenon方程式の多重解の存在証明2020

    • Author(s)
      浅井大晴, 田中一成, 大石進一
    • Organizer
      日本応用数理学会2020年度年会
    • Related Report
      2020 Research-status Report
  • [Presentation] A priori error estimates for Poisson's equation with discontinuous coefficients2020

    • Author(s)
      田中一成, 中尾充宏
    • Organizer
      日本応用数理学会2019年度連合発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] Numerical verification for positive global-in-time solutions of Allen-Cahn equation in three space dimensions using sub- and super-solution method2019

    • Author(s)
      Yuta Matsushima, Kazuaki Tanaka, and Shin’ichi Oishi
    • Organizer
      The 38th JSST Annual International Conference on Simulation Technology
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Numerical verification for asymmetric solutions of the Henon equation2019

    • Author(s)
      Taisei Asai, Kazuaki Tanaka, and Shin’ichi Oish
    • Organizer
      The 38th JSST Annual International Conference on Simulation Technology
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Rigorous solution-enclosures of elliptic problems and its application to the best embedding constants, Minisymposium "Numerical verification methods and their application to differential equations"2019

    • Author(s)
      Kazuaki Tanaka, Kouta Sekine
    • Organizer
      9th International Congress on Industrial and Applied Mathematics - ICIAM 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 優解劣解法を用いた Allen-Cahn 方程式の正値解に対する精度保証付き数値計算2019

    • Author(s)
      松嶋佑汰, 田中一成, 大石進一
    • Organizer
      2019年度応用数学合同研究集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 精度保証付き数値計算を用いた Henon 方程式の非対称解の存在証明2019

    • Author(s)
      浅井大晴, 田中一成, 大石進一
    • Organizer
      2019年度応用数学合同研究集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 楕円型方程式の弱解に対する正値性証明法2019

    • Author(s)
      田中一成
    • Organizer
      日本応用数理学会2019年度年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 空間3次元Allen-Cahn方程式の正値時間大域解に対する精度保証付き数値計算法2019

    • Author(s)
      松嶋佑汰, 田中一成, 大石進一
    • Organizer
      日本応用数理学会2019年度年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Henon方程式の非対称解に対する精度保証付き数値計算2019

    • Author(s)
      浅井大晴, 田中一成, 大石進一
    • Organizer
      日本応用数理学会2019年度年会
    • Related Report
      2019 Research-status Report

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

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