Titlebook: Linear Spaces and Approximation / Lineare Räume und Approximation; Proceedings of the C P. L. Butzer,B. Szökefalvi-Nagy Conference proceedi

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Kodissipative Metrische Projektionen in Normierten Linearen RäumenLet H be a real inner product space with inner product <.,.>. For any subset K of H the metric projection P.:H → P(K) is monotone, i.e., for any (x,k), (x’,k’) ∈P. < k-k’,x-x’ > ≥ 0. This property is used to characterize closed convex sets in Hilbert space.

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Conference proceedings 1978n Theory‘, conducted by P. L. Butzer (Aachen) and J. Korevaar (Amsterdam). Since that auspicious beginning, others of the Oberwolfach proceedings have appeared in Birkhauser‘s ISNM series. The present volume is the fifth * edited at Aachen in collaboration with an external institution. It once again