00974nam0-22003371i-450-9900014330004033213-540-63136-4000143300FED01000143300(Aleph)000143300FED0100014330020000920d1997----km-y0itay50------baengPertubation theory for the Schrodinger operator with a periodic potentialYulia E. KarpeshinaBerlinSpringer-Verlag1997vii, 352 p.25 cmLecture Notes in Mathematics1663PertubazioniFisica matematica515.7242ITUNINARICAUNIMARCBK990001433000403321C-20-(166315467MA1MA135A3535B2035B27Pertubation theory for the Schrodinger operator with a periodic potential374782UNINAING01