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An attempt to understand the four color problem. (English) Zbl 0387.05011


MSC:

05C15 Coloring of graphs and hypergraphs
Full Text: DOI

References:

[1] Appel, Illinois J. Math. 20 pp 218– (1976)
[2] Appel, Illinois J. Math. 21 pp 429– (1977)
[3] Birkhoff, Amer. J. Math. 35 pp 114– (1913)
[4] Erdös, Illinois J. Math. 19 pp 292– (1975)
[5] Haken, J. Combinatorial Theory 14 pp 180– (1973)
[6] Untersuchungen zum Vierfarbenproblem. B-I-Hochschulscripten 810/810a/810b, Bibliographisches Institut, Mannheim/Vienna/Zurich, (1969).
[7] Heesch, J. Combinatorial Theory 13 pp 46– (1972)
[8] Kempe, Amer. J. Math. 2 pp 193– (1879)
[9] Mayer, J. Combinatorial Theory
[10] The Four Color Problem. Academic Press, New York (1967). · Zbl 0149.21101
[11] Tutte, Utilitas Math. 2 pp 241– (1972)
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