01154nam0-2200361li-450 99000026375020331620180312154842.00026375USA010026375(ALEPH)000026375USA01002637520001109d1964----km-y0itay0103----baengNEPositive solutions of operator equationsM.A. Krasnosel'skiitranslated from the Russian by Richard E. Flahertyedited by Leo F. BoronGroningenNoordhoff1964381 p.22 cmoperatori differenziali515724Teoria degli operatoriKrasnosel'skii,M.A.745850Boron,Leo F.Flaherty,Richard E.Sistema bibliotecario di Ateneo dell' Università di SalernoRICA990000263750203316515.724 KRA0005613BKSCI1990071820001110USA01171520020403USA011634PATRY9020040406USA011619Positive solutions of operator equations1487912UNISA