01153nam2-2200337li-450-99000324662020331620090518115047.0000324662USA01000324662(ALEPH)000324662USA010003246622002009051891975----y0itay0103----baengUSIntroduction to spectral theory: selfadjoint ordinary differential operatorsB. M. Levitan, I. S. SargsjanProvidenceAmerican Mathematical Societycopyr. 1975XI, 525 p.ill.23 cmTranslations of mathematical monographs390010003246432001Translations of mathematical monographs39Operatori differenziali515.722LEVITAN,B. M.48792SARGSJAN,I. S.754678itasalbcISBD990003246620203316515 TMM (39)6869/CBS51500220705BKSCIRSIAV79020090518USA011150Introduction to spectral theory: selfadjoint ordinary differential operators1518747UNISA