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1. CMB 1998 (vol 41 pp. 23)

Clemence, Dominic P.
 Subordinacy analysis and absolutely continuous spectra for Sturm-Liouville equations with two singular endpoints The Gilbert-Pearson characterization of the spectrum is established for a generalized Sturm-Liouville equation with two singular endpoints. It is also shown that strong absolute continuity for the one singular endpoint problem guarantees absolute continuity for the two singular endpoint problem. As a consequence, we obtain the result that strong nonsubordinacy, at one singular endpoint, of a particular solution guarantees the nonexistence of subordinate solutions at both singular endpoints. Categories:34L05, 34B20, 34B24

2. CMB 1997 (vol 40 pp. 416)

Clemence, Dominic P.
 On the singular behaviour of the Titchmarsh-Weyl $m$-function for the perturbed Hill's equation on the line For the perturbed Hill's equation on the line,  -\frac{d^2y}{dx^2}+ [P (x) +V (x )] y=Ey,\quad -\infty Categories:34L05, 34B20, 34B24
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