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  • 1 Faculty of Mathematics, Computer Science and Econometrics, University of Zielona Góra, 65-516 Zielona Góra, ul. Szafrana 4a, Poland
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Abstract

Pointwise estimates of the deviation T n,A,B f(⋅)−f(⋅) in terms of moduli of continuity and w f are proved. Analog results on norm approximation with remarks and corollaries are also given. In the results essentially weaker conditions than those in [2, Theorem 1, p. 437] are used.

  • [1] Aljančič, S., Bojanic, R., Tomić, M. 1969 On the degree of convergence of Fejér–Lebesgue sums L’Enseignement Mathematique XV 2128 Geneva.

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  • [2] Mittal, M. L. 1998 A sufficient condition for F.-effectiveness of the C 1 T-method J. Math. Anal. Appl. 220 434450 .

  • [3] Zygmund, A. 2002 Trigonometric Series Cambridge.

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