TY - JOUR AU - GH. Mocanu TI - The joint approximate spectrum of a finite system of elements of a C*-algebra JO - Studia Mathematica PY - 1973 SP - 253 EP - 262 VL - 49 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/sm-49-3-253-262/ DO - 10.4064/sm-49-3-253-262 LA - en ID - 10_4064_sm_49_3_253_262 ER -