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On Estimates of Deviation of Functions from Matrix Operators of Their Fourier Series by Some Expressions withr-Differences of the Entries
We generalize the results of Krasniqi 2012 and Wei and Yu 2012 to the case of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mrow><mml:mi>r</mml:mi></mml:mrow></mml:math>-differences.