three -order derivatives的用法和樣例：
例句
- Aim In order to develop and improve the fixed point theorem in metric space and extend the application.
摘要目的為了進一步發展和完善度量空間中的不動點理論，擴展不動點定理的應用範圍。 - This paper studies the existence of monotone positive solutions to a type of three point boundary value problems of nonlinear second-order differential equations.
摘要利用范數形式的錐上不動點定理，研究了一類二階微分方程三點邊值問題單調正解的存在性。
