TY - JOUR AU - S. P. Baiborodov TI - Approximation of functions by Fourier sums in systems of characters of zero-dimensional compact commutative groups JO - Informatics and Automation PY - 1989 SP - 21 EP - 33 VL - 189 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_1989_189_a1/ LA - ru ID - TRSPY_1989_189_a1 ER -