Generalised Spectra and Analytic Multivalued Functions

DOI10.1112/jlms/s2-29.2.306zbMath0508.46036OpenAlexW2039779271MaRDI QIDQ4746309

Thomas Ransford

Publication date: 1984

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

Full work available at URL: https://doi.org/10.1112/jlms/s2-29.2.306

zbMATH Keywords

numerical rangespectrumessential spectrumpseudoconvexWeyl spectrumanalytic multivalued functionleft spectrumgeneralised spectraBeurling-Gelfand spectral radius formulaJohnson's uniqueness-of-norm theoremNewburgh's continuity theoremupper semicontinuous set-valued function

Mathematics Subject Classification ID

Spectrum, resolvent (47A10) Topological algebras, normed rings and algebras, Banach algebras (46H99)

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