A Five Eelements Biordered Set Is the Biordered Set of Some Semigroup
Guo Zi-xu · Journal of Gansu Lianhe University · 2006
This paper shows that a five elements biordered set is the biordered set of some semigroups.Biordered set property and the representation φ which is a morphism from E into T(X)×T~*(Y) are the main tools.