Author:
Al-Rashed Abdallah M.,Darst Richard B.
Abstract
Let (Ω, ,μ) be a probability space, and let be a sub-sigma-algebra of . Let X be a uniformly convex Banach space. Let A =L∞(Ω, , μ X) denote the Banach space of (equivalence classes of) essentially bounded μ-Bochner integrable functions g: Ω.→ X, normed by the function ∥.∥∞ defined for g ∈ A by(cf. [6] for a discussion of this space). Let B = L∞(Ω, , μ X), and let f ε A. A sufficient condition for g ε B to be a best L∞-approximation to f by elements of B is established herein.
Publisher
Cambridge University Press (CUP)
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1. Chapter III–Spaces of Bounded, Measurable Functions;Saks Spaces and Applications to Functional Analysis;1987