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首页> 外文期刊>Journal of the Mathematical Society of Japan >On global smooth solutions to the initial-boundary value problem for quasilinear wave equations in exterior domains
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On global smooth solutions to the initial-boundary value problem for quasilinear wave equations in exterior domains

机译:外域拟线性波动方程初边值问题的整体光滑解

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We consider the initial-boundary value problem for the standard quasi-linear wave equation: u_(tt) - div{σ(|▽u|~2)▽u} + a(x)u_t = 0 in Ω x [0, ∞) u(x,0) = u_0(x) and u,(x, 0) = u_1(x) and u|_(partial derivΩ) = 0 where Ω is an exterior domain in R~N, σ(υ) is a function like σ(υ) = 1/(1 + υ)~(1/2) and a(x) is a nonnegative function. Under two types of hypotheses on a(x) we prove existence theorems of global small amplitude solutions. We note that a(x)u_t is required to be effective only in localized area and no geometrical condition is imposed on the boundary partial derivΩ.
机译:我们考虑标准准线性波动方程的初边值问题:u_(tt)-div {σ(|▽u |〜2)▽u} + a(x)u_t = 0 inΩx [0, ∞)u(x,0)= u_0(x)且u,(x,0)= u_1(x)且u | _(偏导数Ω)= 0其中Ω是R〜N的外部域,σ(υ )是一个函数,例如σ(υ)= 1 /(1 +υ)〜(1/2),而a(x)是一个非负函数。在a(x)上的两种假设下,我们证明了整体小振幅解的存在性定理。我们注意到,仅要求a(x)u_t在局部区域有效,并且边界偏导数Ω没有施加任何几何条件。

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