T—凸距离空间内非扩张型映射的不动点

Fixed Points of Nonexpansive Type Mappings in T-convex Metric spaces

Takahashi在距离空间内引入了凸性概念,推广了banach空间内非扩张映射的某些不动点定理。其后有许多作者研究了T—凸距离空间和不动点问题,见[2—4]。

In this paper, we give a characterization of the conven hull of any et in T-convex metric spaces. Then Jaggi's results on nonexpansive type mappings n Banach spaces are generalized to T-convex metric spaces.