Abstract
We consider a class of linear higher order hyperbolic equations with a single degenerate point. We give sufficient conditions in order for the Cauchy problem to be well-posed in Gevrey classes and in the $C^\infty$ class.
Citation
Haruhisa Ishida. "Levi conditions to the Gevrey well-posedness for hyperbolic operators of higher order." J. Math. Kyoto Univ. 49 (1) 173 - 191, 2009. https://doi.org/10.1215/kjm/1248983035
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