English

The isomorphism problem for reduced finitary power monoids

Combinatorics 2026-02-02 v1

Abstract

Let HH be a multiplicatively written monoid with identity 1H1_H and let Pfin,1(H)\mathcal{P}_{\text{fin},1}(H) denote the reduced finitary power monoid of HH, that is, the monoid consisting of all finite subsets of HH containing 1H1_H with set multiplication as operation. Building on work of Tringali and Yan, we give a complete description of pairs of commutative and cancellative monoids H,KH,K for which Pfin,1(H)\mathcal{P}_{\text{fin},1}(H) and Pfin,1(K)\mathcal{P}_{\text{fin},1}(K) are isomorphic.

Keywords

Cite

@article{arxiv.2601.22469,
  title  = {The isomorphism problem for reduced finitary power monoids},
  author = {Balint Rago},
  journal= {arXiv preprint arXiv:2601.22469},
  year   = {2026}
}
R2 v1 2026-07-01T09:26:58.441Z