The Szekeres snark was the fifth snark discovered, illustrated above. It has 50 vertices and edge chromatic number 4.
Szekeres Snark
See also
SnarkPortions of this entry contributed by Ed Pegg, Jr. (author's link)
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References
Holton, D. A. and Sheehan, J. The Petersen Graph. Cambridge, England: Cambridge University Press, pp. 82 and 88-90, 1993.Szekeres, G. "Polyhedral Decompositions of Cubic Graphs." Bull. Austral. Math. Soc. 8, 367-387, 1973.West, D. B. Introduction to Graph Theory, 2nd ed. Englewood Cliffs, NJ: Prentice-Hall, p. 305, 2000.Cite this as:
Pegg, Ed Jr. and Weisstein, Eric W. "Szekeres Snark." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/SzekeresSnark.html