Results 21 to 30 of about 4,637,538 (347)

Boundedness and essential norm of an integral-type operator on a Hilbert–Bergman-type spaces

Journal of Inequalities and Applications, 2019
Let D ${\mathbb {D}} $ be the open unit disk of the complex plane C ${\mathbb {C}} $ and H(D) $H({\mathbb {D}} )$ be the space of all analytic functions on D ${\mathbb {D}} $.
Stevo Stević, Zhi-Jie Jiang
doaj   +2 more sources

Interpolation of the essential spectrum and the essential norm [PDF]

Banach Center Publications, 2005
Asuman Güven Aksoy, Hans-Olav Tylli
openalex   +3 more sources

The Essential Norm of the Generalized Hankel Operators on the Bergman Space of the Unit Ball in Cn [PDF]

Abstract and Applied Analysis, 2010
In 1993, Peloso introduced a kind of operators on the Bergman space A2(B) of the unit ball that generalizes the classical Hankel operator. In this paper, we estimate the essential norm of the generalized Hankel operators on the Bergman space Ap(B)  (p>1)
Luo Luo, Yang Xuemei
doaj   +2 more sources

The essential norm of operators in the Toeplitz algebra on $A^p(B_n)$ [PDF]

Indiana University Mathematics Journal, 2007
Fil: Suarez, Fernando Daniel. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Oficina de Coordinacion Administrativa Saavedra 15.
Daniel Suárez
openalex   +4 more sources

Essential Norm of Operators into Weighted-Type Spaces on the Unit Ball [PDF]

Abstract and Applied Analysis, 2011
The essential norm of any operator from a general Banach space of holomorphic functions on the unit ball in ℂn into the little weighted-type space is calculated. Some applications of the formula are given.
Pablo Galindo, Mikael Lindström, Stevo Stević   +2 more
doaj   +2 more sources

The essential norm of a weighted composition operator on BMOA [PDF]

Mathematische Zeitschrift, 2013
We provide an estimate for the essential norm of a weighted composition operator $W_{ , }\colon f\mapsto (f\circ )$ acting on the space $BMOA$ in terms of the weight function $ $ and the $n$-th power $ ^n$ of the analytic self-map $ $ of the open unit disc $\mathbb{D}$.
Jussi Laitila, Mikael Lindström
openalex   +5 more sources

Continuity and essential norm of operators defined by infinite tridiagonal matrices in weighted Orlicz and l∞ spaces

Open Mathematics
In this article, we provide a comprehensive study on the continuity and essential norm of an operator defined by an infinite tridiagonal matrix, specifically when it operates from a weighted Orlicz sequence space or a weighted l∞{l}^{\infty } space into ...
Ramos-Fernández Julio C., Ramos-Salas Carlos J., Salas-Brown Margot   +2 more
doaj   +2 more sources

Essential Norm of Difference of Composition Operators from Weighted Bergman Spaces to Bloch-Type Spaces

Journal of Function Spaces, 2018
We compute upper and lower bounds for essential norm of difference of composition operators acting from weighted Bergman spaces to Bloch-type spaces.
Ram Krishan, Mehak Sharma, Ajay K. Sharma   +2 more
doaj   +2 more sources

Essential Norm of Products of Volterra-Type Operators and Composition Operators on Iterated Banach-Type Spaces

Axioms
Let H(D) be the set of analytic functions on the open unit disk D. For n∈N0:=N∪{0}, define the iterated weighted-type Banach space Vn:=f∈H(D):supz∈D(1−|z|2)|f(n)(z)|
Rabab Alyusof, Shams Alyusof, Nacir Hmidouch   +2 more
doaj   +2 more sources

ESSENTIAL NORM OF THE PULL BACK OPERATOR

Korean Journal of Mathematics, 2016
We obtain some estimations of the essential norm of a pull back operator induced by quasi-symmetric homeomorphisms. As a corollary, we deduce the compactness criterion of this operator.
Tang Shuan, Wu Chong
openaire   +4 more sources