Simplified and improved criteria for oscillation of delay differential equations of fourth order

Abstract An interesting point in studying the oscillatory Home behavior of solutions of delay differential equations is the abbreviation of the conditions that ensure the oscillation of all solutions, especially when studying the noncanonical case.Therefore, this study aims to reduce the oscillation conditions of the fourth-order Planner delay differential equations with a noncanonical operator.Moreover, the approach used gives more accurate results when applied to some special cases, as we explained in the examples.