Results 21 to 30 of about 1,363 (195)

Pairs of Function Spaces and Exponential Dichotomy on the Real Line

open access: yesAdvances in Difference Equations, 2010
We provide a complete diagram of the relation between the admissibility of pairs of Banach function spaces and the exponential dichotomy of evolution families on the real line. We prove that if W∈ℋ(ℝ) and V∈𝒯(ℝ)
Adina Luminiţa Sasu
doaj   +2 more sources

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

Constructive utility functions on Banach spaces [PDF]

open access: yesJournal of Mathematical Analysis and Applications, 2009
Let \(X\) be a topological space and let ``\(\preceq\)'' be a preorder on \(X\) (a complete, reflexive, transitive binary relation). We say that ``\(\preceq\)'' is continuous if, for all \(x\in X\), the upper section \(U(x):=\{y\in X \,;\, y\succeq x\}\) and the lower section \(L(x):=\{y\in X \,;\, y\preceq x\}\) are closed subsets of \(X\).
Alcantud, Jose C. R.   +1 more
openaire   +4 more sources

Mixed Equilibrium Problems with Weakly Relaxed α-Monotone Bifunction in Banach Spaces

open access: yesJournal of Function Spaces and Applications, 2013
We introduce the class of mixed equilibrium problems with the weakly relaxed α-monotone bi-function in Banach spaces. Using the KKM technique, we obtain the existence of solutions for mixed equilibrium problem with weakly relaxed α-monotone bi-function ...
Wutiphol Sintunavarat
doaj   +1 more source

Generalized Grand Lebesgue Spaces Associated to Banach Function spaces [PDF]

open access: yesSahand Communications in Mathematical Analysis
In this paper we introduce the class of grand Lebesgue spaces associated to a Banach function space $X$ by replacing the role of the $L^1$-norm by the norm $\|\cdot\|_X$ in the classical construction of the generalized grand Lebesgue spaces.
Alireza Bagheri Salec   +2 more
doaj   +1 more source

Fractal Curves on Banach Algebras

open access: yesFractal and Fractional, 2022
Most of the fractal functions studied so far run through numerical values. Usually they are supported on sets of real numbers or in a complex field. This paper is devoted to the construction of fractal curves with values in abstract settings such as ...
María A. Navascués
doaj   +1 more source

Smoothness in Musielak-Orlicz Function Spaces Equipped with p-Amemiya Norm

open access: yesJournal of Harbin University of Science and Technology
The smoothness of Banach spaces is one of the important research content in the geometric theory of Banach spaces, which is closely related to the convexity of Banach spaces and the differentiability of norms.
XU Anqi, CUI Yunan
doaj   +1 more source

Approximative Compactness and Radon-Nikodym Property in w∗ Nearly Dentable Banach Spaces and Applications

open access: yesJournal of Function Spaces, 2015
Authors define w∗ nearly dentable Banach space. Authors study Radon-Nikodym property, approximative compactness and continuity metric projector operator in w∗ nearly dentable space.
Shaoqiang Shang, Yunan Cui
doaj   +1 more source

Fixed Points of Multivalued Maps in Modular Function Spaces

open access: yesFixed Point Theory and Applications, 2009
The purpose of this paper is to study the existence of fixed points for contractive-type and nonexpansive-type multivalued maps in the setting of modular function spaces. We also discuss the concept of w-modular function and prove fixed point results for
Marwan A. Kutbi, Abdul Latif
doaj   +2 more sources

Locally Nearly Uniformly Convex Points in Orlicz Spaces Equipped with the Luxemburg Norm

open access: yesAxioms
This research explores two novel geometric concepts—nearly convex points and locally nearly uniformly convex points within the frameworks of Banach spaces and Orlicz spaces equipped with the Luxemburg norm.
Yunan Cui, Xiaoxia Wang, Yaoming Niu
doaj   +1 more source

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