Point-Wise Summability Of Fourier Series And Its Related Series In The Norlund Sense
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In this note we consider the point-wise summability of Fourier series in the Norlund sense by extending a theorem of Lebesgue [ 6 ] . We also consider analogous theorems of our extension to derived Fourier series, and conjugate Fourier series. We finally prove some general theorem on the above topic.