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半群P_n(k)的正则性和Green关系 被引量:1

Regularity and Green's Relation on the Semigroup P_n(k)
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摘要 设P_n是X_n={1,…,n}上的部分变换半群.对任意1≤k≤n,令P_n(k)={α∈P_n:(x∈dom(α)x≤k■xα≤k},则易验证P_n(k)是P_n的子半群.刻画了半群P_n(k)的正则元的特征,并且描述了这个半群上的Green关系. Let Pn be the semigroup of all partial transformations of Xn= (1, 2, ... , n}.For 1 ≤ k ≤ n, let Pn(k) = {α ∈ Pn : ( x ∈ dom(α)) x ≤ k xα ≤ k}. Then Pn(k) is a subsemigroup of Pn. In this paper, we describe the regular elements and characterize Green's relations on the semigroup Pn(k).
作者 赵颐 游泰杰 ZHAO Yi YOU Tai-jie(School of Mathematics Science, GuiZhou Normal University, Guiyang 550025, Chin)
出处 《数学的实践与认识》 北大核心 2016年第21期249-254,共6页 Mathematics in Practice and Theory
基金 国家自然科学基金项目(11461014)
关键词 部分变换半群 正则元 Green关系 partial transformation semigroup regular green's relations
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