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Summability criteria for oscillation of second order linear differential equations. (English) Zbl 0183.37001


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[1] Coles, W. J., An oscillation criterion for second-order linear differential equations, Proc. Amer. Math. Soc., 19, 755-759 (1968) · Zbl 0172.11702 · doi:10.2307/2035877
[2] Fite, W. B., Concerning the z-ros of the solutions of certain differential equations, Trans. Amer. Math. Soc., 19, 341-352 (1918) · JFM 46.0702.02 · doi:10.2307/1988973
[3] G. H. Hardy,Divergent Series, Oxford University Press, 1949. · Zbl 0032.05801
[4] Hartman, P., On nonoscillatory linear differential equations of second order, Amer. J. Math., 74, 389-400 (1952) · Zbl 0048.06602
[5] D. Willett,On the oscillatory behavior of the solutions of second order linear differential equations, Annales Polonici Math., 21 (1968). · Zbl 0162.39101
[6] Wintner, A., A criterion of oscillatory stability, Quart. Appl. Math., 7, 115-117 (1949) · Zbl 0032.34801
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