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Information × Registration Number 0207U006004, 0104U003693 , R & D reports Title Extremal problems of approximation theory of functions of rial and complex variables popup.stage_title Head Vakarchuk Sergey Borisovich, Registration Date 02-03-2007 Organization Ukrainian academy of customs popup.description2 Exact values of extrence haracteristics of special type that connect the values of best polynomial approximations and modulus of contimity of order k are found. Exact upper bounds of Fourier-Haar coefficient modules of certain classes of functions of one several variables are calculated. Exact constants are established in Jackson - type inequalities under the best approximation of functions by trigonometric polynomials in the space L2. Product Description popup.authors popup.nrat_date 2020-04-02 Close