fixed point of mapping的用法和樣例：
例句
- This paper discusses the existence of multiple positive solutions of a class of nonlinear singular boundary value problems by means of the fixed point index Theorem on cones.
摘要利用錐映射的不動點指數定理，研究了一類非線性奇異邊值問題多個正解的存在性問題。 - 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。
