π*-半群  

π*-semigroup

作　　者：伊保林[1] 

机构地区：[1]青海民族学院数学系,青海西宁810007

出　　处：《青海师专学报》2009年第5期1-3,共3页Journal of Qinghai Junior Teachers' College

摘　　要：本文给出了π*-半群的概念,证明了π*-半群是正则半群;π*-半群可以不是纯正半群,可以不是弱正则*-半群.存在π*-半群无法重新定义*运算使之成为弱正则*-半群.In this pape π^＊ - semigroup is introduced and prove that a π^＊ -semigroup is a regular semigroup , a π^＊ -semigroups maybe is not an orthodox semigroup, a π^＊ - semigroup maybe is not a weakly regular ＊ - semigroup , exist aπ^＊ -semigroups S we can＇ t define a unary operation ＊ on it such that S is a weakly regular ＊ - semigroup.

关 键 词：π*-半群 纯正半群 弱正则*-半群 

分 类 号：O152[理学—数学]