Allaire, Frank Another proof of the four colour theorem. I. (English) Zbl 0506.05028 Numerical mathematics and computing, Proc. 7th Manitoba Conf., Winnipeg/Can. 1977, Congr. Numerantium 20, 3-72 (1978). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 3 Documents MSC: 05C15 Coloring of graphs and hypergraphs 05-02 Research exposition (monographs, survey articles) pertaining to combinatorics Keywords:reducible configurations; irreducible configurations; unavoidable set PDF BibTeX XML