00838nam0-22002891i-450-990002571670403321000257167FED01000257167(Aleph)000257167FED0100025716720000920d1964----km-y0itay50------baENG<<The >>principles and applications of variational methodsMartin Becker.CambridgeM.I.T. Press1964.viii, 120 p.25 cmResearch monograph27Calcolo delle variazioni516Becker,Martin104503ITUNINARICAUNIMARCBK990002571670403321MXVI-A-21037044MASMASPrinciples and applications of variational methods436415UNINAING01