On isomorphisms of $\mathcal{R}$- and $\mathcal{L}$-cross-sections of wreath products of finite inverse symmetric semigroups

Abstract

We classify $\mathcal{R}$- and $\mathcal{L}$-cross-sections of wreath products of finite inverse symmetric semigroups ${\mathcal{I}\mathcal{S}}_m{\wr }_p{\mathcal{I}\mathcal{S}}_n$ up to isomorphism. We show that every isomorphism of $\mathcal{R}$ ($\mathcal{L}$-) cross-sections of ${\mathcal{I}\mathcal{S}}_m{\wr }_p{\mathcal{I}\mathcal{S}}_n$ is a conjugacy. As an auxiliary result, we get that every isomorphism of $\mathcal{R}$- ($\mathcal{L}$-) cross-sections of ${\mathcal{I}\mathcal{S}}_n$ is also a conjugacy. We also compute the number of non-isomorphic $\mathcal{R}$- ($\mathcal{L}$-) cross-sections of ${\mathcal{I}\mathcal{S}}_m{\wr }_p{\mathcal{I}\mathcal{S}}_n$.