On Weight Functions for Chebyshev Quadrature.
On -suns
Optimal and Sard approximation
Perturbations of Best Approximation Problems.
Points minimaux dans les espaces de Banach
Points minimaux dans les espaces de Banach (suite)
Polinomios ortogonales asociados con problemas espectrales
Polynomial approximation and twenty years later.
Prediction in Orlicz Spaces.
Projections contractantes dans les espaces de Banach
Projections on spaces of continuous functions.
Proximinal subspaces of of finite codimension.
Proximinality and co-proximinality in metric linear spaces
As a counterpart to best approximation, the concept of best coapproximation was introduced in normed linear spaces by C. Franchetti and M. Furi in 1972. Subsequently, this study was taken up by many researchers. In this paper, we discuss some results on the existence and uniqueness of best approximation and best coapproximation when the underlying spaces are metric linear spaces
Proximinality in generalized direct sums.
Random fixed points and approximations in random convex metric spaces.
Random fixed points of non-self maps and random approximations.
Rate of convergence of the discrete Pólya algorithm from convex sets. A particular case.
Rational approximation on subsets, II.
Rational Chebyshev Approximation on the Unit Disk.
Rationale Tschebyscheff-Approximation über unbeschränkten Intervallen.