Symmetry, Vol. 15, Pages 1920: New Results on the Oscillation of Solutions of Third-Order Differential Equations with Multiple Delays

Symmetry, Vol. 15, Pages 1920: New Results on the Oscillation of Solutions of Third-Order Differential Equations with Multiple Delays

Symmetry doi: 10.3390/sym15101920

Authors: Najiyah Omar Osama Moaaz Ghada AlNemer Elmetwally M. Elabbasy

This study aims to examine the oscillatory behavior of third-order differential equations involving various delays within the context of functional differential equations of the neutral type. The oscillation criteria for the solutions of our equation have been obtained in this study to extend and supplement existing findings in the literature. In this study, a technique that relies on repeatedly improving monotonic properties was used in order to exclude positive solutions to the studied equation. Negative solutions are excluded based on the symmetry between the positive and negative solutions. Our results are important because they become sharper when applied to a Euler-type equation as compared to previous studies of the same equation. The significance of the findings was illustrated through the application of these findings to specific cases of the investigated equation.