On $pi$-images of metric spaces
[摘要] In this paper, we prove that sequence-covering, $pi$-images of metric spaces and spaces with a $sigma$-strong network consisting of fcs-covers are equivalent. We also investigate $pi$-images of separable metric spaces.
[发布日期] [发布机构]
[效力级别] [学科分类] 数学（综合）
[关键词] fcs-cover [时效性]
