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- W3134604048 abstract "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 Vainikko (1979). The convergence of eigenfunctions can be expressed in terms of the H1 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." @default.
- W3134604048 created "2021-03-15" @default.
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- W3134604048 date "2022-09-01" @default.
- W3134604048 modified "2023-09-30" @default.
- W3134604048 title "Spectral stability of the Steklov problem" @default.
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- W3134604048 doi "https://doi.org/10.1016/j.na.2022.112989" @default.
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