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二阶非齐次泛函微分方程的极限圆型的判定
On The Limit Circle Criterion of A Class of Nonhomogeneous Linear Functional Differential Equations of Second Order
【摘要】 本文研究下列二阶非齐次泛函微分方程(r(t)x'(t))'+p(t)x'(t)+q1(t)x(t)+q2(t)x(t-τ)=f(t)(E)的极限圆型,借助辅助泛函和两个重要不等式技巧,获得了保证方程(E)属于极限圆型的判别准则.
【Abstract】 This paper considers the following nonhomogereous linear functional equation (r(t)x’(t))’+p(t)x’(t)+q1(t)x(t)+q2(t)x(t-τ)=f(t)(E)with the aid of auxiliary functionals and inequalities.We obtain some sufficient conditions under which equation(E)belongs to the L.S.L.C.
【关键词】 泛函微分方程;
泛函;
极限圆型;
拉格朗日稳定;
【Key words】 functional differential equation; functional; Limit circle; Lagrange stable;
【Key words】 functional differential equation; functional; Limit circle; Lagrange stable;
【基金】 学院青年基金
- 【文献出处】 广东工学院学报 , 编辑部邮箱 ,1995年02期
- 【分类号】O177.92
- 【下载频次】19