Bulletin of the American Mathematical Society

Every planar map is four colorable

K. Appel and W. Haken

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Article information

Bull. Amer. Math. Soc., Volume 82, Number 5 (1976), 711-712.

First available in Project Euclid: 4 July 2007

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Mathematical Reviews number (MathSciNet)

Zentralblatt MATH identifier

Primary: 05C15: Coloring of graphs and hypergraphs


Appel, K.; Haken, W. Every planar map is four colorable. Bull. Amer. Math. Soc. 82 (1976), no. 5, 711--712. https://projecteuclid.org/euclid.bams/1183538218

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