摘要
给出二型理想 (two- type ideal)的概念 ,讨论它的一些性质 ,及与理想相联系的格林等价关系(Green’s equivalence relations )下的各种理想的逼近 (approximation)问题。
In this short note, a new notion of two-type ideal in semi-groups is proposed. Some properties at roughly approximation problems connected with a two-type ideal with respect to Green's equivalence relation are discussed.
出处
《模糊系统与数学》
CSCD
2003年第2期74-76,共3页
Fuzzy Systems and Mathematics
