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On closed boundary value problems for equations of mixed elliptic-hyperbolic type

✍ Scribed by Daniela Lupo; Cathleen S. Morawetz; Kevin R. Payne

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
220 KB
Volume
60
Category
Article
ISSN
0010-3640

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✦ Synopsis

Abstract

For partial differential equations of mixed elliptic‐hyperbolic type we prove results on existence and existence with uniqueness of weak solutions for closed boundary value problems of Dirichlet and mixed Dirichlet‐conormal types. Such problems are of interest for applications to transonic flow and are overdetermined for solutions with classical regularity. The method employed consists in variants of the a − b − c integral method of Friedrichs in Sobolev spaces with suitable weights. Particular attention is paid to the problem of attaining results with a minimum of restrictions on the boundary geometry and the form of the type change function. In addition, interior regularity results are also given in the important special case of the Tricomi equation. © 2006 Wiley Periodicals, Inc.

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