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arXiv 1111.2801math.AP
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几何型Sobolev不等式及其对极小元正则性的应用

Geometric-type Sobolev inequalities and applications to the regularity of minimizers

Xavier Cabre, Manel Sanchon

摘要:

本文件有两个目的。我们首先证明了一个加权Sobolev不等式和一个加权Morrey不等式的一部分,其中的权重是出现在不等式中的函数的水平集的平均曲率的幂。然后,作为不等式的主要应用,我们建立了$\mathbb{R}^n$的有界区域$Ω$中$-Δu=g(u)$的半稳定解的新的$L^q$和$W^{1,q}$估计。当$n\geq 5$和区域是凸的时,这些估计导致$-Δu=λf(u)$的极值解的$L^{2n/(n-4)}(Ω)$界.我们记得,极值解已知是有界的凸域,如果$n\leq 4$,他们的有界性是预期的-但仍然未知-为$n\leq 9$。

英文摘要:

The purpose of this paper is twofold. We first prove a weighted Sobolev inequality and part of a weighted Morrey's inequality, where the weights are a power of the mean curvature of the level sets of the function appearing in the inequalities. Then, as main application of our inequalities, we establish new $L^q$ and $W^{1,q}$ estimates for semi-stable solutions of $-Δu=g(u)$ in a bounded domain $Ω$ of $\mathbb{R}^n$. These estimates lead to an $L^{2n/(n-4)}(Ω)$ bound for the extremal solution of $-Δu=λf(u)$ when $n\geq 5$ and the domain is convex. We recall that extremal solutions are known to be bounded in convex domains if $n\leq 4$, and that their boundedness is expected ---but still unkwown--- for $n\leq 9$.

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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