Minimal nonpermutative pseudovarieties of semigroups. I
Minimal nonpermutative pseudovarieties of semigroups. I
A semigroup is permutative if it satisfies an identity of the form x ι x i ' # * χ n = *σi*σ2 ' " X σ» where σ is a non-identical permutation of {1,2,..., n }.The finite permutative semigroups form a pseudovariety and permutative pseudovarieties enjoy many properties first …