The reviewer observes that the statement of the given theorem is not complete since the conditions on , and are missing. Also the authors claim to get an estimate for in -norm which is really never used in the proof, where are almost Nörlund means of the Fourier series of at . In fact, they have tried to get an estimate for for all by assuming conditions, which seem to be in non-existence.
Surprisingly they assume but they mention on page 40, line 7, that , where . Unfortunately whatever they have proved is also not correct since on page 40, lines 5-6 from bottom
Also the paper contains a number of misprints.