Research field (2)：
Mathematical analysis
, Basic analysis
Research keywords (10)：
漸近解析
, 振動理論
, 適切性
, 初期値問題
, 微分方程式
, asymptotic analysis
, oscillation theory
, well-posedness
, Cauchy problem
, differential equations
Research theme for competitive and other funds (8)：
2012 - 対角化による双曲型方程式の解のエネルギー評価法
2012 - Energy estimates for solutions of hyperbolic equations via refined diagonalizations
2007 - 退化双曲型方程式に対する振動理論
2007 - Oscillation Theory for Degenerate Hyperbolic Equations
非線形弱双曲型方程式に対する大域可解性
弱双曲型方程式に対する初期値問題の適切性
Global solvability for nonlinear weakly hyperbolic equations
Well-posedness of the Cauchy problem for weakly hyperbolic equations
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Papers (7)：
Fumihiko Hirosawa, Haruhisa Ishida. On second order weakly hyperbolic equations and the ultradifferentiable classes. Journal of Differential Equations. 2013. 255. 7. 1437-1468
Haruhisa Ishida, Hyung Ju Lee. On asymptotic behaviour of solutions to linear differential systems with variable coeffcients via characteristic numbers. Funkcialaj Ekvacioj. 2010. 53. 3. 359-379
Haruhisa Ishida, Yasuo Yuzawa. Oscillatory properties for semilinear degenerate hyperbolic equations of second order. Journal of Mathematical Analysis and Applications. 2009. 356. 2. 624-632
Haruhisa Ishida. Levi conditions to the gevrey well-posedness for hyperbolic operators of higher order. Kyoto Journal of Mathematics. 2009. 49. 1. 173-191
Ferruccio Colombini, Haruhisa Ishida. Well-posedness of the cauchy problem in gevrey classes for some weakly hyperbolic equations of higher order. Journal d'Analyse Mathematique. 2003. 90. 13-25
