Yokoyama Kazuyoshi 横山和義

… 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

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

Yokoyama Kazuyoshi 横山 和義

横山 和義 ヨコヤマ カズヨシ

Research Projects

Research Products

Co-Researchers

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

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Global solutions to the Cauchy problem for systems of quasi-linear wave equations satisfying the weak null condition

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

On the lifespan and asymptotic behavior of solutions to systems of wave equations with nonlinear terms of long range effects

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

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

Project Period (FY)

Research Category

Research Field

Research Institution

[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)

Journal Title

DOI

Data Source

[Journal Article] Combined effects of two nonlinearities in lifespan of small solutions to semi-linear wave equations2016

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Life span of small solutions to a system of wave equations2016

Author(s)

Journal Title

DOI

Data Source

[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)

Journal Title

NAID

Data Source

[Journal Article] Global small amplitude solutions to systems of nonlinear wave equations with multiple speeds2006

Author(s)

Journal Title

NAID

Data Source

[Presentation] Global existence for a 2-speed and 3-component semilinear system of wave equations in 3D2024

Author(s)

Organizer

Data Source

[Presentation] Global existence and blow up for systems of nonlinear wave equations related to the weak null conditions2021

Author(s)

Organizer

Data Source

[Presentation] Global existence for a system of quasi-linear wave equations in 3 D satisfying the weak null condition2017

Author(s)

Organizer

Data Source

[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)

Organizer

Place of Presentation

Year and Date

Data Source

Yokoyama Kazuyoshi 横山和義

横山和義ヨコヤマカズヨシ