Results 31 to 40 of about 131 (122)

The maximal operator in weighted variable spaces Lp(⋅)

open access: yesJournal of Function Spaces, Volume 5, Issue 3, Page 299-317, 2007., 2007
We study the boundedness of the maximal operator in the weighted spaces Lp(⋅)(ρ) over a bounded open set Ω in the Euclidean space ℝn or a Carleson curve Γ in a complex plane. The weight function may belong to a certain version of a general Muckenhoupt‐type condition, which is narrower than the expected Muckenhoupt condition for variable exponent, but ...
Vakhtang Kokilashvili   +3 more
wiley   +1 more source

Standard triangularization of semigroups of non-negative operators

open access: yes, 2004
CODEN: JFUAAW; MRCLASS: 47D03 (47A15 47B38 47B65); MRNUMBER: MR2108364 (2005m:47086); MRREVIEWER: Roman Drnov{\v{s}}ekSource type: Electronic ...
Heydar Radjavi, Gordon MacDonald
core   +1 more source

New proof of Nagnibida′s theorem

open access: yesJournal of Function Spaces, Volume 4, Issue 1, Page 85-90, 2006., 2006
Using the Duhamel product for holomorphic functions we give a new proof of Nagnibida’s theorem on unicellularity of integration operator Ja,(Jaf)(z)=?azf(t)dt, acting in the space Hol(O).
Mubariz T. Karaev, Nicolae Popa
wiley   +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

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

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

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

Commutants of the Square of Differentiation on the Half-Line [PDF]

open access: yes, 2012
MSC 2010: Primary: 447B37; Secondary: 47B38 ...
Hristov, Valentin, Dimovski, Ivan
core  

Hankel and Toeplitz Determinants for q‐Starlike Functions Involving a q‐Analog Integral Operator and q‐Exponential Function

open access: yesJournal of Function Spaces, Volume 2025, Issue 1, 2025.
This article investigates the upper bounds of the second Hankel and Toeplitz determinants for a family of q‐starlike functions defined by a q‐analog integral operator, which is a more general form of the q‐Srivastava‐Attiya operator, and the q‐exponential function eq(z).
Sarem H. Hadi   +3 more
wiley   +1 more source

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