Basicity Properties of Eigenfunctions of the Periodic Problem for Differential Operator Lu= -u'(-x) + q(x)u(x)

摘要

In this paper, questions of the basis property of the system of eigenfunctions of the periodic problem for the operator Lu= -u"(-x) + q(x)u(x) are considered. We have constructed the Green's function of the problem under consideration. A theorem on equiconvergence is proved.