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

05C15 Coloring of graphs and hypergraphs
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[1] Ore, O, ()
[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
[4] Heesch, H, Chromatic reduction of the triangulations Te, e = e5 + e7, J. combinatorial theory (B), 13, 46-55, (1972) · Zbl 0242.05110
[5] \scF. Bernhart, thesis, Kansas State University.
[6] \scJ. Mayer, “Nouvelles reductions dans le problème des quatre couleus,” Montpellier, Université des Sciences et Techniques du Languedoc, Cahiers mathématiques de Montpellier, No. 1.
[7] \scJ. Mayer, “Inégalités nouvelles dans le problème des quatre couleurs,” to appear.
[8] \scF. Allaire and E. R. Swart, “A systematic approach to the determination of reducible configurations in the four-colour conjecture,” to appear. · Zbl 0398.05034
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