The Least Orthogroup Congruence on Central Completely Regular Semigroups
Guoxin Liu · Journal of Southwest University · 2010
This paper aims to prove that(H∩ρS G)is the least orthogroup congruence on central completely regular semigroups,by studying the least orthogroup congruence on central cryptogroupsρO={(a,b)∈S×S-a0=b0,ab-1∈C(S)}and the least Clifford congruence on central completely regular semigroupsρS G={(a,b)∈S×S-aDb,ab-1∈C(S)}