Abstract
In this article, we establish some new criteria for the oscillation of fourth-order nonlinear delay differential equations of the form
provided that the second-order equation
is nonoscillatory or oscillatory.
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This research is supported by the Natural Science Foundation of China (61374074, 61374002), Natural Science Outstanding Youth Foundation of Shandong Province (JQ201119) and supported by Shandong Provincial Natural Science Foundation (ZR2012AM009, ZR2013AL003).
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Grace, S.R., Sun, S. & Akın, E. Oscillation Criteria for Certain Fourth-Order Nonlinear Delay Differential Equations. Mediterr. J. Math. 13, 2383–2396 (2016). https://doi.org/10.1007/s00009-015-0630-3
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DOI: https://doi.org/10.1007/s00009-015-0630-3