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Criteria for Discrete Spectrum of Singular Selfadjoint Differential Operators

L. W. Rollins
Proceedings of the American Mathematical Society
Vol. 34, No. 1 (Jul., 1972), pp. 195-200
DOI: 10.2307/2037927
Stable URL: http://www.jstor.org/stable/2037927
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Criteria for Discrete Spectrum of Singular Selfadjoint Differential Operators
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Abstract

Under certain conditions on the coefficients of symmetric singular differential operators of order $2n$, selfadjoint extensions are shown to have a discrete spectrum. The results are proven specifically for the Friedrichs extension.

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