EMIS ELibM Electronic Journals PUBLICATIONS DE L'INSTITUT MATHÉMATIQUE (BEOGRAD) (N.S.)
Vol. 51(65), pp. 71--76 (1992)

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Best coapproximation in metric spaces

T.D. Narang

Department of Mathematics, Guru Nanak Dev University, Amritsar 143005, India.

Abstract: As a counterpart to best approximation, the concept of best coapproximation in normed linear spaces was introduced by C. Franchetti and M. Furi [2] in 1972. This study was subsequently pursued in normed linear spaces and Hilbert spaces by H. Behrens, L. Hetzelt, P.\,L. Papini, Geetha S. Rao, Ivan Singer, U. Westphal, the author and a few others (see e.g. [3], [5], [7]). In this paper we discuss best coapproximation in metric spaces there by generalizing some of the results proved in [3], [7] and [8].

Classification (MSC2000): 41A65; 41A50

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Electronic fulltext finalized on: 2 Nov 2001. This page was last modified: 16 Nov 2001.

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