S-粗集的副集η-嵌入与η-嵌入定理  

η-Embedding and η-embedding theorem of assistant of S-rough sets

作　　者：胡海清[1] 王洪凯[1] 

机构地区：[1]山东大学数学与系统科学学院,山东济南250100

出　　处：《山东大学学报（理学版）》2004年第3期49-52,58,共5页Journal of Shandong University(Natural Science)

基　　金：国家自然科学基金资助项目(70271048);山东省自然科学基金资助项目(Y2001G07)

摘　　要：利用S-粗集,定义了单向S-粗集的副集 η-嵌入,双向S-粗集的副集μ△γ-嵌入的概念;给出单向S-粗集的副集η-嵌入的特性,双向S-粗集的副集μ△γ-嵌入的特性;提出单向S-粗集的副集η-嵌入定理,双向S-粗集的副集μ△γ-嵌入定理.Using S-rough sets, define η-embedding of assistant set of one direction S-rough sets, μ△γ-embedding of assistant set of two direction S-rough sets; give characteristics of η-embedding of assistant set of one direction S-rough sets and μ△γ-embedding of assistant set of two direction S-rough sets; put forward η-embedding theorem of assistant set of one direction S-rough sets, μ△γ-embedding theorem of assistant set of two direction S-rough sets.

关 键 词：单向S-粗集 双向S-粗集 副集 η-嵌入集 η-嵌入定理 

分 类 号：O159[理学—数学]