00935nam0-22003131i-450-99000044982040332120070730151446.03-540-07558-5000044982FED01000044982(Aleph)000044982FED0100004498220020821d1984----km-y0itay50------baenga-------001yyPerturbation theory for linear operatorsTosio Kato2nd corrected printing of the 2nd ed.Berlin ; HeidelbergSpringer-Verlag1984619 p.ill.23 cm<<Die >>Grundlehren der mathematischen Wissenschaften132Operatori lineariPerturbazione (Matematica)515.724'6Kato,TosioITUNINARICAUNIMARCBK99000044982040332110 D III 4681529 DISDINELDINELUNINA