00868nam0 2200253 450 00001933120081114125611.0354090666520081114d1982----km-y0itay50------baengUSy-------001yy<<A >>short introduction to perturbation theory for linear operatorsTosio KatoNew YorkSpringer1982XIII, 161 p.25 cm<<A >>short introduction to perturbation theory for linear operators34040PerturbazioneMatematica515.724 620Operatori lineariKato,Tosio40573ITUNIPARTHENOPE20081114RICAUNIMARC000019331M 515.724 6/1M 746DSA2008Short introduction to perturbation theory for linear operators34040UNIPARTHENOPE