English

Quandles of cyclic type with several fixed points

Group Theory 2018-09-11 v2

Abstract

A quandle of cyclic type of order nn with f2f\geq 2 fixed points is such that each of its permutations splits into ff cycles of length 11 and one cycle of length nfn-f. In this article we prove that there is only one such connected quandle, up to isomorphism. This is a quandle of order 66 and 22 fixed points, known in the literature as octahedron quandle. We prove also that, for each f2f\geq 2, the non-connected versions of these quandles only occur for orders nn in the range f+2n2ff+2 \leq n \leq 2f and that, for each f>1f>1, there is only one such quandle of order 2f2f with ff fixed points, up to isomorphism. Still in the range f+2n2ff+2 \leq n \leq 2f, we present sufficient conditions for the existence of such quandles, writing down their permutations; we also show how to obtain new quandles form old ones, leaning on the notion of common fixed point.

Cite

@article{arxiv.1803.10487,
  title  = {Quandles of cyclic type with several fixed points},
  author = {António Lages and Pedro Lopes},
  journal= {arXiv preprint arXiv:1803.10487},
  year   = {2018}
}
R2 v1 2026-06-23T01:07:27.450Z