Pointwise error estimates for trigonomet
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Peter Henrici
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Article
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1982
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Elsevier Science
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English
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An estimate due to Gaier [2] for the error committed in replacing a periodic function f by an interpblating trigonometric polynomial is sharpened in such a way that the estimate makes evident the interpolating property of the polynomial. A similar improvement is given for Gaier's estimate of the dif