Tohoku Mathematical Journal, Second Series
Online ISSN : 2186-585X
Print ISSN : 0040-8735
ISSN-L : 0040-8735
THE DEGREE OF THE BEST APPROXIMATION IN BANACH SPACES
TOSHIHIKO NISHISHIRAHO
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1994 Volume 46 Issue 1 Pages 13-26

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Abstract
Direct theorems of Jackson type on estimating the degree of the best approximation in Banach spaces are obtained by means of the moduli of continuity of higher orders of elements having certain smoothness properties.
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