01043nam a2200301 i 450099100108396970753620020507111035.0970308s1972 us ||| | eng b10171356-39ule_instLE00641873ExLDip.to Fisicaita510.46510.47515'.64QA316Weinstein, A.462853Methods of intermediate problems for Eigenvalues :theory and ramifications /A. Weinstein and W. StengerNew York :Academic Press,1972xi, 236 p. ;24 cm.Calculus of variationsEigenvaluesStenger, W..b1017135621-09-0627-06-02991001083969707536LE006 510.46+510.47 WEI12006000022484le006-E0.00-l- 00000.i1021011827-06-02Methods of intermediate problems for Eigenvalues189802UNISALENTOle00601-01-97ma -engus 01