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Acta Mathematica Sinica English Series
Article . 2001 . Peer-reviewed
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Article . 2001
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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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Acta Mathematica Sinica
Article . 2001 . Peer-reviewed
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Multipliers on Dirichlet Type Spaces

Multipliers on Dirichlet type spaces
Authors: Hu, Peng Yan; Shi, Ji Huai;

Multipliers on Dirichlet Type Spaces

Abstract

The authors consider the weighted Dirichlet space \({\mathcal D}_\tau \) of the unit ball in \({\mathbb C}^n \). These spaces include the classical Dirichlet space (\(\tau=1 \)), the Hardy space (\(\tau=0 \)), and the Bergman space (\(\tau=-1 \)), and are defined in the paper in the standard way via their Taylor coefficients. A complex-valued function \(\phi \) defined on the unit ball is said to be a pointwise multiplier (or simply a multiplier) from \({\mathcal D}_\tau \) to \({\mathcal D}_\mu \) if \( f \in {\mathcal D}_\mu \) whenever \(f\in {\mathcal D}_\tau \). The multipliers between function spaces have been studied by a number of authors. In the case of Dirichlet type spaces, we refer the reader to the papers by \textit{D. Stegenga} [Ill. J. Math. 24, 113-139 (1980; Zbl 0432.30016)] and \textit{R. Kerman} and \textit{E. Sawyer} [Trans. Am. Math. Soc. 309, 87-98 (1988; Zbl 0657.31019)], for example, where this concept was studied from the viewpoint of Carleson measures (there are also several related papers by Axler, Shields, and others). In the paper under review, the authors obtain complete characterizations of the multipliers from \({\mathcal D}_\tau \) into \({\mathcal D}_\mu \) for a certain range of indices, thus generalizing the known facts about the functions of one complex variable. In other cases, they construct explicit examples showing that functions in certain spaces cannot be multipliers. Their proofs are based on the Cauchy-Schwarz inequality, Stirlings formula, and manipulations of power series. The References contain several misprints.

Related Organizations
Keywords

Dirchlet type spaces, Dirichlet type spaces, holomorphic function, Linear operators on function spaces (general), pointwise multiplier, Other spaces of holomorphic functions of several complex variables (e.g., bounded mean oscillation (BMOA), vanishing mean oscillation (VMOA)), pointwise multipliers

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selected citations
These citations are derived from selected sources.
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!
16
Top 10%
Top 10%
Top 10%
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