Results 31 to 40 of about 4,892,851 (274)

A bicommutant theorem for dual Banach algebras [PDF]

open access: yes, 2010
A dual Banach algebra is a Banach algebra which is a dual space, with the multiplication being separately weak$^*$-continuous. We show that given a unital dual Banach algebra $\mc A$, we can find a reflexive Banach space $E$, and an isometric, weak ...
Daws, Matthew
core   +1 more source

Some properties of b-weakly compact operators on Banach lattices

open access: yesپژوهش‌های ریاضی, 2021
In this paper we give some necessary and sufficient conditions for which each Banach lattice  is    space and we study some properties of b-weakly compact operators from a Banach lattice  into a Banach space .
Kazem Haghnejad azar, Akbar Bahramnezhad
doaj  

Group‐symmetric holomorphic functions on a Banach space

open access: yes, 2016
We study the holomorphic functions on a complex Banach space E that are invariant under the action of a given group of operators on E . A great variety of situations occur depending, of course, on the group and the space. Nevertheless, in the examples we
R. Aron   +3 more
semanticscholar   +1 more source

Nontrivial isometries on sp(α)

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1982
sp(α) is a Banach space of sequences x with ‖x‖=(∑i=0∞|xi|p+α∑i=0∞|xi+1−xi|p)1/p.
Stephen L. Campbell
doaj   +1 more source

Generalized mixed equilibrium and fixed point problems in a Banach space

open access: yes, 2016
In this paper, a quasi-φ-nonexpansive mapping and a generalized mixed equilibrium problem are investigated. A strong convergence theorem of common solutions is established in a non-uniformly convex Banach space. The results presented in the paper improve
S. Cho
semanticscholar   +1 more source

Geometric Properties of Generalized Von Neumann Constant

open access: yesJournal of Harbin University of Science and Technology, 2023
Spatial geometric constant is a quantization of the properties of spatial geometry. In order to further apply the geometric constant to study the geometry of the Banach space, a new generalized von Neumann constant is introduced.
ZHAO Liang, ZHAO Pingan
doaj   +1 more source

Very smooth points of spaces of operators [PDF]

open access: yes, 2003
In this paper we study very smooth points of Banach spaces with special emphasis on spaces of operators. We show that when the space of compact operators is an $M$-ideal in the space of bounded operators, a very smooth operator $T$ attains its norm at a ...
Rao, T. S. S. R. K.
core   +2 more sources

Extremal properties of the set of vector-valued Banach limits

open access: yesOpen Mathematics, 2015
In this manuscript we find another class of real Banach spaces which admit vector-valued Banach limits different from the classes found in [6, 7]. We also characterize the separating subsets of ℓ∞(X).
García-Pacheco Francisco Javier
doaj   +1 more source

A Characterization of Subspaces and Quotients of Reflexive Banach Spaces with Unconditional Bases

open access: yes, 2007
We prove that the dual or any quotient of a separable reflexive Banach space with the unconditional tree property has the unconditional tree property. Then we prove that a separable reflexive Banach space with the unconditional tree property embeds into ...
Johnson, W. B., Zheng, Bentuo
core   +2 more sources

On the problem of determining the parameter of an elliptic equation in a Banach space

open access: yes, 2014
The boundary value problem of determining the parameter of an elliptic equation u 00 (t) +Au(t) = f(t) +p (0 6 t 6 T), u(0) = '; u(T) = ; u( ) = ; 0 < < T , with a positive operator A in an arbitrary Banach space E is studied.
A. Ashyralyev   +2 more
semanticscholar   +1 more source

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