An exact constant on the estimation of the approximation error of classes of differentiable functions by the second-order Cesaro means
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2004 ◽
Vol 21
(2)
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pp. 439-448
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1994 ◽
Vol 76
(1)
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pp. 31-53
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1972 ◽
Vol 168
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pp. 233-233
1972 ◽
Vol 71
(2)
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pp. 335-341
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