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Yokoyama Kazuyoshi  横山 和義

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… Alternative Names

横山 和義  ヨコヤマ カズヨシ

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Researcher Number 20316243
Other IDs
Affiliation (Current) 2025: 北海道科学大学, 工学部, 教授
Affiliation (based on the past Project Information) *help 2021 – 2024: 北海道科学大学, 工学部, 教授
2015 – 2017: 北海道科学大学, 工学部, 准教授
2006: 北海道工業大学, 総合教育研究部, 准教授
2004 – 2005: 北海道工業大学, 総合教育研究部, 助教授
Review Section/Research Field
Principal Investigator
Global analysis
Except Principal Investigator
Basic Section 12020:Mathematical analysis-related / Mathematical analysis
Keywords
Principal Investigator
null condition / 解の正則性 / 時間大域解 / 非線形波動方程式 / KSS評価 / エネルギー評価 / 減衰評価 / 解の挙動 / KSS不等式 / 波動方程式 … More
Except Principal Investigator
… More 時間大域解 / 零条件 / 非線形波動方程式 / wave equation / 波動方程式 / null condition / 初期値問題 / weak null condition / 解の爆発 / 弱零条件 / 準線形波動方程式 / blow up / global existence / 半線形波動方程式 / global solution / lifespan / 退化条件 / 最大存在時間 / chain rule / 分数階微分 / Strichartz型評価式 / 適切性 / half wave equation / nonlinear wave equations Less
  • Research Projects

    (4 results)
  • Research Products

    (9 results)
  • Co-Researchers

    (2 People)
  •  Weak null condition and (non) existence of global solutions to systems of wave equations

    • Principal Investigator
      肥田野 久二男
    • Project Period (FY)
      2024 – 2026
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 12020:Mathematical analysis-related
    • Research Institution
      Mie University
  •  Global solutions to the Cauchy problem for systems of quasi-linear wave equations satisfying the weak null condition

    • Principal Investigator
      Hidano Kunio
    • Project Period (FY)
      2021 – 2023
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 12020:Mathematical analysis-related
    • Research Institution
      Mie University
  •  On the lifespan and asymptotic behavior of solutions to systems of wave equations with nonlinear terms of long range effects

    • Principal Investigator
      HIDANO KUNIO
    • Project Period (FY)
      2015 – 2017
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Mathematical analysis
    • Research Institution
      Mie University
  •  非線形波動方程式の初期・境界値問題に関する研究Principal Investigator

    • Principal Investigator
      横山 和義
    • Project Period (FY)
      2004 – 2006
    • Research Category
      Grant-in-Aid for Young Scientists (B)
    • Research Field
      Global analysis
    • Research Institution
      Hokkaido Institute of Technology

All 2024 2021 2018 2017 2016 2015 2006

All Journal Article Presentation

  • [Journal Article] Global existence for a system of quasi-linear wave equations in 3D satisfying the weak null condition 【掲載確定】2018

    • Author(s)
      Kunio Hidano and Kazuyoshi Yokoyama
    • Journal Title

      International Mathematics Research Notices

      Volume: - Issue: 1 Pages: 39-70

    • DOI

      10.1093/imrn/rny024

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15K04955, KAKENHI-PROJECT-18K03365
  • [Journal Article] Combined effects of two nonlinearities in lifespan of small solutions to semi-linear wave equations2016

    • Author(s)
      Kunio Hidano, Chengbo Wang and Kazuyoshi Yokoyama
    • Journal Title

      Mathematische Annalen

      Volume: 366 Issue: 1-2 Pages: 667-694

    • DOI

      10.1007/s00208-015-1346-1

    • Peer Reviewed / Acknowledgement Compliant / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15K04955
  • [Journal Article] Life span of small solutions to a system of wave equations2016

    • Author(s)
      Kunio Hidano and Kazuyoshi Yokoyama
    • Journal Title

      Nonlinear Analysis Series A: Theory, Methods & Applications

      Volume: 139 Pages: 106-130

    • DOI

      10.1016/j.na.2016.02.020

    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-15K04955
  • [Journal Article] Space-time L^2-estimates and life-span of the Klainerman-Machedon radial solutions to some semi-linear wave equations.2006

    • Author(s)
      肥田野久二男, 横山和義
    • Journal Title

      Differential and Integral Equations 19巻9号

      Pages: 961-980

    • NAID

      120006459367

    • Data Source
      KAKENHI-PROJECT-16740097
  • [Journal Article] Global small amplitude solutions to systems of nonlinear wave equations with multiple speeds2006

    • Author(s)
      片山 聡一郎, 横山 和義
    • Journal Title

      Osaka Journal of Mathematics 43巻2号(未定)

    • NAID

      120006459399

    • Data Source
      KAKENHI-PROJECT-16740097
  • [Presentation] Global existence for a 2-speed and 3-component semilinear system of wave equations in 3D2024

    • Author(s)
      肥田野 久二男, 横山 和義
    • Organizer
      日本数学会 2024年度年会
    • Data Source
      KAKENHI-PROJECT-21K03324
  • [Presentation] Global existence and blow up for systems of nonlinear wave equations related to the weak null conditions2021

    • Author(s)
      横山 和義
    • Organizer
      The 18th Linear and Nonlinear Waves
    • Invited
    • Data Source
      KAKENHI-PROJECT-21K03324
  • [Presentation] Global existence for a system of quasi-linear wave equations in 3 D satisfying the weak null condition2017

    • Author(s)
      肥田野 久二男,横山 和義
    • Organizer
      日本数学会2017年度秋季総合分科会
    • Data Source
      KAKENHI-PROJECT-15K04955
  • [Presentation] ある半線形波動方程式系に対する解の最大存在時間について2015

    • Author(s)
      横山 和義
    • Organizer
      日本数学会2015年度秋季総合分科会
    • Place of Presentation
      京都産業大学(京都市北区)
    • Year and Date
      2015-09-15
    • Data Source
      KAKENHI-PROJECT-15K04955
  • 1.  HIDANO KUNIO (00285090)
    # of Collaborated Projects: 3 results
    # of Collaborated Products: 5 results
  • 2.  星賀 彰 (60261400)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results

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