摘要
在闭集格(或分子生成格)中引入了F-覆盖,F-恰当覆盖及F-极小集等概念,得到了与完全分配格类似的一些结论:(1)完备格L成为闭集格的一个充分必要条件是L的每一个元都有F-极小集;(2)闭集格L中的F-极小集都是下集;(3)F-极小映射是保F-并映射.
The notions of F-covers, F-right covers and F-minimal sets are introduced in the closed-set lattice (or moleculely generated lattice), and the following conclusions which are similar to the completely distributive lattice are proved that: (1) Complete lattice L becomes closed-set lattice if and only if every elment of L has F-minimalsets ; (2) F-minimal sets of closed-set lattice are all lower set; (3)F-minimal- mapping preserves F-join.
出处
《纺织高校基础科学学报》
CAS
2007年第2期118-121,共4页
Basic Sciences Journal of Textile Universities
基金
西安工程大学校管科研资助项目(2006XG40)