arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1402.4953math.AP
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$p$ -Laplacian障碍问题的最优正则性

Optimal regularity for the obstacle problem for the $p$-Laplacian

John Andersson, Erik Lindgren, Henrik Shahgholian

摘要:

本文讨论了$p$ -Laplace算子的障碍问题。我们证明了解决方案的最优增长结果。特别令人感兴趣的是解在自由边界点处的逐点正则性。最令人惊讶的结果,我们证明是一个$p$障碍问题:找到最小的$u$,使$$ \hbox{div} (|\nabla u|^{p-2}\nabla u) \leq 0, \qquad u\geq ϕ, \qquad \hbox{in } B_1, $$与$ϕ\in C^{1,1}(B_1)$和给定的边界数据上$\partial B_1$。我们证明了解在自由边界点处是一致的$C^{1,1}$。在属于$L^\infty$的不均匀性的情况下获得类似的结果。当应用到相应的抛物型问题时,这些结果意味着任何解在时间上是Lipschitz是$C^{1,\frac{1}{p-1}}$在空间变量。

英文摘要:

In this paper we discuss the obstacle problem for the $p$-Laplace operator. We prove optimal growth results for the solution. Of particular interest is the point-wise regularity of the solution at free boundary points. The most surprising result we prove is the one for the $p$-obstacle problem: Find the smallest $u$ such that $$ \hbox{div} (|\nabla u|^{p-2}\nabla u) \leq 0, \qquad u\geq ϕ, \qquad \hbox{in } B_1, $$ with $ϕ\in C^{1,1}(B_1)$ and given boundary datum on $\partial B_1$. We prove that the solution is uniformly $C^{1,1}$ at free boundary points. Similar results are obtained in the case of an inhomogeneity belonging to $L^\infty$. When applied to the corresponding parabolic problem, these results imply that any solution which is Lipschitz in time is $C^{1,\frac{1}{p-1}}$ in the spatial variables.

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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