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On a deficiency index theorem of W. N. Everitt

  • A. Devinatz
Invited Lectures
Part of the Lecture Notes in Mathematics book series (LNM, volume 415)

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References

  1. 1.
    A. Devinatz, Positive definite fourth-order differential operators, J. London Math. Soc. (2), 6(1973), 412–416.MathSciNetCrossRefzbMATHGoogle Scholar
  2. 2.
    W. D. Evans, On non-integrable square solutions of a fourth-order differential equation and the limit-2 classification, To appear in J. London Math. Soc.Google Scholar
  3. 3.
    W. N. Everitt, Some positive definite differential operators, J. London Math. Soc. 43 (1968), 465–473.MathSciNetCrossRefzbMATHGoogle Scholar
  4. 4.
    M. A. Naimark, Linear Differential Operators, GITTL, Moscow 1954; English transl. Ungar, New York, part I, 1967; part II, 1968.zbMATHGoogle Scholar

Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • A. Devinatz

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