Title

Best approximation in (L1 ⊕ R)∞

Abstract

We prove necessary and sufficient conditions for X to be a Chebyshev subspace of (L1 ⊕ R)∞. Moreover, we find a nontrivial Chebyshev subspace of (L1 ⊕ c0)∞ when the scalar field is that of the complex numbers. © 1981.

Publication Title

Journal of Approximation Theory

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