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Strong unicity of arbitrary rate. (English) Zbl 0517.41031

##### MSC:
 41A65 Abstract approximation theory (approximation in normed linear spaces and other abstract spaces) 41A50 Best approximation, Chebyshev systems
##### Keywords:
strong unicity; rate function; constraints; Banach space
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##### References:
 [1] Chalmers, B.L, A unified approach to uniform real approximation with linear restrictions, Trans. amer. math. soc., 166, 309-316, (1972) · Zbl 0252.41005 [2] Chalmers, B.L; Taylor, G.D, Uniform approximation with constraints, Jahresber. Deutsch. math-verein., 81, 49-86, (1979) · Zbl 0438.41001 [3] Chalmers, B.L; Taylor, G.D, On the existence of strong unicity of arbitrarily small order, (), 293-298 · Zbl 0494.41017 [4] Fletcher, Y; Roulier, J.A, A counterexample to strong unicity in monotone approximation, J. approx. theory, 27, 19-33, (1979) · Zbl 0452.41006 [5] Schmidt, D, Strong unicity and Lipschitz conditions of order $$12$$ for monotone approximations, J. approx. theory, 27, 346-354, (1979) · Zbl 0427.41008
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