OSCILLATION CRITERIA OF SOLUTIONS FOR A CLASS OF DELAY DIFFERENTIAL EQUATIONS WITH POSITIVE AND NEGATIVECOE FFICIENTS  

作　　者：关开中 王奇生 廖基定 

机构地区：[1]Dept.of Math.and Physics,Nanhua University,Hengyang 421001 [2]Dept.of Math.and Physics,Nanhua University,Hengyang 421001ome 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.

出　　处：《Annals of Differential Equations》2004年第3期235-242,共8页微分方程年刊（英文版）

基　　金：Project supported by Scientific Research Fund of Hunan Provincial Education Department (China)(granted 03C427).

摘　　要：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.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.

关 键 词：positive and negative coefficients delay differential equation OSCILLATION 

分 类 号：O175[理学—数学]