English

Dihedralizing the quaternions

Group Theory 2023-10-23 v1 History and Overview

Abstract

In this paper, we take the classic dihedral and quaternion groups and explore questions like "what if we replace i=e2πi/4i=e^{2\pi i/4} in Q8Q_8 with a larger root of unity?" and "what if we add a reflection to Q8Q_8?" The delightful answers reveal lesser-known families like the dicyclic, diquaternion, semidihedral, and semiabelian groups, which come to life with visuals such as Cayley graphs, cycle graphs, and subgroup lattices.

Keywords

Cite

@article{arxiv.2310.13087,
  title  = {Dihedralizing the quaternions},
  author = {Matthew Macauley},
  journal= {arXiv preprint arXiv:2310.13087},
  year   = {2023}
}

Comments

Expository and recreational. Full color version of a forthcoming Monthly article. 14 pages, 17 figures

R2 v1 2026-06-28T12:56:07.813Z