Results 31 to 40 of about 8,714,469 (204)

Quasi-Differentiable Functions on Banach Spaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1971
Nonzero Fréchet differentiable functions with bounded support do not exist on certain real separable Banach spaces. As a result, the class of differentiable functions on such spaces is too small to be useful. For example, the class of differentiable functions on certain spaces does not separate disjoint closed subsets of the space.
openaire   +2 more sources

Elementary evolutions in Banach algebra [PDF]

open access: yes, 2013
An elementary class of evolutions in unital Banach algebras is obtained by integrating product functions over Guichardet's symmetric measure space on the half-line.
Lindsay, J. Martin, Das, Bata Krishna
core   +4 more sources

Bregman Asymptotic Pointwise Nonexpansive Mappings in Banach Spaces

open access: yesAbstract and Applied Analysis, 2013
We first introduce a new class of mappings called Bregman asymptotic pointwise nonexpansive mappings and investigate the existence and the approximation of fixed points of such mappings defined on a nonempty, bounded, closed, and convex subset C of a ...
Chin-Tzong Pang, Eskandar Naraghirad
doaj   +1 more source

On Banach function M-spaces

open access: yesIndagationes Mathematicae, 2002
Suppose \((\Omega, {\mathcal A}, \mu)\) is a \(\sigma\)-finite measure space and \(L^\infty (\Omega , \mu)\) the classical \(M\)-space of \(\mu\)-essentially bounded real \(\mu\)-measurable functions. This paper presents the author's detailed analysis of the so-called Banach function \(M\)-spaces. A special case is the \(L^\infty\)-modules of \(\mathbb
openaire   +2 more sources

Variational Convexity of Functions in Banach Spaces

open access: yes, 2023
This paper addresses the study and characterizations of variational convexity of extended-real-valued functions on Banach spaces. This notion has been recently introduced by Rockafellar, and its importance has been already realized and applied to continuous optimization problems in finite-dimensional spaces.
Khanh, Pham Duy   +3 more
openaire   +2 more sources

Bregman f-Projection Operator with Applications to Variational Inequalities in Banach Spaces

open access: yesAbstract and Applied Analysis, 2014
Using Bregman functions, we introduce the new concept of Bregman generalized f-projection operator ProjCf, g:E*→C, where E is a reflexive Banach space with dual space E*; f: E→ℝ∪+∞ is a proper, convex, lower semicontinuous and bounded from below function;
Chin-Tzong Pang   +2 more
doaj   +1 more source

Simplification method for nonlinear equations of monotone type in Banach space

open access: yesЖурнал Средневолжского математического общества, 2021
In a Banach space, we study an operator equation with a monotone operator $T.$ The operator is an operator from a Banach space to its conjugate, and $T=AC,$ where $A$ and $C$ are operators of some classes.
Ryazantseva Irina P.
doaj   +1 more source

A note on local asymptotic behaviour for Brownian motion in Banach spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1979
In this paper we obtain an integral characterization of a two-sided upper function for Brownian motion in a real separable Banach space. This characterization generalizes that of Jain and Taylor [2] where B=ℝn.
Mou-Hsiung Chang
doaj   +1 more source

Best approximations of the ϕ-Hadamard fractional Volterra integro-differential equation by matrix valued fuzzy control functions

open access: yesAdvances in Difference Equations, 2021
In this article, first, we present an example of fuzzy normed space by means of the Mittag-Leffler function. Next, we extend the concept of fuzzy normed space to matrix valued fuzzy normed space and also we introduce a class of matrix valued fuzzy ...
Safoura Rezaei Aderyani, Reza Saadati
doaj   +1 more source

On the Generalization of a Multiplicity Result

open access: yesMathematics, 2022
In this work, we shifted a recent multiplicity result by B. Ricceri from a Hilbert space to a Banach space setting by making use of a duality mapping relative to some increasing function.
Marek Galewski
doaj   +1 more source

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