Balaban 10-cage

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In the mathematical field of graph theory, the Balaban 10-cage or Balaban (3,10)Script error: No such module "Check for unknown parameters".-cage is a 3-regular graph with 70 vertices and 105 edges named after Alexandru T. Balaban.[1] Published in 1972,[2] It was the first 10-cage discovered but it is not unique.[3]

The proof of minimality of the number of vertices was given by Mary R. O'Keefe and Pak Ken Wong.[4] There exist 3 distinct (3,10)Script error: No such module "Check for unknown parameters".-cages, the other two being the Harries graph and the Harries–Wong graph.[5] Moreover, the Harries–Wong graph and Harries graph are cospectral graphs.

The Balaban 10-cage has chromatic number 2, chromatic index 3, diameter 6, girth 10 and is hamiltonian. It is also a 3-vertex-connected graph and 3-edge-connected. The book thickness is 3 and the queue number is 2.[6]

The characteristic polynomial of the Balaban 10-cage is

(x3)(x2)(x1)8x2(x+1)8(x+2)(x+3)
(x26)2(x25)4(x22)2(x46x2+3)8.

Gallery

See also

Molecular graph
Balaban 11-cage

References

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  1. Script error: No such module "Template wrapper".
  2. Alexandru T. Balaban, A trivalent graph of girth ten, Journal of Combinatorial Theory Series B 12 (1972), 1–5.
  3. Pisanski, T.; Boben, M.; Marušič, D.; and Orbanić, A. The Generalized Balaban Configurations. Preprint. 2001.
  4. Mary R. O'Keefe and Pak Ken Wong, A smallest graph of girth 10 and valency 3, Journal of Combinatorial Theory Series B 29 (1980), 91–105.
  5. Bondy, J. A. and Murty, U. S. R. Graph Theory with Applications. New York: North Holland, p. 237, 1976.
  6. Jessica Wolz, Engineering Linear Layouts with SAT. Master Thesis, Universität Tübingen, 2018

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