Results 61 to 70 of about 118 (114)

A Survey on Renorming and Set Convergence

open access: yes, 1995
. This article presents a survey of some recent results relating set convergence and renorming. We focus most of our attention on norms having various Kadec--Klee properties and their interplay with certain forms of set convergence including Wijsman and ...
Jon D. Vanderwerff   +3 more
core   +1 more source

Densely Two-Valued Metric Projections in Uniformly Convex Banach Spaces

open access: yes, 1994
For every uniformly convex Banach space X with dim X ≥ 2 there is a residual set U in the Hausdorff metric space B(X) of hounded and closed sets in X such that a metric projection generated by a set from U is two-valued and upper semicontinuous on a ...
Zhivkov, N. V.
core   +1 more source

On estimates of the generalized Jordan-von Neumann constant of Banach spaces

open access: yes, 2006
. In this paper, we study the generalized Jordan-von Neumann constant and obtain its estimates for the normal structure coefficient N(X), improving the known results of S. Dhompongsa. Key words and phrases: Generalized Jordan-von Neumann constant; Normal
Changsen Yang, Fenghui Wang
core  

Approximate best proximity point sequences for C*λ mappings in strictly convex Banach spaces

open access: yes, 2021
Let A and B be nonempty subsets of a Banach space X and T : A → B be a non-self mapping. An approximate sequence of best proximity points for the mapping T is a sequence {xn } in ...
Gabeleh, M.   +2 more
core  

Remark on the Daugavet property for complex Banach spaces

open access: yesDemonstratio Mathematica
In this article, we study the Daugavet property and the diametral diameter two properties (DD2Ps) in complex Banach spaces. The characterizations for both Daugavet and Δ\Delta -points are revisited in the context of complex Banach spaces. We also provide
Lee Han Ju, Tag Hyung-Joon
doaj   +1 more source

On Moduli of Convexity in Banach Spaces

open access: yes, 2004
We provide an example to show that the moduli of convexity δ E and β E are different. Our example allows us to prove that 2 is the best possible constant in the inequality δE ≤ βE ≤ 2δE and that βE does not need ...
Gurariy, Vladimir   +3 more
core  

Angular measures and Birkhoff orthogonality in Minkowski planes. [PDF]

open access: yesAequ Math, 2020
Naszódi M, Prokaj V, Swanepoel K.
europepmc   +1 more source

Good projections of spaces of vector measures onto subspaces of Bochner integrable functions

open access: yes, 2004
We show that the complementability of L1(μ, X) in cabv(μ, X) implies the complementability of L1(μ, K(Z, X)) in cabv(μ, K(Z, X)), provided the projection from cabv(μ, X) onto L1(μ, X) is “good”, Z* is separable and K(
Emmanuele, Giovanni
core  

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