Results 11 to 20 of about 482 (178)

Binary Operations in Metric Spaces Satisfying Side Inequalities

open access: yesMathematics, 2021
The theory of metric spaces is a convenient and very powerful way of examining the behavior of numerous mathematical models. In a previous paper, a new operation between functions on a compact real interval called fractal convolution has been introduced.
María A. Navascués   +2 more
doaj   +1 more source

Uniformly factoring weakly compact operators and parametrised dualisation

open access: yesForum of Mathematics, Sigma, 2021
This article deals with the problem of when, given a collection $\mathcal {C}$ of weakly compact operators between separable Banach spaces, there exists a separable reflexive Banach space Z with a Schauder basis so that every element in $\mathcal {C ...
L. Antunes, K. Beanland, B. M. Braga
doaj   +1 more source

On Λ-Fibonacci difference sequence spaces of fractional order

open access: yesDera Natung Government College Research Journal, 2021
In this article, we introduce -Fibonacci difference operator of fractional order  which is obtained by the composition of -Fibonacci matrix  and backward fractional difference operator  defined by  and introduce the sequence spaces  and  We give some ...
Taja Yaying
doaj   +1 more source

A geometrical characterization of Schauder basis [PDF]

open access: yesArchiv der Mathematik, 1980
Concerning basis in a Banach space, a characterization for a weak basis to be a Schauder basis is given in terms of the geometrical behavior of the set of linear, closed hulls wich are generated by subsequences of the expansion sequences of the basis.
openaire   +5 more sources

Embedding subspaces of 𝑙ⁿ_{∞} into spaces with Schauder basis [PDF]

open access: yesProceedings of the American Mathematical Society, 1993
It is proved that for sufficiently small ε > 0
Piotr Mankiewicz   +1 more
openaire   +1 more source

Some New Cauchy Sequence Spaces

open access: yesUniversal Journal of Mathematics and Applications, 2018
In this paper, our goal is to introduce some new Cauchy sequence spaces. These spaces are defined by Cauchy transforms. We shall use notations $C_{\infty }\left( s,t\right) $, $C\left( s,t\right) $ and $C_{0}\left( s,t\right) ~$for these new sequence ...
Harun Polat
doaj   +1 more source

Constraint Qualification with Schauder Basis for Infinite Programming Problems

open access: yesApplied Mathematics & Optimization, 2023
AbstractWe consider infinite programming problems with constraint sets defined by systems of infinite number of inequalities and equations given by continuously differentiable functions defined on Banach spaces. In the approach proposed here we represent these systems with the help of coefficients in a given Schauder basis.
E. M. Bednarczuk   +2 more
openaire   +1 more source

The Application Domain of Infinite Matrices with Algorithms

open access: yesUniversal Journal of Mathematics and Applications, 2018
The purpose of this paper is twofold. First, we define the new spaces and investigate some topological and structural properties. Also, we compute dual spaces of new spaces which are help us in the characterization of matrix mappings.
Murat Kirişçi
doaj   +1 more source

Orthogonal bases in a topological algebra are Schauder bases

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1992
In a topological algebra with separately continuous multiplication, the result quoted in the title is proved.
Subbash J. Bhatt, G. M. Deheri
doaj   +1 more source

Some Generalized Versions of Chevet–Saphar Tensor Norms

open access: yesMathematics, 2022
The paper is concerned with some generalized versions gE and wE of classical tensor norms. We find a Banach space E for which gE and wE are finitely generated tensor norms, and show that gE and wE are associated with the ideals of some E-nuclear ...
Ju Myung Kim
doaj   +1 more source

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