TY - JOUR AU - V. A. Il'in TI - Necessary and sufficient conditions for spatial decompositions to be bases and to be equiconvergent with a trigonometric series.~II JO - Differencialʹnye uravneniâ PY - 1980 SP - 980 EP - 1009 VL - 16 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1980_16_6_a1/ LA - ru ID - DE_1980_16_6_a1 ER -