TY - JOUR AU - B. G. Gabdulkhaev TI - Approximate numbers of linear operators and optimization of approximate methods for solving functional equations JO - Konstruktivnaya Teoriya Funktsii i Funktsional'nyi Analiz PY - 1985 SP - 15 EP - 26 VL - 5 IS - 5 UR - http://geodesic.mathdoc.fr/item/KUKTF_1985_5_5_a1/ LA - ru ID - KUKTF_1985_5_5_a1 ER -