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arXiv 2103.04991math.AP
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Steklov问题的谱稳定性

Spectral stability of the Steklov problem

Alberto Ferrero, Pier Domenico Lamberti

摘要:

本文研究了经典Steklov问题的谱在区域扰动下的稳定性。我们找到的条件,保证谱稳定性,我们表明他们的最优性。我们强调的事实是,我们的谱稳定性的结果也涉及在适当的意义下,根据\cite{Vainikko}的连接系统的定义的本征函数的收敛。本征函数的收敛性可用$H^1$强收敛性来表示。在我们的证明中使用的参数是基于一个适当的定义紧收敛的预解算子与Steklov问题的不同领域。为了表明我们的条件的最优性,我们提出了替代的假设,引起退化的频谱或频谱的不连续性的意义上说,特征值收敛到特征值的极限问题,这并不符合Steklov问题的限制域。

英文摘要:

This paper investigates the stability properties of the spectrum of the classical Steklov problem under domain perturbation. We find conditions which guarantee the spectral stability and we show their optimality. We emphasize the fact that our spectral stability results also involve convergence of eigenfunctions in a suitable sense according with the definition of connecting system by \cite{Vainikko}. The convergence of eigenfunctions can be expressed in terms of the $H^1$ strong convergence. The arguments used in our proofs are based on an appropriate definition of compact convergence of the resolvent operators associated with the Steklov problems on varying domains. In order to show the optimality of our conditions we present alternative assumptions which give rise to a degeneration of the spectrum or to a discontinuity of the spectrum in the sense that the eigenvalues converge to the eigenvalues of a limit problem which does not coincide with the Steklov problem on the limiting domain.

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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