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Approximation of smooth functions and covering properties of sets. (English) Zbl 0325.41018
MSC:
41A30 Approximation by other special function classes
41A65 Abstract approximation theory (approximation in normed linear spaces and other abstract spaces)
28A10 Real- or complex-valued set functions
46E15 Banach spaces of continuous, differentiable or analytic functions
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References:
[1] E.A. Coddington - N. Levinson , Theory of Ordinary Differential Equations , McGraw-Hill , New York , 1955 . MR 69338 | Zbl 0064.33002 · Zbl 0064.33002
[2] R. Kaufman , Metric properties of some planar sets , Colloq. Math. , 23 ( 1971 ), pp. 117 - 120 . MR 316663 | Zbl 0218.28002 · Zbl 0218.28002
[3] G.G. Lorentz , Approximation of Functions , Holt , New York , 1966 . MR 213785 | Zbl 0153.38901 · Zbl 0153.38901
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