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Journal of Inequalities and Applications, 2016 In this paper, we give some estimates of the essential norm for generalized weighted composition operators from the Bloch space to the Zygmund space. Moreover, we give a new characterization for the boundedness and compactness of the operator.
Qinghua Hu +3 more
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The essential norm of a weighted composition operator on BMOA [PDF]
Mathematische Zeitschrift, 2014 We provide an estimate for the essential norm of a weighted composition operator $W_{ψ,φ}\colon f\mapsto ψ(f\circφ)$ acting on the space $BMOA$ in terms of the weight function $ψ$ and the $n$-th power $φ^n$ of the analytic self-map $φ$ of the open unit disc $\mathbb{D}$.
Lindström Mikael, Laitila Jussi
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NORM/NORM-VET 2021: Usage of Antimicrobial Agents and Occurrence of Antimicrobial Resistance in Norway [PDF]
, 2022 Veterinærinstituttet overvåker forekomst av antibiotikaresistens i mikrober fra fôr, dyr og næringsmidler på oppdrag fra Mattilsynet. Dette gjøres i regi av NORM-VET, som er forkortelse for «Norsk overvåkingsprogram for antibiotikaresistens i mikrober ...
Elstrøm, Petter +4 more
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Mediating role of perceived service quality between behavioral characteristics, security risk and internet banking usage [PDF]
Banks and Bank Systems, 2022 Internet banking is an essential component of banking. However, most bank customers in Nigeria do not make optimal use of the service. The paper investigates the influence of behavioral characteristics, security risk and perceived service quality on ...
Salome O. Ighomereho +1 more
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Inequalities involving norm and essential norm of weighted composition operators [PDF]
Journal of Mathematical Inequalities, 2017 Summary: We characterize the boundedness and compactness of the weighted composition operator acting from the weighted Bergman space \(\mathcal{A}^p(\sigma)\) to the Zygmund-type space \(\mathcal{Z}_\nu\), where \(\sigma\) is an admissible weight and \(\nu\) is a normal weight. Some upper and lower bounds for the norm and essential norm of the operator
Sharma, Ajay K. +3 more
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The essential norms of composition operators [PDF]
Glasgow Mathematical Journal, 1992 Throughout the paper n denotes a fixed positive integer unless otherwise specified. Let B = Bn denote the open unit ball of ℂn and let S = Sn denote its boundary, the unit sphere. The unique rotation-invariant probability measure on 5 will be denoted by σ = σn. For n = l, we use more customary notations D = B1, T = S1 and dσ1= dθ/2π. The Hardy space on
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MathematicsIn this work, we characterize the boundedness of t-generalized composition operators from F(p, q, s) spaces to iterated weighted-type Banach space. We also provide estimates of the norm and the essential norm of t-generalized composition operators from F(
Shams Alyusof, Nacir Hmidouch
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Duality of the weak essential norm [PDF]
Proceedings of the American Mathematical Society, 2000 It is established by an example that the natural quotient norms S ↦
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Essential norm of the differential operator [PDF]
Operators and Matrices, 2019 This paper is a follow-up contribution to our work [10] where we studied some spectral properties of the differential operator $D$ acting between generalized Fock spaces $\mathcal{F}_{(m,p)}$ and $\mathcal{F}_{(m,q)}$ when both exponents $p$ and $q$ are finite.
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Corrigendum to: Essential normality, essential norms and hyperrigidity
, 2015 In our paper "Essential normality, essential norms and hyperrigidity" we claimed that the restriction of the identity representation of a certain operator system (constructed from a polynomial ideal) has the unique extension property, however the justification we gave was insufficient.
Kennedy, Matthew, Shalit, Orr
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