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arXiv 1906.04754math.AP
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多孔介质方程沿零水平集的正则性改进

Improved regularity for the porous medium equation along zero level-sets

Edgard A Pimentel, Makson S. Santos

摘要:

在目前的工作中,我们建立了尖锐的正则性估计的多孔介质方程的解决方案,沿其零水平集。我们的工作下,一个接近政权的指数管理的非线性问题。然后,我们证明了解是局部的类$\mathcal{C}^{1-,\frac{1}{2}-}$沿自由边界点$x_0\in \partial\left\lbrace u>0\right\rbrace$,无论是在时间和空间。我们的论点包括进口信息从热方程,通过近似和本地化的方法。

英文摘要:

In the present work we establish sharp regularity estimates for the solutions of the porous medium equation, along their zero level-sets. We work under a proximity regime on the exponent governing the nonlinearity of the problem. Then, we prove that solutions are locally of class $\mathcal{C}^{1-,\frac{1}{2}-}$ along free boundary points $x_0\in \partial\left\lbrace u>0\right\rbrace$, both in time and space. Our argument consists of importing information from the heat equation, through approximation and localization 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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