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200 1 $aVariational methods for eigenvalue approximation$fHans F. Weinberger
210   $aPhiladelphia$cSIAM$dİ1974
215   $a160 p.$cill.$d25 cm
225 1 $aRegional conference series in applied mathematics$v15
610 0 $aCalcolo delle variazioni
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610 0 $aEquazioni differenziali
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700  1$aWeinberger,$bHans F.$040586
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996   $aVariational methods for eigenvalue approximation$9343553
997   $aUNINA