the ordered semigroups in which a ∈ (Sa2Sa] for every a ∈ S.
Besides, the semilattices of left strongly simple semigroups and the complete
semilattices of left strongly simple semigroups are the same. Moreover, we
prove that an ordered semigroup is a complete semilattice of left strongly simple
semigroups if and only if it is a union of left strongly simple semigroups.
Finally, we show that an ordered semigroup S is a chain of left strongly simple
semigroups if and only if for every a, b ∈ S, we have a ∈ (SabSa] or
b ∈ (SabSb]. The right analogue of our results also hold.