ON E-UNITARY COVERS OF ORTHODOX SEMIGROUPS
Mária B. Szendrei · International Journal of Algebra and Computation · 1993
In this paper we prove that each orthodox semigroup S has an E-unitary cover embeddable into a semidirect product of a band B by a group where B belongs to the band variety generated by the band of idempotents in S. This result is related to an embeddability question on E-unitary regular semigroups raised previously.