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Eigenvalue problems for the equation \(Ly+\lambda p(x)y=0\). (English) Zbl 0369.34008


MSC:

34L99 Ordinary differential operators
34B10 Nonlocal and multipoint boundary value problems for ordinary differential equations
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[9] Krein, M., Les théorèmes d’oscillation pour les opérateurs linéaires différentiels d’ordre quelconque, C. R. (Doklady) Acad. Sci. URSS (N.S.), 25, 719-722 (1939) · JFM 65.1266.01
[10] Leighton, W.; Nehari, Z., On oscillation of solutions of self adjoint linear differential equations of the fourth order, Trans. Amer. Math. Soc., 89, 325-377 (1958) · Zbl 0084.08104
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