Bondarenko, V.M.; Zaciha, Ya.V.
(Algebra and Discrete Mathematics, 2015)
Let K be a class of semigroups and P be a set of general properties of semigroups. We call a subset Q of P characteristic for a semigroup S ∈ K if, up to isomorphism and antiisomorphism, S is the only semigroup in K, which ...