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Maintenance of oscillations under the effect of a periodic forcing term. (English) Zbl 0234.34040


MSC:

34C10 Oscillation theory, zeros, disconjugacy and comparison theory for ordinary differential equations
34C25 Periodic solutions to ordinary differential equations
Full Text: DOI

References:

[1] A. G. Kartsatos, On oscillation of solutions of even order nonlinear differential equations, J. Differential Equations 6 (1969), 232 – 237. · Zbl 0193.05705 · doi:10.1016/0022-0396(69)90014-X
[2] -, Contributions to the research of the oscillation and the asymptotic behaviour of solutions of ordinary differential equations, Doctoral Dissertation, University of Athens; Bull. Soc. Math. Grèce 10 (1969), 1-48.
[3] Athanassios G. Kartsatos, On the maintenance of oscillations of \?th order equations under the effect of a small forcing term, J. Differential Equations 10 (1971), 355 – 363. · Zbl 0216.11504 · doi:10.1016/0022-0396(71)90058-1
[4] Gerald H. Ryder and David V. V. Wend, Oscillation of solutions of certain ordinary differential equations of \?\?\? order, Proc. Amer. Math. Soc. 25 (1970), 463 – 469. · Zbl 0201.12102
[5] James S. W. Wong, On second order nonlinear oscillation, Funkcial. Ekvac. 11 (1968), 207 – 234 (1969). · Zbl 0184.12202
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