Results 21 to 30 of about 580,219 (274)

$M$-ideals of compact operators [PDF]

open access: yesIllinois Journal of Mathematics, 1993
A subspace \(E\) of a Banach space \(X\) is called an \(M\)-ideal if the annihilator \(E^ \perp\) of \(E\) in the dual admits a subspace \(F\) such that \(X^*\) is the \(\ell^ 1\)-direct sum of \(E^ \perp\) and \(F\). The investigation of the problem whether for a space \(X\) the space of compact operators \(K(X)\) is an \(M\)-ideal in the bounded ...
openaire   +4 more sources

The gE-Approximation Property Determined by the Banach Space E = q(p)

open access: yesMathematics
We study the gE-approximation property for the Banach space E=ℓq(ℓp), which is an extension of Saphar’s p-approximation property. We establish some characterizations of the gE-approximation property using the space of E-summing operators, which is an ...
Ju Myung Kim
doaj   +1 more source

Calculation of particular solutions of nonhomogeneous linear equations with two linear operators, of which at least one is almost algebraic, in the case of simple roots of the characteristic equation [PDF]

open access: yesКомпьютерные исследования и моделирование, 2016
The concept of an operator is an almost algebraic with respect to two-sided ideal of the algebra of linear operators in some finite-dimensional linear spaces, it extended to the case when the ideal is left.
Vladimir G. Tsirulik
doaj   +1 more source

On Narrow Operators from $$L_p$$ into Operator Ideals

open access: yesMediterranean Journal of Mathematics, 2022
AbstractIt is well known that every $$l_2$$ l 2 -strictly singular operator from $$L_p$$ L p , $$1<p<\infty $$ 1
Jinghao Huang   +2 more
openaire   +1 more source

Small operator ideals formed by s numbers on generalized Cesáro and Orlicz sequence spaces

open access: yesJournal of Inequalities and Applications, 2018
In this article, we establish sufficient conditions on the generalized Cesáro and Orlicz sequence spaces E $\mathbb{E}$ such that the class SE $S_{\mathbb{E}}$ of all bounded linear operators between arbitrary Banach spaces with its sequence of s-numbers
Nashat Faried, Awad A. Bakery
doaj   +1 more source

Small Pre-Quasi Banach Operator Ideals of Type Orlicz-Cesáro Mean Sequence Spaces

open access: yesJournal of Function Spaces, 2019
In this paper, we give the sufficient conditions on Orlicz-Cesáro mean sequence spaces cesφ, where φ is an Orlicz function such that the class Scesφ of all bounded linear operators between arbitrary Banach spaces with its sequence of s-numbers which ...
Awad A. Bakery, Mustafa M. Mohammed
doaj   +1 more source

Normed Dual Algebras

open access: yesMathematics, 2019
This article is devoted to the investigation of dual and annihilator normed algebras. Their structure is studied in the paper. Extensions of algebras and fields are considered and by using them, core radicals and radicals are investigated.
Sergey V. Ludkowski
doaj   +1 more source

On tensor stable operator ideals.

open access: yesMichigan Mathematical Journal, 1989
An operator ideal \({\mathfrak A}\) is tensor stable with respect to a tensor norm \(\alpha\), provided that for all operators S,T belonging to \({\mathfrak A}\) also \(S{\tilde \oplus}_{\alpha}T\) belongs to \({\mathfrak A}\). The authors show that any non-proper Banach-operator ideal with \(\sup_{n}A(id_{\ell^ n_{\infty}})=\infty\), A being the ideal
Carl, B., Defant, A., Ramanujan, M. S.
openaire   +2 more sources

Polynomials in operator space theory: matrix ordering and algebraic aspects

open access: yes, 2017
We extend the $\lambda$-theory of operator spaces given by Defant and Wiesner (2014), that generalizes the notion of the projective, Haagerup and Schur tensor norm for operator spaces to matrix ordered spaces and Banach $*$-algebras. Given matrix regular
Kumar, Ajay   +2 more
core   +1 more source

The ασ-Approximation Property and Its Related Operator Ideals

open access: yesMathematics
In this paper, we study the σ-tensor norm (ασ), the absolutely τ-summing operator and the σ-nuclear operator. We characterize the ασ-approximation property in terms of some density of the space of absolutely τ-summing operators.
Ju Myung Kim
doaj   +1 more source

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