AN EXTENDING METHOD IN TRANSFORMATION SEMIGROUPS
You Tai · Journal of Mathematics · 2001
Let T Ω be the transformation semigroup on a set Ω , and e an idempotent of T Ω with imaging X=im(e). If G is a subgroup of the symmetric group S X , we shall give a method of extending G to be an orthodox subsemigroups of T Ω by the idempotent e .