Perturbations by quadratic forms and invariance of essential spectra

DOI10.1007/BF01181699zbMath0514.47011MaRDI QIDQ1051232

Rainer Hempel

Publication date: 1984

Published in: Mathematische Zeitschrift (Search for Journal in Brave)

Full work available at URL: https://eudml.org/doc/173402

zbMATH Keywords

relative compactnesssmall perturbationelliptic regularizationinvariance of essential spectra

Mathematics Subject Classification ID

Spectrum, resolvent (47A10) Perturbation theory of linear operators (47A55)

Cites Work

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• Stability of Schrödinger eigenvalue problems
• Periodic Schrödinger operators with (non-periodic) magnetic and electric potentials
• On Enss' approach to scattering theory
• Self-adjoint operators
• Phase space analysis of simple scattering systems: extensions of some work of Enss
• On the essential spectrum of an arbitrary operator. I
• On the invariance of the essential spectrum of an arbitrary operator. II
• On the essential spectrum
• Schrödinger operators with singular magnetic vector potentials

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