运用Riccati变换技术,研究了二阶具混合非线性时滞微分方程的振动性,给出了该类方程所有解振动的三个充分条件,丰富了已有研究结果.
By employing Riccati transformation technique, three sufficient conditions are obtained for oscillation of second-order delay differential equations with mixed nonlinearities. The results in this paper extend some known results.