Author:
Grobler J. J.,Raubenheimer H.
Abstract
Let A be a Banach algebra with unit 1 and let B be a Banach algebra which is a subalgebra of A and which contains 1. In [5]Barnes gave sufficient conditions for B to be inverse closed in A. In this paper we consider single elements and study the question of how the spectrum relative to B of an element in B relates to the spectrum of the element relative to A.
Publisher
Cambridge University Press (CUP)
Cited by
20 articles.
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