Results 31 to 40 of about 414,180 (260)

The boundedness of Bessel-Riesz operators on generalized Morrey spaces [PDF]

open access: yes, 2016
In this paper, we prove the boundedness of Bessel-Riesz operators on generalized Morrey spaces. The proof uses the usual dyadic decomposition, a Hedberg-type inequality for the operators, and the boundedness of Hardy-Littlewood maximal operator.
Eridani, Gunawan, H., Idris, M.
core   +2 more sources

Inequalities for the fractional convolution operator on differential forms

open access: yesJournal of Inequalities and Applications, 2018
The purpose of this paper is to derive some Coifman type inequalities for the fractional convolution operator applied to differential forms. The Lipschitz norm and BMO norm estimates for this integral type operator acting on differential forms are also ...
Zhimin Dai, Huacan Li, Qunfang Li
doaj   +1 more source

Volterra integral operator and essential norm on Dirichlet type spaces

open access: yesAIMS Mathematics, 2021
In this paper, we study the boundedness and essential norm of Volterra integral operator $ V_g $ and integral operator $ S_g $ on Dirichlet type spaces $ {\mathcal{D}_{K, \alpha}} $.
Liu Yang, Ruishen Qian
doaj   +1 more source

Appropriate Inner Product for PT-Symmetric Hamiltonians

open access: yes, 2017
A Hamiltonian $H$ that is not Hermitian can still have a real and complete energy eigenspectrum if it instead is $PT$ symmetric. For such Hamiltonians three possible inner products have been considered in the literature, the $V$ norm, the $PT$ norm, and ...
Mannheim, Philip D.
core   +1 more source

On operator norms of submatrices

open access: yesLinear Algebra and its Applications, 1981
AbstractBoth of the following conditions are equivalent to the absoluteness of a norm ν in Cn: (1) for all n×n diagonal matrices D=(dk), the subordinate operator norm Nν(D)=maxk|dk|; (2) for all n×n matrices A, Nν(A) ⩽Nν(|A|). These conditions are modified for partitioned matrices by replacing absolute values with norms of blocks.
openaire   +2 more sources

Probabilistic Norms for Linear Operators

open access: yesJournal of Mathematical Analysis and Applications, 1998
Let \(V_1\) and \(V_2\) be probabilistic normed (PN) spaces, and \(L\) the space of all linear operators \(T: V_1\to V_2\). The authors study the following subsets of \(L\): \(L_b\) probabilistic bounded operators, \(L_c\) continuous operators and \(L_{bc}= L_b\cap L_c\). They work with the Sibley metric on the space of distribution functions.
B. Lafuerza Guillén   +2 more
openaire   +6 more sources

Minimal norm Hankel operators [PDF]

open access: yes, 2022
This paper has been has been accepted for publication in Proceedings of the ...
openaire   +4 more sources

A Probabilistic Integral Study of Quasiproduct Overa Nonadditive Measure

open access: yesJournal of Harbin University of Science and Technology, 2021
In this paper, a definition of non additive measure is given, which has F-addability; the Einstein calculater is optimized, and the λ-fuzzy quasiproduct operator and λ-fuzzy quasi sum operator with adjustable parameters for practical problems are ...
ZHAO Hui, ZHANG Xiao-xue, ZHANG Shao-xin
doaj   +1 more source

Norms of sampling operators

open access: yesLinear Algebra and its Applications, 1998
The author obtains an upper and lower bound for the norm of the so-called sampling operator \(S_h(p,q)\). It is an operator obtained from the Laurent operator \(L_h\) [see \textit{I. Gohberg}, \textit{S. Goldberg} and \textit{M. A. Kaashoek}, ``Classes of linear operators.
openaire   +2 more sources

Rough norms in spaces of operators [PDF]

open access: yesMathematische Nachrichten, 2017
We investigate sufficient and necessary conditions for the space of bounded linear operators between two Banach spaces to be rough or average rough. Our main result is that is δ‐average rough whenever is δ‐average rough and Y is alternatively octahedral.
Rainis Haller   +2 more
openaire   +3 more sources

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