On finite groups with exactly one noncommutator
Group Theory
2025-09-23 v1
Abstract
An element of a group is a commutator if it can be expressed in the form for some . In 2010 MacHale posed the following problem in the Kourovka notebook: does there exist a finite group , with , such that there is exactly one element of which is not a commutator? We answer this question in the affirmative and provide an infinite series of such groups, the smallest group in our construction having size .
Cite
@article{arxiv.2509.17587,
title = {On finite groups with exactly one noncommutator},
author = {Saveliy V. Skresanov},
journal= {arXiv preprint arXiv:2509.17587},
year = {2025}
}
Comments
4 pages. GAP code in the ancillary file