On the Essential Spectrum of Second Order Degenerate Elliptic Operators

DOI10.1112/JLMS/S2-8.3.463zbMath0288.35047OpenAlexW2163193969MaRDI QIDQ4776302

W. Desmond Evans

Publication date: 1974

Published in: Journal of the London Mathematical Society (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1112/jlms/s2-8.3.463

Mathematics Subject Classification ID

Boundary value problems for second-order elliptic equations (35J25) General topics in linear spectral theory for PDEs (35P05) General theory of partial differential operators (47F05)

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5.—Semi-bounded Dirichlet Integrals and the Invariance of the Essential Spectra of Self-adjoint Operators ⋮ A critically degenerate elliptic Dirichlet problem, spectral theory and bifurcation

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