49R05
- : On the spectrum of Robin Laplacian in a planar waveguide. (English). Czechoslovak Mathematical Journal, vol. 69 (2019), issue 2, pp. 485-501
- : Spectrum of the Laplacian in narrow tubular neighbourhoods of hypersurfaces with combined Dirichlet and Neumann boundary conditions. (English). Mathematica Bohemica, vol. 139 (2014), issue 2, pp. 185-193
- : Variational characterization of eigenvalues of a non-symmetric eigenvalue problem governing elastoacoustic vibrations. (English). Applications of Mathematics, vol. 59 (2014), issue 1, pp. 1-13
- : Isoperimetric estimates for the first eigenvalue of the $p$-Laplace operator and the Cheeger constant. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 44 (2003), issue 4, pp. 659-667
- : A unified optimality condition for eigenvalue problems. (English). Kybernetika, vol. 29 (1993), issue 3, pp. 249-255
- : Some functions of eigenvalues of normal operator. (English). Aplikace matematiky, vol. 35 (1990), issue 5, pp. 356-360
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