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On singular differential operators with positive coefficients. (English) Zbl 0767.34058

This paper gives a result concerning the deficiency index of singular differential operators and proves partially a conjecture of McLeod.
Reviewer: D.Robert (Nantes)

MSC:

34L05 General spectral theory of ordinary differential operators
47E05 General theory of ordinary differential operators
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References:

[1] DOI: 10.1007/BF01474161 · JFM 41.0343.01
[2] DOI: 10.1016/0001-8708(90)90069-Y · Zbl 0821.47037
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[4] DOI: 10.1112/plms/s3-35.3.496 · Zbl 0382.47025
[5] Paris, Proc. Roy. Soc. Edinburgh Sect. A 90 pp 209– (1981) · Zbl 0483.34014
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