摘要
本文利用上、下解方法讨论了几类n阶常微分方程三、四点非线性边值问题解的存在性和唯一性。
This paper proves the existences and uniqueness of solutions to three and four point boundary value problems of nth-order nonlinear differential equations by the upper-lower solution method.
关键词
边值问题
上下解
存在唯一性
N阶常微分方程
boundary value problem
Upper and Lower solution
existence and uniqueness.