Supported by National Natural Science Foundation of China(10671151);Youth Foundation of School(QN1134;QN1138);NSFC(11226044);Scientific Research Program Funded by Shanxi Provincial Education Department(12JK0876;12JK1000)
supported by National Natural Science Foundation of China (Grant No. 10671151);Natural Science Foundation of Shaanxi Province (Grant No. SJ08A06);partially by UGC (HK) (Grant No. 2160123)
As a generalization of an orthodox semigroup in the class of regular semigroups, a type W semigroup was first investigated by El-Qallali and Fountain. As an analogy of the type W semigroups in the class of abundant se...