English

Topological Symmetry Groups of Complete Bipartite Graphs

Geometric Topology 2018-08-14 v2 Combinatorics

Abstract

The symmetries of complex molecular structures can be modeled by the {\em topological symmetry group} of the underlying embedded graph. It is therefore important to understand which topological symmetry groups can be realized by particular abstract graphs. This question has been answered for complete graphs; it is natural next to consider complete bipartite graphs. In previous work we classified the complete bipartite graphs that can realize topological symmetry groups isomorphic to A4A_4, S4S_4 or A5A_5; in this paper we determine which complete bipartite graphs have an embedding in S3S^3 whose topological symmetry group is isomorphic to Zm\mathbb{Z}_m, DmD_m, Zr×Zs\mathbb{Z}_r \times \mathbb{Z}_s or (Zr×Zs)Z2(\mathbb{Z}_r \times \mathbb{Z}_s) \ltimes \mathbb{Z}_2.

Keywords

Cite

@article{arxiv.1412.7255,
  title  = {Topological Symmetry Groups of Complete Bipartite Graphs},
  author = {Kathleen Hake and Blake Mellor and Matthew Pittluck},
  journal= {arXiv preprint arXiv:1412.7255},
  year   = {2018}
}

Comments

26 pages, minor revisions; this is the final version accepted by Tokyo Journal of Mathematics