摘要
设Xn={1,2,…,n},并赋予自然序.POPn是Xn上的方向保序部分变换半群.对任意2≤r≤n-1,研究了半群POP(n,r)={α∈POPn:|im(α)|≤r}的极大正则子半群的结构,并利用Miller-Clifford定理,证明了半群POP(n,r)的极大正则子半群有且仅有一类,即Mα=POP(n,r-1)∪(Jr\Rα),α∈Jr,Jr={α∈POPn:|im(α)|=r},Rα表示α所在R-类.
Let Xn : { 1,2,…, n }, ordered in the standard way. Let POPn be the partial orientationpreserving transformation semigroup on Xn. For an arbitrary integer r such that 2≤r≤n-1, the structures of the maximal regular subsemigroups of the semigroup POP(n,r)= {α∈ POPn :[ im(α) ≤ r} were studied. Using Miller-Clifford theorem,the authors have proved that POP(n,r) has exactly a class of maximal regular subsemigroups, Ma= POP (n, r- 1 ) U (Jr /Rs ), α ∈ J, where J = { α E POP. : Jim(α) I =r} ,Ra be the R-class containing α.
出处
《东北师大学报(自然科学版)》
CAS
CSCD
北大核心
2015年第2期31-34,共4页
Journal of Northeast Normal University(Natural Science Edition)
基金
国家自然科学基金资助项目(11461014)
贵州省科学技术基金资助项目(黔科合J字[2013]2225号)
关键词
变换半群
方向保序
极大正则子半群
transformation semigroup
orientation-preserving
maximal regular semigroup