On Dirichlet Spaces With a Class of Superharmonic Weights

2018 ◽  
Vol 70 (4) ◽  
pp. 721-741 ◽  
Author(s):  
Guanlong Bao ◽  
Nihat Gokhan Göğüş ◽  
Stamatis Pouliasis
Keyword(s):  
Hardy Spaces ◽  
Carleson Measure ◽  
Reproducing Kernel ◽  
Boundary Behavior ◽  
Composition Operators ◽  
Open Unit ◽  
Dirichlet Spaces ◽  
Weighted Hardy Spaces ◽  
Borel Measures ◽  
Infinite Sum

AbstractIn this paper, we investigate Dirichlet spaces with superharmonic weights induced by positive Borel measures μ on the open unit disk. We establish the Alexander-Taylor-Ullman inequality for spaces and we characterize the cases where equality occurs. We define a class of weighted Hardy spaces via the balayage of the measure μ. We show that is equal to if and only if μ is a Carleson measure for . As an application, we obtain the reproducing kernel of when μ is an infinite sum of point-mass measures. We consider the boundary behavior and innerouter factorization of functions in . We also characterize the boundedness and compactness of composition operators on .

scholarly journals Weighted Composition Operators from Hardy Spaces into Logarithmic Bloch Spaces

2012 ◽  
Vol 2012 ◽  
pp. 1-20 ◽  
Author(s):  
Flavia Colonna ◽  
Songxiao Li
Keyword(s):  
Banach Space ◽  
Hardy Spaces ◽  
Composition Operators ◽  
Bloch Space ◽  
Weighted Composition Operator ◽  
Open Unit ◽  
Weighted Composition Operators ◽  
Open Unit Disk ◽  
Space Of Analytic Functions ◽  
Weighted Composition

The logarithmic Bloch spaceBlog⁡is the Banach space of analytic functions on the open unit disk&#x1D53B;whose elementsfsatisfy the condition∥f∥=sup⁡z∈&#x1D53B;(1-|z|2)log⁡  (2/(1-|z|2))|f'(z)|<∞. In this work we characterize the bounded and the compact weighted composition operators from the Hardy spaceHp(with1≤p≤∞) into the logarithmic Bloch space. We also provide boundedness and compactness criteria for the weighted composition operator mappingHpinto the little logarithmic Bloch space defined as the subspace ofBlog⁡consisting of the functionsfsuch thatlim⁡|z|→1(1-|z|2)log⁡  (2/(1-|z|2))|f'(z)|=0.

Angular Derivatives and Compact Composition Operators on the Hardy and Bergman Spaces

1986 ◽  
Vol 38 (4) ◽  
pp. 878-906 ◽  
Author(s):  
Barbara D. MacCluer ◽  
Joel H. Shapiro
Keyword(s):  
Holomorphic Function ◽  
Hardy Spaces ◽  
Composition Operators ◽  
Bergman Spaces ◽  
Open Unit ◽  
Angular Derivative ◽  
Restricted Class ◽  
Open Unit Disc ◽  
Angular Derivatives ◽  
Hardy And Bergman Spaces

Let U denote the open unit disc of the complex plane, and φ a holomorphic function taking U into itself. In this paper we study the linear composition operator Cφ defined by Cφf = f º φ for f holomorphic on U. Our goal is to determine, in terms of geometric properties of φ, when Cφ is a compact operator on the Hardy and Bergman spaces of φ. For Bergman spaces we solve the problem completely in terms of the angular derivative of φ, and for a slightly restricted class of φ (which includes the univalent ones) we obtain the same solution for the Hardy spaces Hp (0 < p < ∞). We are able to use these results to provide interesting new examples and to give unified explanations of some previously discovered phenomena.

Generalized composition operators on weighted Hardy spaces

2012 ◽  
Vol 218 (17) ◽  
pp. 8347-8352 ◽  
Author(s):  
Stevo Stević ◽  
Ajay K. Sharma
Keyword(s):  
Hardy Spaces ◽  
Composition Operators ◽  
Weighted Hardy Spaces

Two-Weight Norm Inequality and Carleson Measure in Weighted Hardy Spaces

1992 ◽  
Vol 44 (6) ◽  
pp. 1206-1219 ◽  
Author(s):  
Dangsheng Gu
Keyword(s):  
Homogeneous Space ◽  
Hardy Spaces ◽  
Maximal Operator ◽  
Carleson Measure ◽  
Norm Inequality ◽  
Doubling Measure ◽  
Weight Norm Inequality ◽  
Weighted Hardy Spaces

AbstractLet (X, ν, d) be a homogeneous space and let Ω be a doubling measure on X. We study the characterization of measures μ on X+ = X x R+ such that the inequality , where q < p, holds for the maximal operator Hvf studied by Hörmander. The solution utilizes the concept of the “balayée” of the measure μ.

Weighted Carleson Measure Spaces Associated with Different Homogeneities

2014 ◽  
Vol 66 (6) ◽  
pp. 1382-1412 ◽  
Author(s):  
Xinfeng Wu
Keyword(s):  
Hardy Spaces ◽  
Carleson Measure ◽  
Forthcoming Paper ◽  
Weighted Hardy Spaces ◽  
Dual Spaces ◽  
Measure Spaces

AbstractIn this paper, we introduce weighted Carleson measure spaces associated with different homogeneities and prove that these spaces are the dual spaces of weighted Hardy spaces studied in a forthcoming paper. As an application, we establish the boundedness of composition of two Calderón–Zygmund operators with different homogeneities on the weighted Carleson measure spaces; this, in particular, provides the weighted endpoint estimates for the operators studied by Phong–Stein.

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