(2019) Литвин, О. М.; Литвин, О. Г.; Литвин, О. О.
A method for calculating Fourier coefficients of functions of three variables using tomograms is proposed and
investigated. Earlier Lytvyn O.M. proposed and introduced the method of calculating Fourier coefficients of the function of two variables using integrals of this function along a given system of direct. It is believed that these integrals - projections or projection data arrive from a computer tomograph.