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A Characterization of a Sparse Blaschke Product
Published online by Cambridge University Press: 20 November 2018
Abstract
We give a characterization of a sparse Blaschke product b in terms of the separation of support sets of its zeros in M(H∞ + C) and the structure of the nonanalytic points. We use this characterization to give a sufficient condition on an interpolating Blaschke product q to have the following property: there exists a non trivial Gleason part P on which q is nonzero and less than one.
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- Research Article
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- Copyright © Canadian Mathematical Society 1989
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