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100   $a20030513d1977----km-y0itay0103----ba
101 0 $aeng
102   $aDE
200 1 $a<<The>> deficiency index problem for powers of ordinary differential expressions$fRobert M. Kauffman, Thomas T. Read, Anton Zettl
210   $aBerlin [etc.]$cSpringer$d1977
215   $aVI, 112 p.$d25 cm.
225 2 $aLecture notes in mathematics$v621
410  0$12001$aLecture notes in mathematics
606   $aEquazioni differenziali
606   $aOperatori differenziali
676   $a515.35$v(21. ed.)$9Equazioni differenziali
691   $a34B20$9Ordinary differential equations. Boundary value problems. Weyl theory and its generalizations
691   $a47E05$9Operator theory. Ordinary differential operators
700  1$aKauffman,$bRobert M.$0438332
701  1$aRead,$bThomas T.$048156
701  1$aZettl,$bAnton$048157
801  0$aIT$bUniversità della Basilicata - B.I.A.$gRICA$2unimarc
912   $a000013227
996   $aDeficiency index problem for powers of ordinary differential expressions$980798
997   $aUNIBAS
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