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Publication date: 1986

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

spectrum constant coefficients essential spectrum relative compactness essential self-adjointness variable coefficients Elliptic operators linear partial differential operator quantum mechanical systems of particles

Mathematics Subject Classification ID

General topics in linear spectral theory for PDEs (35P05) General theory of partial differential operators (47F05) Selfadjoint operator theory in quantum theory, including spectral analysis (81Q10) Perturbations in context of PDEs (35B20) General theory of PDEs and systems of PDEs with constant coefficients (35E20) Research exposition (monographs, survey articles) pertaining to partial differential equations (35-02)

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