Best Co-approximation and Worst Approximation by Closed Unit Balls

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Article Type:
Research/Original Article (بدون رتبه معتبر)
Abstract:
‎A kind of approximation‎, ‎called best coapproximation was‎ introduced and discussed in normed linear spaces by C‎. ‎Franchetti and M‎. Furi in 1972‎. ‎Subsequently‎, ‎this study was taken up by several researchers‎ in different abstract spaces‎. In this paper‎, ‎we consider best coapproximation by closed unit balls‎. ‎We define qcoproximinal and coremotal‎, ‎and find some theorems.
Language:
English
Published:
Theory of Approximation and Applications, Volume:16 Issue: 2, Summer and Autumn 2022
Pages:
55 to 65
https://www.magiran.com/p2553014