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Verified numerical computation for solutions to partial differential equations describing reaction diffusion models

Research Project

Project/Area Number 17H07188
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Foundations of mathematics/Applied mathematics
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) 2017-08-25 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords精度保証付き数値計算 / 反応拡散モデル / 偏微分方程式 / 正値解 / 計算機援用証明 / 応用数学
Outline of Final Research Achievements

This study developed verified numerical computation methods for the following reaction diffusion model
∂u/∂t(t,x) = △u(t,x)+f(x,u(t,x)), t∈(0,∞), x∈Ω (1).
More precisely,the study, especially focusing on the stationary problem with respect to (1), developed a numerical method of enclosing positive solutions in the strict mathematical sense. The method ensures the existence of an exact solution of (1) nearby its numerical approximation with strict error bounds,at the same time guaranteeing the positively of the exact solution in the strict mathematical sense.

Academic Significance and Societal Importance of the Research Achievements

精度保証付き数値計算は全ての誤差を考慮して数学的に正しい結果を得ることから近年世界的に注目を集めている技術であり、対象とするモデル(1)の性質上その正値解が重要となることが多い。国内外の関連する研究では「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、本研究はそこに正値性の保証という新たな視点を与えることができ、この点において独創的である。本研究で得られたアルゴリズムを用いれば、近似解の近傍に真解の存在性を証明するだけでなく、従来の精度保証技術では成し得なかった符号の保証をすることができ、より高信頼な結果を与えることができる。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • Research Products

    (15 results)

All 2019 2018 2017

All Journal Article (5 results) (of which Peer Reviewed: 3 results,  Open Access: 5 results) Presentation (10 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] Improvement of Numerical Verification Results of Semilinear Elliptic Boundary Value Problems2019

    • Author(s)
      酒井将大, 田中一成, 大石進一
    • Journal Title

      Transactions of the Japan Society for Industrial and Applied Mathematics

      Volume: 29 Issue: 1 Pages: 17-45

    • DOI

      10.11540/jsiamt.29.1_17

    • NAID

      130007618980

    • ISSN
      2424-0982
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Estimation of Sobolev embedding constant on a domain dividable into bounded convex domains2017

    • Author(s)
      Mizuguchi Makoto、Tanaka Kazuaki、Sekine Kouta、Oishi Shin’ichi
    • Journal Title

      Journal of Inequalities and Applications

      Volume: 2017 Issue: 1 Pages: 1-18

    • DOI

      10.1186/s13660-017-1571-0

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Numerical validation of blow-up solutions of ordinary differential equations2017

    • Author(s)
      A. Takayasu, K. Matsue, Kaname, T. Sasaki, K. Tanaka, M.Mizuguchi and S. Oishi
    • Journal Title

      J. Comput. Appl. Math.

      Volume: 314 Pages: 10-29

    • DOI

      10.1016/j.cam.2016.10.013

    • NAID

      120007135196

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] ある無限次元固有値を用いた楕円型偏微分方程式の解の存在性に対する計算機援用証明法2017

    • Author(s)
      関根晃太, 田中一成, 大石進一
    • Journal Title

      RIMS Kokyuroku

      Volume: 2037 Pages: 96-105

    • Related Report
      2017 Annual Research Report
    • Open Access
  • [Journal Article] Numerical verification method for positivity of solutions to elliptic equations2017

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

      RIMS Kokyuroku

      Volume: 2037 Pages: 125-140

    • Related Report
      2017 Annual Research Report
    • Open Access
  • [Presentation] 精度保証付き数値計算を用いた楕円型境界値問題の解の符号変化構造解析2019

    • Author(s)
      田中一成
    • Organizer
      数学と諸分野の連携にむけた若手数学者交流会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Numerical verification method for elliptic problems with sign change information2018

    • Author(s)
      Kazuaki Tanaka, Kazunaga Tanaka
    • Organizer
      The 18th International Symposium on Scientific Computing, Computer Arithmetic, and Verified Numerical Computations (SCAN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical verification method for positive solutions of Allen-Cahn equation using sub- and super-solution method2018

    • Author(s)
      Yuta Matsushima, Kazuaki Tanaka, Shin’ichi Oishi
    • Organizer
      The 18th International Symposium on Scientific Computing, Computer Arithmetic, and Verified Numerical Computations (SCAN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Estimation of Sobolev embedding constant on a bounded convex domain2018

    • Author(s)
      Makoto Mizuguchi, Kazuaki Tanaka, Kouta Sekine, Shin’ichi Oishi
    • Organizer
      The 18th International Symposium on Scientific Computing, Computer Arithmetic, and Verified Numerical Computations (SCAN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 半線形楕円型境界値問題の高エネルギー解に対する精度保証付き数値計算2018

    • Author(s)
      酒井将大, 田中一成, 大石進一
    • Organizer
      日本応用数理学会2017年度連合発表会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 優解劣解法を用いたアレンカーン方程式の解の精度保証付き数値計算2018

    • Author(s)
      松嶋佑汰, 田中一成, 大石進一
    • Organizer
      日本応用数理学会2017年度連合発表会
    • Related Report
      2017 Annual Research Report
  • [Presentation] アレン・カーン方程式の解に対する精度保証付き数値計算2018

    • Author(s)
      田中一成
    • Organizer
      CREST・さきがけ数学関連領域合同シンポジウム ―数学パワーが世界を変える2018―
    • Related Report
      2017 Annual Research Report
  • [Presentation] Computer assisted analysis of stationary problem of Allen-Cahn equation2017

    • Author(s)
      Shin'ichi Oishi, Kazuaki Tanaka
    • Organizer
      International Workshop on Industrial Mathematics 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical method for estimating the best constant in Sobolev type inequality on unit square2017

    • Author(s)
      Kazuaki Tanaka, Kouta Sekine, Makoto Mizuguchi, Shin'ichi Oishi
    • Organizer
      The International Workshop on Numerical Verification and its Applications
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 前処理ソート付き逐次添加法によるドロネー性保証付き三角形分割法2017

    • Author(s)
      若山馨太, 金子直樹, 田中一成, 関根晃太, 尾崎克久, 大石進一
    • Organizer
      日本応用数理学会2017年度年会
    • Related Report
      2017 Annual Research Report

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Published: 2017-08-25   Modified: 2023-06-13  

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