Researchers & Faculty
Japanese
Kazuyoshi Yokoyama
Department / Course
Hokkaido University of Science Faculty of Engineering Department of Electrical and Electronic Engineering
Job
Professor
Book and thesis
Papers
Global existence for null-form wave equations with data in a Sobolev space of lower
regularity and weight Hokkaido Mathematical Journal 52 (2),pp.197-251 (Co-authored) 2023
Papers
Global existence for a system of multiple-speed wave equations violating the null condition Tohoku Mathematical Journal 74 (4),pp.597-626 (Co-authored) 2022/12
Papers
Global existence and blow up for systems of nonlinear wave equations related to the weak null condition Discrete and Continuous Dynamical Systems 42 (9),pp.4385-4414 (Co-authored) 2022/09
Papers
Global Existence for a System of Quasi-Linear Wave Equations in 3D Satisfying the Weak
Null Condition International Mathematics Research Notices. IMRN, Vol. 2020,pp.39-70 (Co-authored) 2020/01
Papers
Combined effects of two nonlinearities in lifespan of small solutions to semi-linear wave equations Mathematische Annalen, Vol. 366 (No. 1-2.),pp.667-694 (Co-authored) 2016/07
Papers
Life span of small solutions to a system of wave equations Nonlinear Analysis, Vol. 139,pp.106-130 (Co-authored) 2016/07
Papers
The Glassey conjecture with radially symmetric data Journal de Mathe'matiques Pures et Applique'es, Vol.98 (No.5),pp.518-541 (Co-authored) 2012/11
Papers
On almost global existence and local well posedness for some 3-D quasi-linear wave equations Advances in Differential Equations, Vol.17 (No.3-4.),pp.267-306 (Co-authored) 2012/03
Papers
Space-time L^2-estimates and life-span of the Klainerman-Machedon radial solutions to some semi-linear wave equations Differential and Integral Equations, Vol.19 (No.9),pp.961-980 (Co-authored) 2006/10
Papers
Global small amplitude solutioins to systems of nonlinear wave equations with multiple speeds Osaka Journal of Mathematics, Vol.43 (No.2),pp.283-326 (Co-authored) 2006/06
Papers
「紀要その他」
A new proof of the global existence theorem of Klainerman for quasi-linear wave equations 三重大学教育学部紀要 57巻,pp.1-13 (Co-authored) 2006/03
Papers
A remark on the almost global existence theorem of Keel，Smith and Sogge Funkcialaj Ekvacioj, Vol.48 (No.1),pp.1-34 (Co-authored) 2005/04
Papers
Global existence of classical solutions to systems of nonlinear wave equations with different speeds of propagation Japanese Journal of Mathematics, Vol.27 (No.1),pp.113-202 (Co-authored) 2001/06
Papers
Global Existence of Classical Solutions to Systems of Wave Equations with Critical Nonlinearity in Three Space Dimensions Journal of the Mathematical Society of Japan, Vol.52 (No.3),pp.609-632 (Sole-authored) 2000/07
Papers
The Null Condition and Global Existence of Solutions of Systems of Wave Equations with Different Speeds * Vol.48,pp.43-86 (Co-authored) 1998/08