Precise finite speed and uniqueness in the Cauchy problem for symmetrizable hyperbolic systems
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Abstract:
Precise finite speed, in the sense of the domain of influence being a subset of the union of influence curves through the support of the initial data, is proved for hyperbolic systems symmetrized by pseudodifferential operators in the spatial variables. From this, uniqueness in the Cauchy problem at spacelike hypersurfaces is derived by a Hölmgren style duality argument. Sharp finite speed is derived from an estimate for propagation in each direction. Propagation in a fixed direction is proved by regularizing the problem in the orthogonal directions. Uniform estimates for the regularized equations are proved using pseudodifferential techniques of Beals-Fefferman type.References
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Additional Information
- Jeffrey Rauch
- Affiliation: Department of Mathematics, University of Michigan, Ann Arbor, Michigan 48109
- Email: rauch@umich.edu
- Received by editor(s): July 2, 2008
- Published electronically: October 21, 2010
- Additional Notes: This research was partially supported by the National Science Foundation under grant NSF DMS 0405899
- © Copyright 2010 American Mathematical Society
- Journal: Trans. Amer. Math. Soc. 363 (2011), 1161-1182
- MSC (2000): Primary 35L45; Secondary 35S10
- DOI: https://doi.org/10.1090/S0002-9947-2010-05047-0
- MathSciNet review: 2737261