On equivariant extensions of a differential operator by the example of the Laplace operator in a circle

DOI10.1007/BF02513471zbMath0936.35049OpenAlexW2006520282MaRDI QIDQ4255313

Vladimir P. Burskii

Publication date: 10 August 1999

Published in: Ukrainian Mathematical Journal (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/bf02513471

zbMATH Keywords

boundary value problemgroup invariancecorrectness implies discreteness of the spectrum

Mathematics Subject Classification ID

General topics in linear spectral theory for PDEs (35P05) General theory of partial differential operators (47F05) Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation (35J05) Invariance and symmetry properties for PDEs on manifolds (58J70) Boundary value problems for linear higher-order PDEs (35G15)

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