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arXiv 2208.03477math.AP
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关于系数与空间相关的wave equation:奇异性和低阶项

On the wave equation with space dependent coefficients: singularities and lower order terms

Marco Discacciati, Claudia Garetto, Costas Loizou

摘要:

本文是对\cite{DGL:22}中关于系数含时的间断系数波动方程的研究的补充。在这里,我们假设方程系数只取决于空间,我们制定Levi条件的低阶项,以保证存在一个非常弱解,定义在\cite{GR:14}。作为一个玩具模型,我们研究了具有间断速度的守恒型波动方程,并通过数值方法给出了相应的很弱解的定性分析。

英文摘要:

This paper complements the study of the wave equation with discontinuous coefficients initiated in \cite{DGL:22} in the case of time-dependent coefficients. Here we assume that the equation coefficients are depending on space only and we formulate Levi conditions on the lower order terms to guarantee the existence of a very weak solution as defined in \cite{GR:14}. As a toy model we study the wave equation in conservative form with discontinuous velocity and we provide a qualitative analysis of the corresponding very weak solution via numerical methods.

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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