Results 41 to 50 of about 1,122 (122)

Generalized Stević-Sharma operators from the minimal Möbius invariant space into Bloch-type spaces

open access: yesDemonstratio Mathematica, 2023
The aim of this study is to investigate the boundedness, essential norm, and compactness of generalized Stević-Sharma operator from the minimal Möbius invariant space into Bloch-type space.
Guo Zhitao
doaj   +1 more source

Chaotic operators on hypergroups

open access: yes, 2018
In this paper, we initiate a study of chaos, in the sense of Devaney, and topological transitivity on the Lp space of hypergroups, and give some sufficient and necessary conditions for weighted translation operators on hypergroups to be chaotic and ...
Chung-chuan Chen, S. Tabatabaie
semanticscholar   +1 more source

Characterization of Riesz and Bessel potentials on variable Lebesgue spaces

open access: yesJournal of Function Spaces, Volume 4, Issue 2, Page 113-144, 2006., 2006
Riesz and Bessel potential spaces are studied within the framework of the Lebesgue spaces with variable exponent. It is shown that the spaces of these potentials can be characterized in terms of convergence of hypersingular integrals, if one assumes that the exponent satisfies natural regularity conditions. As a consequence of this characterization, we
Alexandre Almeida   +2 more
wiley   +1 more source

A note on two‐weight inequalities for multiple Hardy‐type operators

open access: yesJournal of Function Spaces, Volume 3, Issue 3, Page 223-237, 2005., 2005
Necessary and sufficient conditions on a pair of weights guaranteeing two‐weight estimates for the multiple Riemann‐Liouville transforms are established provided that the weight on the right‐hand side satisfies some additional conditions.
Alexander Meskhi, Vakhtang Kokilashvili
wiley   +1 more source

A note on bi-contractive projections on spaces of vector valued continuous functions

open access: yesConcrete Operators, 2018
This paper concerns the analysis of the structure of bi-contractive projections on spaces of vector valued continuous functions and presents results that extend the characterization of bi-contractive projections given by the first author.
Botelho Fernanda, Rao T.S.S.R.K.
doaj   +1 more source

Products of radial derivative and weighted composition operators from weighted Bergman-Orlicz spaces to weighted-type spaces

open access: yes, 2018
Let H(Bn) be the space of all holomorphic functions on the unit ball Bn of Cn , φ a holomorphic self-map of Bn , u∈H(Bn) , and R the radial derivative operator on H(Bn) . Two operators on H(Bn) are defined by RWu,φ f (z)=R(u(z) f (φ(z))) and Wu,φ R f (z)=
Z. Jiang, Xiao-Feng Wang
semanticscholar   +1 more source

Norm-Controlled Inversion of Banach algebras of infinite matrices

open access: yes, 2020
In this paper we provide a polynomial norm-controlled inversion of Baskakov–Gohberg–Sjöstrand Banach algebra in a Banach algebra B(`q ), 1 ≤ q ≤∞, which is not a symmetric ∗− Banach algebra. 2020 Mathematics Subject Classification.
Qiquan Fang, C. Shin
semanticscholar   +1 more source

Lyapunov theorems for Banach spaces

open access: yes, 1993
We present a spectral mapping theorem for semigroups on any Banach space $E$. From this, we obtain a characterization of exponential dichotomy for nonautonomous differential equations for $E$-valued functions.
Latushkin, Yuri   +1 more
core   +4 more sources

Extension of Zhu′s solution to Lotto′s conjecture on the weighted Bergman spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 41, Page 2199-2203, 2004., 2004
We reformulate Lotto′s conjecture on the weighted Bergman space Aα2 setting and extend Zhu′s solution (on the Hardy space H2) to the space Aα2.
Abebaw Tadesse
wiley   +1 more source

Moore-Penrose inverse of conditional type operators

open access: yes, 2017
We prove some basic results on some Moore-Penrose inverse of conditional type operators on L2(Σ) . For instance, we show, among other results, that a weighted conditional operator T = MwEMu is centered if and only if T † , the Moore-Penrose inverse of T ,
M. Jabbarzadeh, M. Chegeni
semanticscholar   +1 more source

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