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arXiv 2210.06360math.AP
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带小孔区域上多调和算子扰动特征值

Perturbed eigenvalues of polyharmonic operators in domains with small holes

Veronica Felli, Giulio Romani

AI总结:

本文研究带小孔区域上多调和算子特征值的奇异扰动,引入高阶容量概念刻画特征值渐近行为,并通过 blow-up 分析给出依赖于特征函数消失阶数的收敛速率。

摘要:

我们研究在有界区域上移除小的内部紧集时,多调和算子特征值的奇异扰动。我们考虑外部边界上同时具有齐次 Dirichlet 和 Navier 条件的情形,而在被移除集合的边界上施加齐次 Dirichlet 条件。为此,我们发展了一种适用于高阶情形的容量概念,并借此能够用被移除集合的容量以及相应归一化特征函数来描述受扰简单特征值的渐近行为。然后,在子集收缩到一个点的特殊情形下,我们应用 blow-up 分析来确定精确的收敛速率,该速率依赖于特征函数的消失阶数。在这方面,Hardy-Rellich 不等式在识别包含极限轮廓的适当函数空间时发挥了重要作用。值得注意的是,对于双调和算子,无论外部边界上规定何种边界条件,该函数空间都是相同的。

英文摘要:

We study singular perturbations of eigenvalues of the polyharmonic operator on bounded domains under removal of small interior compact sets. We consider both homogeneous Dirichlet and Navier conditions on the external boundary, while we impose homogeneous Dirichlet conditions on the boundary of the removed set. To this aim, we develop a notion of capacity which is suitable for our higher-order context, and which permits to obtain a description of the asymptotic behaviour of perturbed simple eigenvalues in terms of a capacity of the removed set, in dependence of the respective normalized eigenfunction. Then, in the particular case of a subset which is scaling to a point, we apply a blow-up analysis to detect the precise convergence rate, which turns out to depend on the order of vanishing of the eigenfunction. In this respect, an important role is played by Hardy-Rellich inequalities in order to identify the appropriate functional space containing the limiting profile. Remarkably, for the biharmonic operator this turns out to be the same, regardless of the boundary conditions prescribed on the exterior boundary.

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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