摘要
研究Pawlak代数(L,∧,∨,c,apr,apr)中下,上方逼近算子apr和apr的性质,利用它们构造F格L上的各种二元关系,探讨这些二元关系成为等价关系的条件,得到若干结果.
We study some properties of upper(lower) approximate operator in Pawlak algebra and gave some binary relations on F-lattice L by upper (lower) approximate operator. The equivalence relation deduced by upper (lower) approximate operator is discussed.
出处
《大学数学》
2009年第6期52-57,共6页
College Mathematics
关键词
F格
Pawlak代数
下
上方逼近算子
等价关系
Pawlak algebra
F-lattice
upper(lower) approximate operator
equivalence relation