TY - JOUR AU - A. E. Andreev TI - The complexity of the realization of subdefinite matrices by gate schemes JO - Matematičeskie zametki PY - 1987 SP - 77 EP - 86 VL - 41 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1987_41_1_a8/ LA - ru ID - MZM_1987_41_1_a8 ER -