Asymptotics of eigenvalues of the Dirichlet problem in a skewed $\mathcal{T}$-shaped waveguide
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 54 (2014) no. 5, pp. 793-814 Cet article a éte moissonné depuis la source Math-Net.Ru

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Asymptotics are constructed and justified for the eigenvalues of the Dirichlet problem for the Laplacian in a waveguide consisting of a unit strip and a semi-infinite strip joined at a small angle $\varepsilon\in(0,\pi/2)$. Some properties of the discrete spectrum are established, and open questions are stated.
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S. A. Nazarov. Asymptotics of eigenvalues of the Dirichlet problem in a skewed $\mathcal{T}$-shaped waveguide. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 54 (2014) no. 5, pp. 793-814. http://geodesic.mathdoc.fr/item/ZVMMF_2014_54_5_a7/

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