Best Approximation by Periodic Smooth Fu
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J.A. Oram; V. Davydov
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Article
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1998
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Elsevier Science
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English
β 575 KB
Let W n be the set of 2?-periodic functions with absolutely continuous (n&1)th derivatives and nth derivatives with essential suprema bounded by one. Let n>1. Best uniform approximations to a periodic continuous function from W n are characterized. The result depends upon an analysis of the relatio