Oscillatory behaviour of third order nonlinear differential equations with a nonlinear nonpositive neutral term
2019
Grace, Said R. | Graef, John R. | Tunç, Ercan
The authors present some new oscillation criteria for third order nonlinear differential equations with a nonlinear nonpositive neutral term. The results obtained are new and improve known oscillation criteria appearing in the literature even for equations not having a neutral term. Using comparison methods and integral conditions, the authors obtain five new theorems on the oscillatory behaviour of the solutions. Suggestions for future research are included.
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