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math.FA2014

Best approximation of Heaviside-type functions in Chebyshev and weak-Chebyshev spaces

Laurent Gajny, Olivier Gibaru, Eric Nyiri +1

In this article, we study the problem of best approximation of Heaviside-type functions in Chebyshev and weak-Chebyshev spaces. We extend the Hobby-Rice theorem into an appro…