Results 261 to 270 of about 14,600 (287)

On the Composition and Decomposition of Positive Linear Operators (V)

Results in Mathematics, 2010
This note discusses the indecomposability and decomposability of certain operators occurring frequently in approximation theory: piecewise linear interpolation and Bernsteintype operators. The second topic includes the central (absolute) moments of the composition of two operators and their asymptotic behavior.
Heiner Gonska, Ioan Raşa
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Linear Fractional Composition Operators Over the Half-Plane

Integral Equations and Operator Theory, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Boo Rim Choe, Hyungwoon Koo, Wayne Smith
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Linear fractional composition operators on H2

Integral Equations and Operator Theory, 1988
Let \(\phi\) be an analytic function mapping the unit disk D into itself. The composition operator \(C_{\phi}\) on \(H_ 2\) is defined by \(C_{\phi}f=f\circ \phi\). In this paper the author studies such composition operators when \(\phi\) is a linear fractional transformation.
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Composition of linear canonical Hankel pseudo-differential operators

Asian-European Journal of Mathematics, 2023
In this paper, the study of linear canonical Hankel pseudo-differential operators has been extended to Sobolev-type spaces. Two versions of pseudo-differential operators involving linear canonical Hankel transformation are defined. We have shown that the pseudo-differential operators and composition of pseudo-differential operators are bounded in ...
Ujjawala Singh, Tanuj Kumar
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Linear combination of derivative weighted composition operators

Transactions of Tianjin University, 2012
The relation between composition operators on the Dirichlet spaces in the open unit disk and derivative weighted composition operators on the Bergman spaces in the open unit disk is investigated firstly, and for a combination of several derivative weighted composition operators which acts on classic Bergman space, the lower bound of its essential norm ...
Cezhong Tong, Ligang Geng
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Complete continuity of linear combinations of composition operators

Archiv der Mathematik, 2010
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Nguyen Quang Dieu, Ohno, Shûichi
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Regularizability of inverse operators of linear injections and their compositions

Siberian Mathematical Journal, 1988
See the review in Zbl 0658.47004.
Domanskij, E. N., Ostrovskij, M. I.
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Joint hyponormality of composition operators with linear fractional symbols

Integral Equations and Operator Theory, 2002
Continuing the work of Cowen and Kriete, the author studies joint hyponormality and joint subnormality of \(n\)-tuples of commuting composition operators with linear fractional symbols, acting on the Hardy space \(H^2\). He presents conditions to ensure that an \(n\)-tuple is jointly subnormal if and only if it is jointly hyponormal.
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Linear-Fractional Composition Operators in Several Variables

Integral Equations and Operator Theory, 2005
We investigate properties of linear-fractional composition operators Cφ on Hardy and Bergman spaces of the ball in \(\mathbb{C}^N \) that are motivated by a formula for the self-commutator [Cφ* ,Cφ]. In particular, we characterize when certain commutators [Cφ, Cσ] are compact, and give conditions under which \(\left[ {T_{z^\beta } ^* ,C_\varphi ...
Barbara D. MacCluer, Rachel J. Weir
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Characterizations of binormal composition operators with linear fractional symbols on H2

Applied Mathematics and Computation, 2015
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Sungeun Jung, Yoenha Kim, Eungil Ko
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