Abstract
We shall present new oscillation criteria of second-order nonlinear differential equations with a nonpositive neutral term of the form:
with positive coefficients. The obtained results answer an open problem raised in Li et al. [Adv Differ Equ 35:7, 2015, Remark 4.3 (P2)]. Examples are given to illustrate the main results.
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Grace, S.R. Oscillatory Behavior of Second-Order Nonlinear Differential Equations with a Nonpositive Neutral Term. Mediterr. J. Math. 14, 229 (2017). https://doi.org/10.1007/s00009-017-1026-3
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DOI: https://doi.org/10.1007/s00009-017-1026-3