Grigor’eva, N. S. Asymptotic behaviour of quasi-eigenvalues of the Laplace operator in the case of the outside of a circular disc. (English) Zbl 0444.35063 U.S.S.R. Comput. Math. Math. Phys. 19, No. 5, 131-141 (1980). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 35P20 Asymptotic distributions of eigenvalues in context of PDEs 35J05 Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation 78A45 Diffraction, scattering Keywords:asymptotic behaviour of quasi-eigenvalues; Laplace operator PDF BibTeX XML Cite \textit{N. S. Grigor'eva}, U.S.S.R. Comput. Math. Math. Phys. 19, No. 5, 131--141 (1980; Zbl 0444.35063) Full Text: DOI