Talk:Idempotent Elements form Subsemigroup of Commutative Semigroup

Take a look at Composition of Commuting Idempotent Mappings is Idempotent for what I believe is a somewhat more efficient approach to the manipulations. --Dfeuer (talk) 16:10, 13 March 2013 (UTC)


 * In fact, if you generalize that theorem to semigroups, this one can be proved using that generalization. --Dfeuer (talk) 16:12, 13 March 2013 (UTC)