摘要
设f是可降的二维自映射,给出了这类自映射某些集合的导集与闭包及其它们之间的关系。
Let f be a descendable continuous self-mapping of the square. This paper gives the derived set and closure of the class self-mappings.
出处
《重庆师范学院学报(自然科学版)》
1996年第2期64-67,共4页
Journal of Chongqing Normal University(Natural Science Edition)
关键词
导集
闭包
可降映射
自映射
derived set, closure, descendable mapping