01082nam0-22003731i-450-99000120334040332120090225133252.0000120334FED01000120334(Aleph)000120334FED0100012033420001205d1974----km-y0itay50------baengUSa-------001yyVariational methods for eigenvalue approximationHans F. WeinbergerPhiladelphiaSIAM©1974160 p.ill.25 cmRegional conference series in applied mathematics15Calcolo delle variazioniCalcolo differenzialeEquazioni differenziali515.3Weinberger,Hans F.40586ITUNINARICAUNIMARCBK9900012033404033215-L-3619196MA110 B II 429L/11 CNRDINELMA1DINEL49-06Variational methods for eigenvalue approximation343553UNINA