Results 101 to 110 of about 476,682 (147)

Frechet differentiability of the metric projection operator in Banach spaces [PDF]

open access: yesarXiv
In this paper, we prove Frechet differentiability of the metric projection operator onto closed balls, closed and convex cylinders and positives cones in uniformly convex and uniformly smooth Banach spaces. With respect to these closed and convex subsets, we find the exact expressions for Frechet derivatives and Gateaux directional derivatives of the ...
arxiv  

Non-uniformly continuous nearest point maps

open access: yes
We construct a Banach space satisfying that the nearest point map (also called proximity mapping or metric projection) onto any compact and convex subset is continuous but not uniformly continuous.
Medina, Rubén, Quilis, Andrés
core  

On some fixed point theorems on uniformly convex Banach spaces

open access: yesJournal of Mathematical Analysis and Applications, 1992
AbstractWe introduce a notion of T-regularity to generalize a well known fixed point theorem of Browder. We also give some related results in this direction.
openaire   +2 more sources

Strongly unique best approximation in uniformly convex Banach spaces

open access: yesJournal of Approximation Theory, 1989
On etend aux espaces uniformement convexes quelques theoremes d'Angelos-Egger-Smarzewski relatifs a la meilleure approximation fortement ...
openaire   +2 more sources

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

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