SOME SPECIAL (eabeb=eab)-TYPE SEMIGROUPS
Jiang Yan · 2001
Guo, Shum and Zhu proposed the question: Can we discrible the class of semigroups satisfying the equation eab=eabeb for all e∈E(S) and a,b∈S, and dose a non-trivial example of such semigroups exists? This paper will partially answer their question.