Results 11 to 20 of about 916 (191)

Maximal Factorization of Operators Acting in Kothe-Bochner Spaces [PDF]

open access: yes, 2021
[EN] Using some representation results for Kothe-Bochner spaces of vector valued functions by means of vector measures, we analyze the maximal extension for some classes of linear operators acting in these spaces.
Galaz-Fontes, F.   +3 more
core   +1 more source

PRODUCT FACTORABLE MULTILINEAR OPERATORS DEFINED ON SEQUENCE SPACES [PDF]

open access: yes, 2020
We prove a factorization theorem for multilinear operators acting in topological products of spaces of (scalar) p-summable sequences through a product. It is shown that this class of multilinear operators called product factorable maps coincides with the
ERDOĞAN, EZGİ
core   +1 more source

Weighted Banach spaces of analytic functions with sup-norms and operators between them: a survey [PDF]

open access: yes, 2022
[EN] In this survey we report about recent work on weighted Banach spaces of analytic functions on the unit disc and on the whole complex plane defined with sup-norms and operators between them.
Bonet Solves, José Antonio
core   +1 more source

Optimal extensions of compactness properties for operators on Banach function spaces [PDF]

open access: yes, 2015
Compactness type properties for operators acting in Banach function spaces are not always preserved when the operator is extended to a bigger space. Moreover, it is known that there exists a maximal (weakly) compact linear extension of a (weakly) compact
Jiménez Fernández, Eduardo   +6 more
core   +1 more source

Local and asymptotic approximations of nonlinear operators by (𝑘₁,…𝑘_{𝑁})-homogeneous operators [PDF]

open access: yes, 1973
Notions of local and asymptotic approximations of a nonlinear mapping F between normed linear spaces by a sum of N k i {k_i} -homogeneous operators are defined and investigated.
R. H. Moore, M. Z. Nashed
core   +1 more source

Subspaces of Hilbert-generated Banach spaces and the quantification of super weak compactness [PDF]

open access: yes, 2023
© 2023 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).We introduce a measure of super weak noncompactness Γ defined for bounded subsets and ...
Grelier, Guillaume Guy Marcel   +1 more
core  

Linear transformation of Tauberian type in normed spaces [PDF]

open access: yes, 1990
Let $T : D(T) ⊂ X → Y$ be a linear transformation where X and Y are normed spaces. We call T Tauberian if $(T'')-1(Q\hat{Y})⊂ \tilde{D}(T)\wedge$ where Q is the quotient map defined on $Y''$ with kernel $D(T')\bot$.Bounded Tauberian operators in Banach ...
Cross, R.W.
core   +1 more source

Existence and Topological Properties of Solution Sets for Differential Inclusions with Delay [PDF]

open access: yes, 2008
We consider the problem \(\dot{x}(t) \in A(t)x(t) + F (t, θ_t x))\) a.e. on \([0, b]\), \(x = \kappa\) on \([-d, 0]\) in a Banach space \(E\), where \(\kappa\) belongs to the Banach space, \(C_E ([-d, 0])\), of all continuous functions from \([-d, 0 ...
Gomaa, Adel Mahmoud
core   +1 more source

Different Types of Weighted Composition Operators on Banach Spaces of Analytic Functions [PDF]

open access: yes, 2023
Many problems in real life are, at least approximatively, of linear nature and can be mathematically examined with the aid of linear spaces. It is natural to measure the size of objects occurring in the problems and such an operation is called a norm. If
Norrbo, David
core  

On existence solutions and solution sets of differential equations and differential inclusions with delay in Banach spaces [PDF]

open access: yes, 2012
Let CE([−d,0]) (resp. CB(0,T)([−d,0]) be the Banach space of continuous functions from [−d,0] into a Banach space E (resp. into B(0,T)), where B(0,T)={x∈E : ∥x∥⩽T} and let C∈CE([-d,0]).
A.M. Gomaa, Gomaa, A.M.
core   +1 more source

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