English

On semigroups of orientation-preserving partial permutations with restricted range

Rings and Algebras 2024-01-05 v1

Abstract

Let Ωn\Omega_n be a finite chain with nn elements (nN)(n\in\mathbb{N}), and let POPIn\mathcal{POPI}_{n} be the semigroup of all injective orientation-preserving partial transformations of Ωn\Omega_n. In this paper, for any nonempty subset YY of Ωn\Omega_n, we consider the subsemigroup POPIn(Y)\mathcal{POPI}_{n}(Y) of POPIn\mathcal{POPI}_{n} of all transformations with range contained in YY. We describe the Green's relations and study the regularity of POPIn(Y)\mathcal{POPI}_{n}(Y). Moreover, we calculate the rank of POPIn(Y)\mathcal{POPI}_{n}(Y) and determine when two semigroups of this type are isomorphic.

Keywords

Cite

@article{arxiv.2401.02185,
  title  = {On semigroups of orientation-preserving partial permutations with restricted range},
  author = {De Biao Li and Vítor H. Fernandes},
  journal= {arXiv preprint arXiv:2401.02185},
  year   = {2024}
}
R2 v1 2026-06-28T14:08:33.336Z