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arXiv 0908.2189math.AP
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一阶超双曲系统初边值问题的平滑解

Smoothing Solutions to Initial-Boundary Problems for First-Order Hyperbolic Systems

Irina Kmit

AI总结:

本文研究了一阶超双曲系统初边值问题的平滑解存在性,提出了一种判断解是否平滑的准则,并在经典边界条件下证明了平滑性结果。

摘要:

我们考虑一般线性一阶严格超双曲系统的初边值问题,包括局部或非局部非线性边界条件。虽然边界数据应为光滑的,但初始条件可以包含任意阶的奇异性分布。已知在初始数据连续的情况下,此类问题具有唯一的连续解。在强奇异初始数据的情况下,我们证明了delta波解的存在性。在两种情况下,我们说一个解是平滑的,如果它最终成为k次连续可微的。我们的主要结果是一个准则,允许我们确定解是否平滑。特别地,我们证明了在经典边界条件下的一般平滑性结果。

英文摘要:

We consider initial-boundary problems for general linear first-order strictly hyperbolic systems with local or nonlocal nonlinear boundary conditions. While boundary data are supposed to be smooth, initial conditions can contain distributions of any order of singularity. It is known that such problems have a unique continuous solution if the initial data are continuous. In the case of strongly singular initial data we prove the existence of a (unique) delta wave solution. In both cases, we say that a solution is smoothing if it eventually becomes $k$-times continuously differentiable for each $k$. Our main result is a criterion allowing us to determine whether or not the solution is smoothing. In particular, we prove a rather general smoothingness result in the case of classical boundary conditions.

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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