Results 41 to 50 of about 4,469,777 (359)

Hermitian composition operators on Hardy-Smirnov spaces

open access: yesConcrete Operators, 2017
Let Ω be an open simply connected proper subset of the complex plane and φ an analytic self map of Ω. If f is in the Hardy-Smirnov space defined on Ω, then the operator that takes f to f º φ is a composition operator.
Gunatillake Gajath
doaj   +1 more source

A WEIGHTED COMPOSITION OPERATOR ON THE LOGARITHMIC BLOCH SPACE

open access: yes, 2010
We characterize the boundedness and compactness of the weighted composition operator on the logarithmic Bloch space LB = {f 2 H(D) : supD(1 i |z| 2 )ln( 2 1i|z| )|f 0 (z)| < +1} and the little loga- rithmic Bloch space LB0.
S. Ye
semanticscholar   +1 more source

Spectra of Weighted Composition Operators with Quadratic Symbols

open access: yesConcrete Operators, 2022
Previously, spectra of certain weighted composition operators W ѱ, φ on H2 were determined under one of two hypotheses: either φ converges under iteration to the Denjoy-Wolff point uniformly on all of 𝔻 rather than simply on compact subsets, or φ is ...
Doctor Jessica   +4 more
doaj   +1 more source

Approximation numbers of composition operators on Hp

open access: yesConcrete Operators, 2015
give estimates for the approximation numbers of composition operators on the Hp spaces, 1 ≤ p < ∞
Li Daniel   +2 more
doaj   +1 more source

Antinormal Weighted Composition Operators [PDF]

open access: yesAbstract and Applied Analysis, 2016
Letl2=L2N,μ, whereNis set of all positive integers andμis the counting measure whoseσ-algebra is the power set ofN. In this paper, we obtain necessary and sufficient conditions for a weighted composition operator to be antinormal on the Hilbert spacel2. We also determine a class of antinormal weighted composition operators on Hardy spaceH2D.
Dilip Kumar, Harish Chandra
openaire   +3 more sources

Composition-Differentiation Operator on the Bergman Space

open access: yesPan-American Journal of Mathematics, 2023
We investigate the properties of composition-differentiation operator Dψ on the Bergman space of the unit disk L2a(D). Specifically, we characterize the properties of the reproducing kernel for the derivatives of the Bergman space functions. Moreover, we
K. O. Aloo, J. O. Bonyo, I. Okello
doaj   +1 more source

Composition operator on $l\sp{p}$ and its adjoint

open access: yes, 1978
A necessary and sufficient condition for the invertibility of a composition operator C. on iP is reported in this paper. The adjoint of C, is computed in the case p = 2.
R. K. Singh, B. Komal
semanticscholar   +1 more source

Similarity to an isometry of a composition operator

open access: bronze, 2002
We study the composition operators which are similar to an isometry on the classical Hardy space H 2 (D).
Frédéric Bayart
openalex   +2 more sources

Slice regular composition operators [PDF]

open access: yesComplex Variables and Elliptic Equations, 2015
In the article the class of slice regular functions is shown to be closed under a new regular composition. The new regular composition turns out to be globally defined in contrast to the locally defined version by Vlacci. Its advantage over Vlacci's is demonstrated by its associated theory of composition operators and dynamical systems for slice ...
Xieping Wang, Guangbin Ren
openaire   +3 more sources

Jan Stochel, a stellar mathematician [PDF]

open access: yesOpuscula Mathematica
The occasion for this survey article was the 70th birthday of Jan Stochel, professor at Jagiellonian University, former head of the Chair of Functional Analysis and a prominent member of the Kraków school of operator theory.
Sameer Chavan   +4 more
doaj   +1 more source

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