We obtain the exact order of deviations of Fejér sums on the class of continuous functions. This order is determined by a given majorant of the best approximations.
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Translated from Ukrains’kyi Matematychnyi Zhurnal, Vol. 62, No. 8, pp. 1149–1152, August, 2010.
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Tovkach, R.V. Approximation of some classes of periodic functions of many variables. Ukr Math J 62, 1339–1343 (2011). https://doi.org/10.1007/s11253-011-0434-y
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DOI: https://doi.org/10.1007/s11253-011-0434-y