摘要
引入了Ｃ—群的概念，讨论了Ｃ—群与Ｃ—半群的关系。
In this paper, C-groups is introduced, the relations between C-semigroups and C-groups are discussed, finally some conditions for the invertability of c-semigroups are obtained.
出处
《延安大学学报（自然科学版）》
1997年第2期10-13,共4页
Journal of Yan'an University：Natural Science Edition
