Publication details

Sturmian comparison theorems for completely controllable linear Hamiltonian systems in singular case

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Year of publication 2020
Type Article in Periodical
Magazine / Source Journal of Mathematical Analysis and Applications
MU Faculty or unit

Faculty of Science

Web Full text
Keywords Sturmian comparison theorem; linear Hamiltonian system; Focal point; Complete controllability; principal solution; Sturm-Liouville equation
Description In this paper we consider two linear Hamiltonian differential systems on an open unbounded interval. We assume that the systems are completely controllable and satisfy the Sturmian majorant condition and the Legendre condition. We derive a singular Sturmian comparison theorem for the case when the minorant system has a solution, which is principal at both endpoints of the considered interval. The main result is new even for the second order differential equations and it generalizes the singular comparison theorem obtained by Aharonov and Elias (2010). We illustrate our new theory by several examples.
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