Results 21 to 30 of about 62,935 (305)

Product Type Operators Involving Radial Derivative Operator Acting between Some Analytic Function Spaces

Mathematics, 2021
Let N denote the set of all positive integers and N0=N∪{0}. For m∈N, let Bm={z∈Cm:|z|
Manisha Devi, Kuldip Raj, Mohammad Mursaleen   +2 more
doaj   +1 more source

A Novel Reliability Analysis Method for Fuzzy Multi-State Systems Considering Correlation

IEEE Access, 2019
Fuzzy multi-state systems (FMSSs) exist widely in practical engineering. It is usually difficult to evaluate the reliability of FMSSs because the reliability data is usually fuzzy due to the inaccuracy or imperfection of information, and there is often ...
Huiying Gao, Xiaoqiang Zhang
doaj   +1 more source

The Numerical Range of C*ψ Cφ and Cφ C*ψ

Concrete Operators, 2021
In this paper we investigate the numerical range of C*bφm Caφn and Caφn C*bφm on the Hardy space where φ is an inner function fixing the origin and a and b are points in the open unit disc.
Clifford John, Dabkowski Michael, Wiggins Alan   +2 more
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On the Nemytskii Operator in the Space of Functions of Bounded (p, 2, α)-Variation with Respect to the Weight Function

Demonstratio Mathematica, 2014
In this paper, we consider the Nemytskii operator (Hf)(t) = h(t, f(t)), generated by a given function h. It is shown that if H is globally Lipschitzian and maps the space of functions of bounded (p,2,α)-variation (with respect to a weight function α ...
Aziz Wadie
doaj   +1 more source

Bounded composition operator on Lorentz spaces

, 2020
We study composition operators on Lorentz spaces. In particular, we obtain necessary and sufficient conditions under which a measurable mapping induces a bounded composition operator.
Evseev N.A.
core   +2 more sources

An approach to elliptic equations with nonlinear gradient terms via a modulation framework

Bulletin of Mathematical Sciences, 2023
We consider a class of nonhomogeneous elliptic equations with fractional Laplacian and nonlinear gradient terms, namely [Formula: see text] in [Formula: see text], where [Formula: see text], [Formula: see text] is the nonlinearity, [Formula: see text ...
Lucas C. F. Ferreira, Wender S. Lagoin
doaj   +1 more source

Composite operators in QCD [PDF]

Nuclear Physics B, 1992
We give a formula for the derivatives of a correlation function of composite operators with respect to the parameters (i.e., the strong fine structure constant and the quark mass) of QCD in four-dimensional euclidean space. The formula is given as spatial integration of the operator conjugate to a parameter. The operator product of a composite operator
openaire   +2 more sources

2-Complex Symmetric Composition Operators on H²

Axioms, 2022
In this paper, we study 2-complex symmetric composition operators with the conjugation J, defined by Jf(z)=(f(z¯))¯, on the Hardy space H2. More precisely, we obtain the necessary and sufficient condition for the composition operator Cϕ to be 2-complex ...
Lian Hu, Songxiao Li, Rong Yang
doaj   +1 more source

Difference of composition operators on weighted Bergman spaces over the half-plane

Journal of Inequalities and Applications, 2016
Recently, the bounded, compact and Hilbert-Schmidt difference of composition operators on the Bergman spaces over the half-plane are characterized in (Choe et al. in Trans. Am. Math. Soc., 2016, in press).
Maocai Wang, Changbao Pang
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Spectra of Weighted Composition Operators with Quadratic Symbols

Concrete 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, Hodges Timothy, Kaschner Scott, McFarland Alexander, Thompson Derek   +4 more
doaj   +1 more source