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math.AP2015
On the Gevrey strong hyperbolicity
Tatsuo Nishitani
In this paper we are concerned with a homogeneous differential operator of order of which characteristic set of order is assumed to be a smooth manifold. We define the…
math.AP2015★ 1 cited
Weakly Hyperbolic Systems by Symmetrization
F. Colombini, T. Nishitani, J. Rauch
We study hyperbolic first order systems and propose a new method proving Gevrey well posedness, constructing a symmetrizer, motivated by a special Lyapunov function for linear ODE.…