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The four-color theorem for small maps. (English) Zbl 0313.05109


MSC:

05C15 Coloring of graphs and hypergraphs
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References:

[1] Ore, O., (The Four Color Problem (1967), Academic Press: Academic Press New York) · Zbl 0149.21101
[2] Ore, O.; Stemple, J. G., Numerical calculations on the four color problem, J. Combinatorial Theory, 8, 65-78 (1970) · Zbl 0187.45503
[3] Heesch, H., Untersuchungen zum Vierfarbenproblem (1969), Mannheim · Zbl 0187.20904
[4] Heesch, H., Chromatic reduction of the triangulations \(T_e, e = e_5 + e_7\), J. Combinatorial Theory (B), 13, 46-55 (1972) · Zbl 0242.05110
[5] F. Bernhart; F. Bernhart
[6] J. Mayer; J. Mayer
[7] J. Mayer; J. Mayer
[8] F. Allaire and E. R. Swart; F. Allaire and E. R. Swart · Zbl 0398.05034
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