All Coregular Semigroups in the Ideal K(n, 2) of the Full Transformation Semigroup Tn
Tiwadee Musunthia · Proceedings of the Bulgarian Academy of Sciences · 2013
The semigroup S is called coregular if a = a for all a ∈ S. In this paper, we give a characterization of all coregular transformation semigroups within the ideal K(n, 2) of all transformations on an n-element set with rank less or equal to two.