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Transactions of the American Mathematical Society
Transactions of the American Mathematical Society
ISSN 1088-6850(online) ISSN 0002-9947(print)


On the regularity of the Riemann function for hyperbolic equations

Author: William L. Goodhue
Journal: Trans. Amer. Math. Soc. 175 (1973), 483-490
MSC: Primary 35L55
MathSciNet review: 0318685
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Abstract: In an earlier paper, A. Friedman demonstrated that the Riemann function for a strictly hyperbolic system with Gevrey coefficients was locally Gevrey of some higher order except along the bicharacteristics. By representing the Riemann function in terms of a progressing wave expansion, this result is extended beyond caustics.

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Additional Information

PII: S 0002-9947(1973)0318685-5
Keywords: Riemann function, strictly hyperbolic systems, progressing wave expansion, Gevrey class
Article copyright: © Copyright 1973 American Mathematical Society

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