Results 1 to 10 of about 31,659 (204)

Denseness of Numerical Radius Attaining Holomorphic Functions

open access: yesJournal of Inequalities and Applications, 2009
We study the density of numerical radius attaining holomorphic functions on certain Banach spaces using the Lindenstrauss method. In particular, it is shown that if a complex Banach space X is locally uniformly convex, then the set of all numerical ...
Han Ju Lee
doaj   +1 more source

Strong Convergence to Common Fixed Points of Countable Relatively Quasi-Nonexpansive Mappings

open access: yesFixed Point Theory and Applications, 2008
We prove that a sequence generated by the monotone CQ-method converges strongly to a common fixed point of a countable family of relatively quasi-nonexpansive mappings in a uniformly convex and uniformly smooth Banach space. Our result is applicable to a
Satit Saejung, Weerayuth Nilsrakoo
doaj   +1 more source

Fibers over the sphere of a uniformly convex Banach space.

open access: yesMichigan Mathematical Journal, 1998
Let \(B\) be the open unit ball of an infinite-dimensional complex Banach space \(X\). In this paper the author studies the boundary behavior of bounded analytic functions on \(B\) when \(X\) is uniformly convex. Several interesting results are obtained regarding the structure of the spectrum of \(H^\infty (B)\).
openaire   +2 more sources

No-Dimensional Helly’s Theorem in Uniformly Convex Banach Spaces

open access: yesStudia Scientiarum Mathematicarum Hungarica
We study the “no-dimensional” analogue of Helly’s theorem in Banach spaces. Specifically, we obtain the following no-dimensional Helly-type results for uniformly convex Banach spaces: Helly’s theorem, fractional Helly’s theorem, colorful Helly’s theorem, and colorful fractional Helly’s theorem.The combinatorial part of the proofs for these Helly-type ...
openaire   +3 more sources

Existence of sunny nonexpansive retractions and approximation of fixed points of a representation of nonexpansive mappings

open access: yesNonlinear Analysis
This paper presents an implicit scheme for a representation of nonexpansive mappings on a closed convex subset of a smooth uniformly convex Banach space with respect to a left-regular sequence of means defined on a subset of l∞(S).
Ebrahim Soori   +2 more
doaj   +1 more source

Nonsurjective Coarse Isometries of Uniformly Convex Banach Spaces

open access: yesJournal of Function Spaces
We apply Pisier’s inequality to establish the stability property of nonsurjective coarse isometries from a Banach space to a uniformly convex space. Making use of this result, we extend some known conclusions on (ε, p) isometries of Hilbert spaces and Lq spaces.
openaire   +2 more sources

Uniformly non-$l^{(1)}$ and B-convex Banach spaces [PDF]

open access: yesStudia Mathematica, 1973
Giesy, D. P., James, R. C.
openaire   +2 more sources

Strongly unique best approximation in uniformly convex Banach spaces

open access: yesJournal of Approximation Theory, 1989
Let Y be a closed subspace of a Banach space X. An element \(z\in Y\) is called a strongly unique best approximation of order \(\alpha\) \((\alpha >1)\) at x, if for some \(M>0\) there exists \(\gamma =\gamma (x,M)>0\) such that, for all \(y\in Y\) with \(\| y-z\| \leq M\), \(\| y-x\| \geq \| z-x\| +\gamma \| y-z\|^{\alpha}.\) Results concerning strong
openaire   +1 more source

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