Kritskov, L.V.; Sadybekov, M.A; Sarsenbi, A.M.
(Ye.A.Buketov Karaganda State University Publ., 2018-09-29)
For the spectral problem -u"(x) + au"(—x) = \u(x), —1 < x < 1, with nonlocal boundary conditions u(—1) = /3u( 1), u'(—1) = u'(1), where a € (—1,1), в2 = 1, we study the spectral properties. We show that If r = ^/(1 — a)/(1 ...