Degree of Best Approximation by Trigonometric Blending Functions.
Der Satz von Fenchel in der konvexen Optimierung.
Development in series of orthogonal polynomials with applications in optimization.
Die Metrische Struktur der Sonnen in l...(n).
Differentiability of the distance function and points of multi-valuedness of the metric projection in Banach space
Dispersed Chebyshev Sets and Coverings by Balls.