摘要
设In和Sn分别是有限集Xn={1,2,…,n}上的对称逆半群和对称群。对0≤r≤n−1,令I(n,r)={α∈In:|im(α)|≤r},则I(n,r)是对称逆半群In的双边理想。记Cn=,其中g=(12…n),称Cn为Xn上的循环群。通过分析半群CI(n,r)=I(n,r)∪Cn的格林关系及生成关系,获得了半群CI(n,r)的(完全)独立子半群的完全分类。进一步,证明了半群CI(n,r)的极大独立子半群与极大完全独立子半群是一致的。
Let In and Sn be symmetric inverse semigroup and symmetric group on the finite set Xn={1,2,…,n}, respectively. For 0≤r≤n−1, put I(n,r)={α∈In:|im(α)|≤r}, then the I(n,r) is a two-sided ideal of symmetric inverse semigroup In. Denote Cn=, where there is g=(12…n), say that Cn is a circle group on Xn. By analyzing the Green’s relation and generative relation of the semigroup CI(n,r)=I(n,r)∪Cn, the complete classification of the (completely) isolated subsemigroups of CI(n,r) is obtained. Further, the coincide of maximal isolated subsemigroups and maximal completely isolated subsemigroups of semigroups CI(n,r) be proved.
出处
《理论数学》
2023年第6期1589-1595,共7页
Pure Mathematics