[Authors] S. N. Pakhomov, O. V. Prosekov [Title] Calculation aspects of fast Fourier transform [AMS Subj-class] 65T50 Discrete and fast Fourier transforms [Abstract] The Cooley-Tukey algorithm for fast Fourier transform related to subsampling in time is considered. Effective algorithms for calculation of reverses and complex exponents are proposed. [Comments] Russian, 9 pp. [Contact e-mail] sergeypakhomov@mail.ru