On the Existence of Positive Solutions ofSingular Second Order BoundaryValue Problems

• 作 者: LIHe-cheng
• 机 构: DepartmentofMathematics
• 出 处: 数学季刊：英文版
• 发表日期: 2004年1期
• 关键词: 边界线 评估 边值问题 定点计算 boundary value problem positive soulution fixed point existe

This paper deals with the existence of positive solutions of the equation u'+f(t,u)=0 with linear boundary conditions. We show the existence of at least onepositive solution if f is neither superlinear nor sublinear on u by a simple application of afi