Abstract
The set of invertible elements in a quasi-Banach algebra is pseudo-convex. The spectrum of a holomorphic function taking values in a quasi-Banach algebra is an analytic multi-valued function.
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© 1988 Springer-Verlag Berlin Heidelberg
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Dilworth, S.J., Ransford, T.J. (1988). Spectra in quasi-Banach algebras. In: Odell, E.W., Rosenthal, H.P. (eds) Functional Analysis. Lecture Notes in Mathematics, vol 1332. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0081619
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DOI: https://doi.org/10.1007/BFb0081619
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