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Abstract
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We study the ill-posedness of a quasilinear wave equation. It was shown by Smith and Tataru in 2005
that for any
(or
in our situation), the
equation is well-posed in
.
We show a sharpness result by exhibiting a quasilinear wave equation
and an initial data such that the Cauchy problem is ill-posed for in
.
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Keywords
PDE, quasilinear wave, wave equation, ill-posedness,
well-posedness, Sobolev spaces, analysis, fractional
derivatives
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Mathematical Subject Classification
Primary: 35A01, 35A30, 35L05
Secondary: 35A21, 35D30
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Milestones
Received: 30 July 2021
Revised: 14 January 2023
Accepted: 12 March 2023
Published: 24 August 2023
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Publishers). |
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