TY - JOUR AU - M. I. Kanovitch TI - On the complexity of approximation of arithmetic sets JO - Doklady Akademii Nauk PY - 1973 SP - 1038 EP - 1041 VL - 211 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1973_211_5_a6/ LA - ru ID - DAN_1973_211_5_a6 ER -