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Excluded power graphs of groups

Combinatorics 2026-03-24 v2 Group Theory

Abstract

Let X\mathcal{X} be a set of integers greater than one. The X\mathcal{X}-excluded power graph of a group GG has vertex set GG and an edge from gg to each power of gg other than itself provided that the power is not divisible by any element of X\mathcal{X}. When G=H×KG=H\times K for groups HH and KK with coprime orders, excluding the prime factors of H|H| yields a power graph with a quotient consisting of multiple copies of a quotient of the power graph (no exclusions) of KK. Partial results for the semidirect product under the same conditions are given. We describe groups whose X\mathcal{X}-excluded power graphs consist of disjoint directed cliques.

Keywords

Cite

@article{arxiv.2502.09519,
  title  = {Excluded power graphs of groups},
  author = {Brian Curtin},
  journal= {arXiv preprint arXiv:2502.09519},
  year   = {2026}
}
R2 v1 2026-06-28T21:43:27.508Z