Results 101 to 110 of about 1,163,773 (213)

EMBEDDING THEOREMS IN BANACH -VALUED SOBOLEV-LIOUVILLE SPACES AND THEIR APPLICATIONS

open access: yesElectrica, 2002
In this paper we introduce a Banach- valued Sobolev-Liouville spaces associated with Banach spaces E1,E and some parameters and proved continuity and compacness of embedding operators in these spaces in terms of theory interpolations of Banach spaces ...
Veli SHAKHMUROV
doaj   +2 more sources

Fixed point theorems for generalized Lipschitzian semigroups in Banach spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1999
Fixed point theorems for generalized Lipschitzian semigroups are proved in p-uniformly convex Banach spaces and in uniformly convex Banach spaces. As applications, its corollaries are given in a Hilbert space, in Lp spaces, in Hardy space Hp, and in ...
Balwant Singh Thakur, Jong Soo Jung
doaj   +1 more source

Lipschitz‐free spaces over uniformly discrete metric spaces are 3‐Schur

open access: yesBulletin of the London Mathematical Society, Volume 58, Issue 10, October 2026.
Abstract We prove that the Lipschitz‐free space over any uniformly discrete metric space has the 3‐Schur property.
Marek Cúth, Ondřej F. K. Kalenda
wiley   +1 more source

Genericity and amalgamation of classes of Banach spaces

open access: yes, 2007
We study universality problems in Banach space theory. We show that if A is an analytic class, in the Effros–Borel structure of subspaces of C([0,1]), of non-universal separable Banach spaces, then there exists a non-universal separable Banach space Y ...
Argyros, Spiros A.   +5 more
core   +1 more source

A Variational Characterization of Reflexivity and Strict Convexity [PDF]

open access: yes, 1999
In this paper we give a variational characterization of reflexivity and strict convexity which is related to James and Krein theorems in Geometry of Banach ...
Dragomir, Sever S
core   +2 more sources

Antiproximinal Norms in Banach Spaces

open access: yesJournal of Approximation Theory, 2002
A closed convex subset \(C\) of a Banach space \((X,\| \;\| )\) is called antiproximinal if no point outside \(C\) has a nearest point in \(C\). This is equivalent to the property supp \(C \cap NA_{ \| \;\| }= \{0\}\), where supp \(C\) denotes the set of all support functionals of the set \(C\) and \(NA_{ \| \;\| }=\, \)supp \(B_ {\| \;\| }\) are the ...
Jonathan M. Borwein   +2 more
openaire   +2 more sources

Extreme and exposed points of shift‐invariant spaces generated by Gaussian kernel and hyperbolic secant

open access: yesBulletin of the London Mathematical Society, Volume 58, Issue 10, October 2026.
Abstract We characterize the extreme and exposed points of the unit ball (with respect to the L1$L^1$‐norm) in the shift‐invariant space generated by the Gaussian function, as well as in the quasi‐shift‐invariant space generated by the hyperbolic secant.
Markus Valås Hagen   +3 more
wiley   +1 more source

Generalized quasi-Banach sequence spaces and measures of noncompactness

open access: yesAnais da Academia Brasileira de Ciências, 2013
Given 0 < s ≤ 1 and ψ an s-convex function, s – ψ -sequence spaces are introduced. Several quasi-Banach sequence spaces are thus characterized as a particular case of s – ψ -spaces.
EDUARDO B. SILVA   +2 more
doaj   +1 more source

Criteria for Banach spaces [PDF]

open access: yesPacific Journal of Mathematics, 1972
Valentine, J. E., Wayment, S. G.
openaire   +2 more sources

On Zippin's Embedding Theorem of Banach spaces into Banach spaces with bases

open access: yesAdvances in Mathematics, 2015
We present a new proof of Zippin's Embedding Theorem, that every separable reflexive Banach space embeds into one with shrinking and boundedly complete basis, and every Banach space with a separable dual embeds into one with a shrinking basis. This new proof leads to improved versions of other embedding results.
openaire   +3 more sources

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