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Abstract: We consider a Dirichlet spectral problem for a second order differential operator, with piecewise constant coefficients, in a domain [Omega] in the plane R2. Here [ ], where [Omega] is a fixed bounded domain with boundary , is a curvilinear band of width O(epsilon), and . The density and stiffness constants are of order mt and t respectively in this band, while they are of order 1 in ; t1, m>2, and is a small positive parameter. We address the asymptotic behavior, as 0, for the eigenvalues and the corresponding eigenfunctions. In particular, we show certain localization effects for eigenfunctions associated with low frequencies. This is deeply involved with the extrema of the curvature of
Fuente: Journal of differential equations Volume , 2021, 270, 1160-1195
Publisher: Elsevier
Publication date: 01/01/2021
No. of pages: 36
Publication type: Article
DOI: 10.1016/j.jde.2020.09.011
ISSN: 1090-2732,0022-0396
Spanish project: PGC2018-098178-B-I00
Publication Url: https://doi.org/10.1016/j.jde.2020.09.011
Consult in UCrea Read publication
DELFINA GOMEZ GANDARILLAS
NAZAROV, SERGEI A.
MARIA EUGENIA PEREZ MARTINEZ
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