Introduzione
Abstract
En
We study the semigroups B (S) of the bi-ideals of a semigroup S and obtain characterizations of some classes of orthogroups. Further we prove the existence of an isomorphism between B (S) and B (E) when E is the band of the idempotents of an orthogroups S.
We study the semigroups B (S) of the bi-ideals of a semigroup S and obtain characterizations of some classes of orthogroups. Further we prove the existence of an isomorphism between B (S) and B (E) when E is the band of the idempotents of an orthogroups S.
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