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The author has great pleasure in taking this opportunity of expressing his warmest thanks to Professor B. N.Prasad and Dr. S. N.Bhatt for their generous encouragement and helpful suggestions.
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Lal, S.N. On the absolute Nörlund summability of a Fourier series. Arch. Math 15, 214–221 (1964). https://doi.org/10.1007/BF01589189
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DOI: https://doi.org/10.1007/BF01589189