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Nauru graph information


Nauru graph
The Nauru graph is Hamiltonian.
Vertices24
Edges36
Radius4
Diameter4
Girth6
Automorphisms144 (S4×S3)
Chromatic number2
Chromatic index3
Book thickness3
Queue number2
PropertiesSymmetric
Cubic
Hamiltonian
Integral
Cayley graph
Bipartite
Table of graphs and parameters

In the mathematical field of graph theory, the Nauru graph is a symmetric, bipartite, cubic graph with 24 vertices and 36 edges. It was named by David Eppstein after the twelve-pointed star in the flag of Nauru.[1]

It has chromatic number 2, chromatic index 3, diameter 4, radius 4 and girth 6.[2] It is also a 3-vertex-connected and 3-edge-connected graph. It has book thickness 3 and queue number 2.[3]

The Nauru graph requires at least eight crossings in any drawing of it in the plane. It is one of three non-isomorphic graphs tied for being the smallest cubic graph that requires eight crossings. Another of these three graphs is the McGee graph, also known as the (3-7)-cage.[4][5]

  1. ^ Cite error: The named reference DE1 was invoked but never defined (see the help page).
  2. ^ Conder, M. and Dobcsányi, P. "Trivalent Symmetric Graphs Up to 768 Vertices." J. Combin. Math. Combin. Comput. 40, 41-63, 2002.
  3. ^ Wolz, Jessica; Engineering Linear Layouts with SAT. Master Thesis, University of Tübingen, 2018
  4. ^ Sloane, N. J. A. (ed.). "Sequence A110507 (Number of nodes in the smallest cubic graph with crossing number n)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation..
  5. ^ Pegg, E. T.; Exoo, G. (2009), "Crossing number graphs", Mathematica Journal, 11 (2), doi:10.3888/tmj.11.2-2, archived from the original on 2019-03-06, retrieved 2010-01-02.

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