摘要
研究并刻画了任意逆半群S的正规子半群格Subn S和S的最大群同态象S/σ的正规子群格Subn(S/σ)之间的基本关系.证明了Brandt半群S的正规子半群格Subn S是分配格,当且仅当S或者是带零的局部循环群,或者是Brandt半群B5.同时也给出了Brandt半群S的正规子半群格Subn S是0-分配格的充分必要条件.
The basic relationship of normal subsemigroup lattices of arbitrary counter-semigroups(S),(Subn S)to normal subgroup lattices of maximal group homomorphic image(S/σ)of S(Subng(S/σ))is studied and depicted in this article.It is also proved that normal subsemigroup lattice of Sof Brandt semigroup(B)would be distributive lattice if and only if S was either a locally cyclic group with zero or Brandt semigroup(B5).Meantime,the necessary and sufficient conditions are given for that the normal subsemigroup lattice is a 0-distributive lattice of Sof Brandt semigroup.
引文
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