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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Integral Equations a...arrow_drop_down
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Integral Equations and Operator Theory
Article . 1991 . Peer-reviewed
License: Springer TDM
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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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Duality and multiplication operators

Authors: Shunhua Sun; Pratibha G. Ghatage;

Duality and multiplication operators

Abstract

Let \(\mathbb{D}\) denote the open unit disk and let \(dA\) denote the normalized Lebesgue measure on \(\mathbb{D}\). The Bergman space is defined by \({\mathcal L}_ a^ p=\{f\); \(f:\mathbb{D}\to\mathbb{C}\), \(f\) analytic and \(\int_ D| f(z)|^ 2 dA(z)<\infty\}\). The maximum ideal space of the Banach algebra of bounded analytic functions on \(\mathbb{D}\) is denoted by \({\mathcal M}\). Let \({\mathcal U}\) be the algebra of functions on \(\mathbb{D}\) which can be extended continuously to \({\mathcal M}\) and let \(G\) be the union of all non- trivial Gleason parts of \({\mathcal M}\setminus\mathbb{D}\). A space of functions contained in \({\mathcal L}^ \infty(\mathbb{D})\cap C(\mathbb{D}\cup G)\), but not necessarily in \({\mathcal U}\), is considered. The paper gives a representation of these functions as bounded multiplication operators on \({\mathcal L}_ a^ 2\) and identifies the subspace consisting of functions which induce compact multiplication operators.

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Keywords

maximum ideal space, Banach algebra of bounded analytic functions, bounded multiplication operators, normalized Lebesgue measure, Banach algebras of differentiable or analytic functions, \(H^p\)-spaces, non-trivial Gleason parts, Linear operators on function spaces (general), Bergman space

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
4
Average
Average
Average
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