摘要
给出了半导集为半闭集的一个充要条件，并讨论了它的应用。
It is advanced that Semi-derivable is a sufficient and necessary condition of semiclosed set and its applications are also discussed in this article.
出处
《湖南商学院学报》
1999年第5期83-84,共2页
Journal of Hunan Business College
关键词
半导集
半闭包
充分必要条件
Semi-derivable, Semi-Cosed set, sufficient and necessary condition
