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Non-Convexity in Best Complex Chebyshev Approximation by Rational Functions
Published online by Cambridge University Press: 20 November 2018
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In real Chebyshev approximation by generalized rational functions, constraining denominators to be positive guarantees that the set of best coefficients is convex [1, 181]. We show by means of an example that denominators must be constrained to be of constant argument for such a convexity result to hold in complex Chebyshev approximation.
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- Copyright © Canadian Mathematical Society 1974