Author(s): LIAO Qunying, YU Bingjun
Pages: 131-133
Year: 2001 Issue:  2
Journal: JOURNAL OF SICHUAN NORMAL UNIVERSITY(NATURAL SCIENCE)
Keyword:  平移; 半格; 自同态; 膨胀;
Abstract: Sufficient and neccessary conditions for a semigroup S in whicheach left or right translation is idempotent are given. As a corrollary, when S is commutative, its structure is described.