Conditions of hyperbolicity of linear differentiable systems with constant multiplicity. (English) Zbl 1282.35230
Summary: Let \(h\) be a system with characteristics of constant multiplicity. We prove that if there exists an operator \(\mathcal A^\prime\) such that \(h\circ\mathcal A^\prime\) has diagonal principal part and admits a good decomposition, then \(h\) must satisfy the Levi conditions.
MSC:
| 35L45 | Initial value problems for first-order hyperbolic systems |
References:
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