Comments on "A two-stage representation of DFT and its applications" by O.K. Ersoy

In the above named paper (ibid., vol.ASSP-35, p.825-831), Ersoy developed a two-stage representation in terms of processing and postprocessing of a discrete Fourier transform (DFT) by vector transformation of sines and cosines into new basis functions using Mobius inversion of number theory. Three corrections of Ersoy's work are printed out.<
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