Some sufficient conditions for the oscillation of all solutions of the delay differential equations with positive and negative coefficientsare obtained, where 0 < αi, βi <1,pi>, qi >, are constants, t = ...Some sufficient conditions for the oscillation of all solutions of the delay differential equations with positive and negative coefficientsare obtained, where 0 < αi, βi <1,pi>, qi >, are constants, t = 1,2, …, n.展开更多
基金Project supported by Scientific Research Fund of Hunan Provincial Education Department (China)(granted 03C427).
文摘Some sufficient conditions for the oscillation of all solutions of the delay differential equations with positive and negative coefficientsare obtained, where 0 < αi, βi <1,pi>, qi >, are constants, t = 1,2, …, n.
