The discreteness of the spectrum of selfadjoint, even order, one-term, differential operators

Academic Article


  • An open question which was asked by I. M. Glazman is answered. It is well known that the conditionlim x2"'1 r-1 = 0X.00 J Xis sufficient for the discreteness and boundedness from below of thespectrum of selfadjoint extensions of (l)n(ry- This papershows that the condition is also necessary. © 1974 American Mathematical Society.
  • Authors

    Digital Object Identifier (doi)

    Author List

  • Lewis RT
  • Start Page

  • 480
  • End Page

  • 482
  • Volume

  • 42
  • Issue

  • 2