TY - JOUR AU - Yu. Abramov TI - On the geometric properties of the joint spectrum of a family of self-adjoint operators JO - Studia Mathematica PY - 1977 SP - 55 EP - 62 VL - 61 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/sm-61-1-55-62/ DO - 10.4064/sm-61-1-55-62 LA - en ID - 10_4064_sm_61_1_55_62 ER -