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Studies on the null condition for nonlinear hyperbolic and dispersive equations

Research Project

Project/Area Number 18740066
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Basic analysis
Research InstitutionOsaka University (2007-2008)
University of Tsukuba (2006)

Principal Investigator

SUNAGAWA Hideaki  Osaka University, 大学院理学研究科, 准教授 (80375394)

Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,730,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥330,000)
Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2006: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywords関数方程式 / シュレディンガー方程式 / クライン・ゴルドン方程式 / 零条件 / 非線型シュレディンガー方程式 / 消散構造
Research Abstract

双曲型および分散型の非線型偏微分方程式に対する零条件を確立し,種々の非線型波動現象の背後に潜む数学的構造を抽出することを目標として研究を行った.1年目は微分型の非線型シュレディンガー方程式について考察し,方程式にゲージ不変性がある場合には満足できる結果が得られた.2年目は非線型シュレディンガー方程式における非線型消散構造の特徴づけに成功した.3年目は質量共鳴下での非線型クライン・ゴルドン方程式系においてエネルギーの増大が起こらないための非線型項の形状に関するひとつの十分条件を得た.

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (13 results)

All 2008 2007 2006

All Journal Article (8 results) (of which Peer Reviewed: 7 results) Presentation (5 results)

  • [Journal Article] The lifespan of solutions to nonlinear Schrodinger and Klein-Gordon equations2008

    • Author(s)
      H. Sunagawa
    • Journal Title

      Hokkaido Math. J. vol.37, no.4

      Pages: 825-838

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] On the Schrodinger equation with dissipative nonlinearities of derivative type2008

    • Author(s)
      N. Hayashi, P. I. Naumkin, H. Sunagawa
    • Journal Title

      SIAM J. Math. Anal. vol.40, no.1

      Pages: 278-291

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] On the Schrodinger equation with dissipative nonlinearities of derivative type2008

    • Author(s)
      N. Hayashi, P. I. Naumkin, H. Sunagawa
    • Journal Title

      SIAM J. Math. Anal 40

      Pages: 278-291

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The lifespan of solutions to nonlinear Schrodinger and Klein-Gordon equations2008

    • Author(s)
      H. Sunagawa
    • Journal Title

      Hokkaido Math. J 37

      Pages: 825-838

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 非線型Klein-Gordon方程式の解の長時間挙動について2007

    • Author(s)
      砂川秀明
    • Journal Title

      日本数学会「数学」 第59巻4号

      Pages: 367-379

    • NAID

      10019989612

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] 非線型Klein-Gordon方程式の解の長時間挙動について2007

    • Author(s)
      砂川 秀明
    • Journal Title

      数学 59

      Pages: 367-379

    • NAID

      10019989612

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Remarks on global behavior of solutions to nonlinear Schrodinger equations2006

    • Author(s)
      Y. Kawahara, H. Sunagawa
    • Journal Title

      Proc. Japan Acad. Ser. A vol.82, no.8

      Pages: 117-122

    • NAID

      40015182012

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Remarks on global behavior of solutions to nonlinear Schrodinger equations2006

    • Author(s)
      Y.Kawahara, H.Sunagawa
    • Journal Title

      Proceedings of the Japan Academy, Series A 82巻8号

      Pages: 117-122

    • NAID

      40015182012

    • Related Report
      2006 Annual Research Report
  • [Presentation] 双曲型および分散型方程式の非線型摂動について2008

    • Author(s)
      砂川秀明
    • Organizer
      奈良偏微分方程式研究会
    • Place of Presentation
      奈良女子大学
    • Year and Date
      2008-03-20
    • Related Report
      2008 Final Research Report
  • [Presentation] On the Schrodinger equation with dissipative nonlinearities of derivative type2007

    • Author(s)
      H. Sunagawa
    • Organizer
      International conference on nonlinear wave equations
    • Place of Presentation
      北海道大学
    • Year and Date
      2007-08-27
    • Related Report
      2008 Final Research Report
  • [Presentation] On the Schroedinger equation with dissipative nonlinearities of derivative type2007

    • Author(s)
      砂川 秀明
    • Organizer
      Nonlinear Wave Equations
    • Place of Presentation
      北海道大学
    • Year and Date
      2007-08-27
    • Related Report
      2007 Annual Research Report
  • [Presentation] On cubic NLS and NLKG with dissipative structure2007

    • Author(s)
      H. Sunagawa
    • Organizer
      JAMI conference on nonlinear dispersive equations
    • Place of Presentation
      ジョンズ ホプキンス大学
    • Year and Date
      2007-03-17
    • Related Report
      2008 Final Research Report
  • [Presentation] Lifespanの漸近評価から見た非線型Schrodinger方程式とその周辺2006

    • Author(s)
      砂川秀明
    • Organizer
      日本数学会2006 年度秋季総合分科会(函数方程式論分科会特別講演)
    • Place of Presentation
      大阪市立大学
    • Year and Date
      2006-09-22
    • Related Report
      2008 Final Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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