摘要
讨论了A={1,2,3…n}集合上子集格的D-类的一些性质,并刻划了子集格上的Munn半群。
At present paper, the eharater of D - class in the sublattee of set A = {1,2,3…n} was discussed, and Mtmn semigroup was characterized in the lattice of subset.
出处
《青海大学学报（自然科学版）》
2005年第6期52-55,共4页
Journal of Qinghai University(Natural Science)
关键词
格
n次对称群
幂等元
lattice
symmetric group on n letters
idempatent
