problem of fixed points

• 不动点问题

problem of fixed points的用法和样例：

例句

1. Several fixed theorems for multivalued increasing operators are obtained, and the obtained results extend and improve the related known works in the literature.
   摘要研究了一个多值增算子的不动点问题，获得了几个存在性定理，所获结果推广了已知的结论。