Wu, HongwuChen, ChurongZhuang, Rongkun2022-05-022022-05-022017-05-10Wu, H., Chen, C., & Zhuang, R. (2017). Oscillation criterion for first-order delay differential equations with sign-changing coefficients. <i>Electronic Journal of Differential Equations, 2017</i>(126), pp. 1-9.1072-6691https://hdl.handle.net/10877/15728We establish conditions so that all solutions to a first-order linear delay differential equation become oscillatory. The coefficients of this equation are allowed to have negative and positive values, which is an expansion of the results in the references. To illustrate our results we present two examples.Text9 pages1 file (.pdf)enAttribution 4.0 InternationalOscillatory solutionDelay differential equationVariable delayArticle