It is clear that most results in ample
semigroups are but analogues of inverse semigroups.
Unlike bisimple inverse -semigroups which -classes
contains regular elements as studied in [28] and later
extended in [2] and [3] to a class of ample semigroups
Keywords :
Cancellative monoids, abundant semigroups, adequate semigroups, ample semigroups, bisimple semigroups, binary array of bisystems of cancellative monoids.