sn-network相关论文
In this paper, spaces with a locally countable sn-network are discussed. It is shown that a space with a locally countab......
本文引进sn开映射，利用它把一类sn第一可数空间刻画为度量空间在不同sn开映射下的象，并给出sn开映射与1序列覆盖映射之间的关系．......
