Three Partial Orders on Completely Regular Semigroups
Guoxin Liu · Journal of Southwest University · 2011
In this paper,left cryptogroups,local regular cryptogroups and local left regular cryptogroups are characterized by some partial orders.It is proved that a completely regular semigroup S is a left cryptogroup iff M=≤,S is a local regular cryptogroup iff B=≤,and S is a local left regular cryptogroup iff P=≤.