English

Cyclic pseudo-{L}oupekine snarks

Combinatorics 2019-04-12 v2

Abstract

In 1976, Loupekine introduced (via Isaacs) a very general way of constructing new snarks from old snarks by cyclically connecting multipoles constructed from smaller snarks. In this paper, we generalize Loupekine's construction to produce a variety of snarks which can be drawn with mm-fold rotational symmetry for m3m\geq 3 (and often, mm odd), constructed as Zm\mathbb{Z}_{m} lifts of \emph{voltage graphs} with certain properties; we call these snarks \emph{cyclic pseudo-Loupekine snarks}. In particular, we discuss three infinite families of snarks which can be drawn with Zm\mathbb{Z}_{m} rotational symmetry whose smallest element is constructed from 3 snarks with 3-fold rotational symmetry on 28 vertices; one family has the property that the oddness of the family increases with mm. We also develop a new infinite family of snarks, of order 12m12m for each odd m3m\geq 3, which can be drawn with mm-fold rotational symmetry and which are constructed beginning with a 3-edge-colorable graph, instead of a snark.

Cite

@article{arxiv.1707.05294,
  title  = {Cyclic pseudo-{L}oupekine snarks},
  author = {Leah Wrenn Berman and Déborah Oliveros and Gordon I. Williams},
  journal= {arXiv preprint arXiv:1707.05294},
  year   = {2019}
}

Comments

22 figures, 7 tables

R2 v1 2026-06-22T20:49:24.965Z