摘要
本文利用林寿引入的Frechet拟基的概念,获得了度量空间的确定闭映象和局部可度量空间的确定闭映象的一些新的刻画,
In this paper the concept of Frechet quasi-base, which is introduced by Lin Shou, is used, some new characterizations of the certain closed images of metric spaces and locally separable metric spaces arc obtained,
基金
福建省教育厅科研基金资助项目(K20106)
