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2-奇异变换半群T_n(2)的秩

Rank of the 2-singular transformation semigroup T_(n)( 2)
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摘要 设自然数n≥4,X_(n)={1,2,…,n}, Sing_(n)为X_(n)上的奇异变换半群,对α∈Sing_(n),或者存在x∈X_(n){1},使得xα=1α,或者存在x∈X_(n){2},使得xα=2α,称α为2-奇异变换。由Sing_(n)中所有的2-奇异变换构成的半群记为T_(n)(2),通过元素的生成关系得到半群T_(n)(2)的最小生成集,确定了T_(n)(2)的秩为2n-3。 Let n≥4,X_(n)={1,2,…,n}.Sing,is singular transformation semigroup on X_(n).forα∈Sing_(n),αis called 2-singular transformationif it exists x ∈X_(n),\{1} that satisfy xα=1αor exists x∈ X_(n),\{2} that satisfy xα=2α.Let T_(n)(2)be consisting of all 2-singular transformations in Sing,.A minimum generating set is determined through the construction method,and it is proved that the rank of T_(n)(2)is 2n−3.
作者 高荣海 徐波 GAO Ronghai;XU Bo(Journal Editorial Department,Guizhou Normal University,Guiyang 550025,Guizhou,China;School of Mathematical Sciences,Guizhou Normal University,Guiyang 550025,Guizhou,China)
出处 《山东大学学报(理学版)》 北大核心 2025年第11期6-10,15,共6页 Journal of Shandong University(Natural Science)
基金 国家自然科学基金资助项目(61962011)。
关键词 2-奇异变换 半群 生成集 2-singular transformation semigroup generation set rank
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