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J-GLOBAL ID：201001077676444787   Update date: Oct. 31, 2024

Masakazu Onitsuka

オニツカ マサカズ | Masakazu Onitsuka
Affiliation and department：
Okayama University of Science Faculty of Science Department of Applied Mathematics

About Okayama University of Science Faculty of Science Department of Applied Mathematics


Job title： Associate Professor
Homepage URL  (1)： https://www.xmath.ous.ac.jp/~onitsuka/
Research field  (2)： Basic analysis ,  Mathematical analysis
Research keywords  (8)： Qualitative Theory of Differential Equations, Difference Equations and Dynamic Equations on Time Scales ,  Oscillatory, Non-oscillatory ,  Box-counting Dimension ,  Rectifiability, Non-rectifiability ,  Ulam Stability ,  Asymptotic Stability, Uniform Asymptotic Stability, Exponential Stability, ,  Dynamic Equations on Time Scales ,  Difference Equations
Research theme for competitive and other funds  (9)：
  • 2020 - 2024 A new departure for qualitative theory of diamond-alpha difference equations
  • 2017 - 2021 フラクタル解析による常微分方程式系の安定性理論の構築
  • 2013 - 2017 Elucidation of global dynamics for damped oscillators and dissipative wave equations and its application to biology
  • 2011 - 2014 2次元非自励系の不安定性理論の構築とその応用
  • 2010 - 2012 New construction of phase space analysis that conforms to low-dimensional dynamical systems
Show all
Papers (65)：
  • Douglas R. Anderson, Masakazu Onitsuka, Donal O'Regan. Best Ulam constants for damped linear oscillators with variable coefficients. Journal of Mathematical Analysis and Applications. 2025
  • Masakazu Onitsuka. APPROXIMATE SOLUTIONS OF GENERALIZED LOGISTIC EQUATION. Discrete and Continuous Dynamical Systems - Series B. 2024. 29. 11. 4505-4526
  • Iz-iddine EL-Fassi, Juan J. Nieto, Masakazu Onitsuka. A new representation for the solution of the Richards-type fractional differential equation. Mathematical Methods in the Applied Sciences. 2024
  • Douglas R. Anderson, Masakazu Onitsuka, Donal O'Regan. Best Ulam constants for two-dimensional nonautonomous linear differential systems. Mathematische Nachrichten. 2024. 297. 9. 3470-3500
  • Masakazu Onitsuka, Satoshi Tanaka. Influence of nonlinearity to box-counting dimensions of spiral orbits for two-dimensional differential systems. Bulletin des Sciences Mathématiques. 2024. 192. 103417. 1-27
ｍore...
MISC (8)：
  • 鬼塚 政一. 行列係数をもつ線形微分方程式のウラム安定性について. 数理解析研究所講究録「常微分方程式の定性的理論とその現象解析への応用」. 2023. 2244. 71-84
  • Converse theorems on exponential stability for nonautonomous half-linear differential systems (Qualitative theory of ordinary differential equations in real domains). 2016. 1993. 26-36
  • Masakazu Onitsuka. Attractivity and stability for nonautonomous half-linear differential systems. 数理解析研究所講究録「常微分方程式の定性的理論の新展開」. 2014. 1901. 55-68
  • Masakazu Onitsuka. Uniform asymptotic stability for two-dimensional linear systems whose anti-diagonals are allowed to change sign. 数理解析研究所講究録「関数方程式の定性的理論の新展開」. 2012. 1786. 128-141
  • Onitsuka Masakazu. Asymptotic stability and uniform asymptotic stability for second-order linear differential equations with damping (Modeling and Complex analysis for functional equations). RIMS Kokyuroku. 2008. 1582. 151-160
ｍore...
Professional career (1)：
  • 博士(理学) (島根大学)
Association Membership(s) (2)：
International Society of Difference Equations ,  THE MATHEMATICAL SOCIETY OF JAPAN
※ Researcher’s information displayed in J-GLOBAL is based on the information registered in researchmap. For details, see here.

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