The completeness of eigenfunctions of perturbation connected with Sturm-Liouville operators (Q2461316)

The authors study boundary conditions for the operator \[ -(d/dx)(p(x)d/dx)+q(x) \] on the half-line, generalizing the results of \textit{B. P. Allahverdiev} and \textit{A. Canoglu} [Proc. R. Soc. Edinb., Sect. A, Math. 127, No.~6, 1113--1121 (1997; Zbl 0901.47001)] for the case \(p=1\).