Results 21 to 30 of about 377 (61)

Some extremal properties of section spaces of Banach bundles and their duals

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 29, Issue 10, Page 563-572, 2002., 2002
When X is a compact Hausdorff space and E is a real Banach space there is a considerable literature on extremal properties of the space C(X, E) of continuous E‐valued functions on X. What happens if the Banach spaces in which the functions on X take their values vary over X?
D. A. Robbins
wiley   +1 more source

On the super-stability of trigonometric Hilbert-valued functional equations

open access: yes, 2014
We generalize the super-stability result for cosine functional equation mappings with values in the field of complex numbers to the case of an arbitrary Hilbert space with the Hadamard product.
H. Rezaei
semanticscholar   +1 more source

A Riesz representation theorem for cone‐valued functions

open access: yesAbstract and Applied Analysis, Volume 4, Issue 4, Page 209-229, 1999., 1999
We consider Borel measures on a locally compact Hausdorff space whose values are linear functionals on a locally convex cone. We define integrals for cone‐valued functions and verify that continuous linear functionals on certain spaces of continuous cone‐valued functions endowed with an inductive limit topology may be represented by such integrals.
Walter Roth
wiley   +1 more source

Abstract-valued Orlicz spaces of range-varying type

open access: yesOpen Mathematics, 2018
This paper mainly deals with the abstract-valued Orlicz spaces of range-varying type. Using notions of Banach space net and continuous modular net etc., we give definitions of Lϱθ(⋅)(I, Xθ(⋅)) and L+ϱθ(⋅)$\begin{array}{} L_{+}^{\varrho_{\theta(\cdot)}} \
Zhang Qinghua
doaj   +1 more source

Lorentz space estimates for vector fields with divergence and curl in Hardy spaces [PDF]

open access: yes, 2013
In this note, we establish the estimate on the Lorentz space $L(3/2,1)$ for vector fields in bounded domains under the assumption that the normal or the tangential component of the vector fields on the boundary vanishing.
Giga, Yoshikazu, Xiang, Xingfei
core   +2 more sources

Multiplication operators on weighted spaces in the non‐locally convex framework

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 20, Issue 1, Page 75-79, 1997., 1995
Let X be a completely regular Hausdorff space, E a topological vector space, V a Nachbin family of weights on X, and CV0(X, E) the weighted space of continuous E‐valued functions on X. Let θ : X → C be a mapping, f ∈ CV0(X, E) and define Mθ(f) = θf (pointwise). In case E is a topological algebra, ψ : X → E is a mapping then define Mψ(f) = ψf (pointwise)
L. A. Khan, A. B. Thaheem
wiley   +1 more source

Boundedness of vector-valued B-singular integral operators in Lebesgue spaces

open access: yesOpen Mathematics, 2017
We study the vector-valued B-singular integral operators associated with the Laplace-Bessel differential operator △B=∑k=1n−1∂2∂xk2+(∂2∂xn2+2vxn∂∂xn),v>0. $$\triangle_{B}=\sum\limits_{k=1}^{n-1}\frac{\partial^{2}}{\partial x_{k}^{2}}+(\frac{\partial^{2}}{\
Keles Seyda, Omarova Mehriban N.
doaj   +1 more source

Solution to the first Cousin problem for vector-valued quasianalytic functions [PDF]

open access: yes, 2017
We study spaces of vector-valued quasianalytic functions and solve the first Cousin problem in these spaces.Comment: 23 ...
Debrouwere, Andreas, Vindas, Jasson
core   +3 more sources

On the super-stability of exponential Hilbert-valued functional equations

open access: yes, 2011
We generalize the well-known Baker's super-stability result for exponential mappings with values in the field of complex numbers to the case of an arbitrary Hilbert space with the Hadamard product.
H. Rezaei, M. Sharifzadeh
semanticscholar   +1 more source

L‐correspondences: the inclusion Lp(μ, X) ⊂ Lq(ν, Y)

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 19, Issue 4, Page 723-726, 1996., 1995
In order to study inclusions of the type Lp(μ, X) ⊂ Lq(ν, Y), we introduce the notion of an L‐correspondence. After proving some basic theorems, we give characterizations of some types of L‐correspondences and offer a conjecture that is similar to an equimeasurability theorem.
C. Bryan Dawson
wiley   +1 more source

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