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arXiv 1010.4341math.APmath-phmath.MP
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不定常非均匀介质中非线性wave equations的整体解

Global solutions of nonlinear wave equations in time dependent inhomogeneous media

Shiwu Yang

摘要:

研究了Lorentz背景$(\mathbb{R}^{3+1}, g)$上一类具零条件的半线性波动方程的小数据整体解的存在性问题,其中\textbf{time dependent metric $g$}在柱体$\{(t, x)| |x|\leq R\}$外与Minkowski度量一致.我们表明,小数据的整体存在性结果可以减少到两个集成的本地能量估计,并证明这些估计在特定的情况下,$g$仅仅是$C^1$接近Minkowski度量。这项工作的一个新颖的方面是,它适用于不解决任何特定的固定度量的背景方程。

英文摘要:

We consider the problem of small data global existence for a class of semilinear wave equations with null condition on a Lorentzian background $(\mathbb{R}^{3+1}, g)$ with a \textbf{time dependent metric $g$} coinciding with Minkowski metric outside the cylinder $\{(t, x)| |x|\leq R\}$. We show that the small data global existence result can be reduced to two integrated local energy estimates and demonstrate these estimates in the particular case when $g$ is merely $C^1$ close to the Minkowski metric. One of the novel aspects of this work is that it applies to equations on backgrounds which do not settle to any particular stationary metric.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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