A Survey on the Oscillation of First-Order Retarded Differential Equations

Abstract

In this paper, a survey of the most interesting conditions for the oscillation of all solutions to first-order linear differential equations with a retarded argument is presented in chronological order, especially in the case when well-known oscillation conditions are not satisfied. The essential improvement and the importance of these oscillation conditions is also indicated.

Keywords

• oscillation
• retarded differential equations