Results 71 to 80 of about 528 (95)

Bloom-type two-weight inequalities for commutators of maximal functions

Analysis and Geometry in Metric Spaces
We study Bloom-type two-weight inequalities for commutators of the Hardy-Littlewood maximal function and sharp maximal function. Some necessary and sufficient conditions are given to characterize the two-weight inequalities for such commutators.
Zhang Pu, Fan Di
doaj   +1 more source

NONLINEAR JORDAN HIGHER DERIVATIONS ON TRIANGULAR RINGS

, 2014
Let T be a triangular ring. We say that a family of maps δ = {δn, δn : T → T , n ∈ N} is a Jordan higher derivable map (without assumption of additivity or continuity) if δn(AB + BA) = ∑ i+j=n [δi(A)δj(B) + δj(B)δi(A)] for all A,B ∈ T . In this paper, we
Chunhui Xue, Runling An, Huiyuan Zhang
semanticscholar   +1 more source

ωℒ{\omega }_{{\mathcal{ {\mathcal L} }}}-biprojective and ω¯\overline{\omega }-contractible Banach algebras

Demonstratio Mathematica
For a given Banach algebra ℳ{\mathcal{ {\mathcal M} }} and a continuous endomorphism ω\omega on ℳ{\mathcal{ {\mathcal M} }}, we define ℳ{\mathcal{ {\mathcal M} }} to be ωℒ{\omega }_{{\mathcal{ {\mathcal L} }}}-biprojective and ω¯\overline{\omega ...
Ghorbani Zahra
doaj   +1 more source

Upper triangular operator matrices, asymptotic intertwining and Browder, Weyl theorems

, 2013
Given a Banach space X, let MC∈B(X⊕X) denote the upper triangular operator matrix MC=(AC0B), and let δAB∈B(B(X)) denote the generalized derivation δAB(X)=AX−XB.
B. Duggal, I. Jeon, I. Kim
semanticscholar   +1 more source

Commutators for the maximal and sharp functions with weighted Lipschitz functions on weighted Morrey spaces

Demonstratio Mathematica
We study the boundedness of commutators of the Hardy-Littlewood maximal function and the sharp maximal function on weighted Morrey spaces when the symbols of the commutators belong to weighted Lipschitz spaces (weighted Morrey-Campanato spaces). Some new
Zhang Pu, Fan Di
doaj   +1 more source

A posteriori analysis of the spectral element discretization of heat equation

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014
In this paper, we present a posteriori analysis of the discretization of the heat equation by spectral element method. We apply Euler’s implicit scheme in time and spectral method in space.
Chorfi Nejmeddine, Abdelwahed Mohamed, Ben Omrane Ines   +2 more
doaj   +1 more source

Commuting of block dual Toeplitz operators

, 2014
In this paper, we characterize the commuting (semi-commuting) and the essentially commuting (semi-commuting) of block dual Toeplitz operators. Mathematics subject classification (2010): 47B35, 47B47.
Bo Zhang, Yufeng Lu
semanticscholar   +1 more source

A simulation algorithm for a single server retrial queuing system with batch arrivals

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2015
Many systems of real word are modeled by retrial queuing system with batch arrivals. Analytical formulas for this class of systems are complicated and address only particular cases.
Florea Ion, Nǎnǎu Corina-Ştefania
doaj   +1 more source

Dietary habits are associated with the prevalence of type 2 diabetes: a study among a middle eastern population. [PDF]

J Nutr Sci, 2022
Mahdi S, Mazidi M, Davies IG, Beigrezaei S, Mozaffari-Khosravi H, Mirzaei M, Lane KE, Khayyatzadeh SS.   +7 more
europepmc   +1 more source

Characterization of derivations on strongly double triangle subspace lattice algebras by local actions

Open Mathematics
Let D $\mathcal{D}$ be a strongly double triangle subspace lattice on a nonzero complex reflexive Banach space and AlgD $\text{Alg}\mathcal{D}$ the associated subspace lattice algebra. Assume that F,G∈AlgD $F,G\in \text{Alg}\mathcal{D}$ and set R(F,G)=
Qin Zijie
doaj   +1 more source