A characterization of strictly convex metric linear spaces.
Best coapproximation in metric spaces.
Banach-Steinhauss theorem in quasi normed spaces
Some fixed point theorems with applications to best simultaneous approximations.
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
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