Abstract
We study the wellposedness in the Gevrey classes $\gamma^{s}$ and in $C^{\infty}$ of the Cauchy problem for 2 by 2 weakly hyperbolic systems. In this paper we shall give some conditions to the case that the characteristic roots oscillate rapidly and vanish at an infinite number of points.
Citation
Piero D'Ancona. Tamotu Kinoshita. Sergio Spagnolo. "On the 2 by 2 weakly hyperbolic systems." Osaka J. Math. 45 (4) 921 - 939, December 2008.
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