A remark on the instability of eigenvalues of the Helmholtz equation
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Publication:1944291
zbMath1260.81088MaRDI QIDQ1944291
Publication date: 5 April 2013
Published in: Moscow University Physics Bulletin (Search for Journal in Brave)
General topics in linear spectral theory for PDEs (35P05) Selfadjoint operator theory in quantum theory, including spectral analysis (81Q10) Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation (35J05) Perturbations in context of PDEs (35B20)
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