Improved Conditions for Oscillation of Functional Nonlinear Differential Equations

Omar Bazighifan and Mihai Postolache
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Omar Bazighifan: Department of Mathematics, Faculty of Science, Hadhramout University, Hadhramout 50512, Yemen
Mihai Postolache: Center for General Education, China Medical University, Taichung 40402, Taiwan

Mathematics, 2020, vol. 8, issue 4, 1-10

Abstract: The aim of this work is to study oscillatory properties of a class of fourth-order delay differential equations. New oscillation criteria are obtained by using generalized Riccati transformations. This new theorem complements and improves a number of results reported in the literature. Some examples are provided to illustrate the main results.

Keywords: oscillatory solutions; nonoscillatory solutions; fourth-order; delay differential equations; riccati transformation (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2020
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