关于群的定义的一点注记  

A Few Notes about the Definition of Group

作　　者：董会英[1] 

机构地区：[1]唐山师范学院数学系,河北唐山063000

出　　处：《唐山师范学院学报》2001年第2期5-6,共2页Journal of Tangshan Normal University

摘　　要：就群的定义中只有左单位元素和右逆元素(或只有右单位元素和左逆元素),半群不能成群的情况进行了分析,得出只要限制左(或右)单位元素的唯一性就能使其成群的结论。In this article, the author analyzed the phenomenon that in the definitiong of group, there are only left unit element and right contradictory element (or there are only right unit element and left contradictory element), and came to the conclusion that as long as group results from keeping the unit as singularity.

关 键 词：群 定义 单位元素 逆元素 半群 

分 类 号：O152[理学—数学]