TY - JOUR AU - V. V. Vasin AU - V. P. Tanana TI - Necessary and sufficient conditions for convergence of projection methods for linear unstable problems JO - Doklady Akademii Nauk PY - 1974 SP - 1032 EP - 1034 VL - 215 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1974_215_5_a2/ LA - ru ID - DAN_1974_215_5_a2 ER -