Best uniform approximation of semi-Lipschitz functions by extensions

In this paper we consider the problem of best uniform approximation of a real valued semi-Lipschitz function \(F\) defined on an asymmetric metric space \((X,d),\) by the elements of the set \(\mathcal{E}_{d}(\left. F\right\vert _{Y})\) of all extensions of \(\left.F\right\vert _{Y}\) \((Y\subset X)...

Full description

Bibliographic Details
Main Author: Costică Mustăţa
Format: Article
Language:English
Published: Publishing House of the Romanian Academy 2007-08-01
Series:Journal of Numerical Analysis and Approximation Theory
Subjects:
Online Access:https://www.ictp.acad.ro/jnaat/journal/article/view/864