Differential and Integral Equations

Local regularity of non-resonant nonlinear wave equations

Kimitoshi Tsutaya

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We study the problem of minimal regularity required to ensure local well-posedness for systems of nonlinear wave equations with different propagation speeds in three space dimensions $$ \begin{align} (\partial_t^2 -C_1^2\Delta)u &= F(u,v,\partial u,\partial v), \\ (\partial_t^2 -C_2^2\Delta)v &= G(u,v,\partial u,\partial v). \end{align} $$ We prove that if $C_2 > C_1$ and $F$, $G$ have the form $\p u \cdot v$, then the problem is well-posed in $H^1$. Our proof is based on the same type of space-time estimates as those of Klainerman and Machedon.

Article information

Differential Integral Equations, Volume 11, Number 2 (1998), 279-292.

First available in Project Euclid: 30 April 2013

Permanent link to this document

Mathematical Reviews number (MathSciNet)

Zentralblatt MATH identifier

Primary: 35L70: Nonlinear second-order hyperbolic equations


Tsutaya, Kimitoshi. Local regularity of non-resonant nonlinear wave equations. Differential Integral Equations 11 (1998), no. 2, 279--292. https://projecteuclid.org/euclid.die/1367341071

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