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On the four-vertex theorem

โœ Scribed by U. Pinkall


Publisher
Springer
Year
1987
Tongue
English
Weight
371 KB
Volume
34
Category
Article
ISSN
0001-9054

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๐Ÿ“œ SIMILAR VOLUMES


On a theorem about vertex colorings of g
โœ Claudio Bernardi ๐Ÿ“‚ Article ๐Ÿ“… 1987 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 121 KB

Lawrence [2, Theorem 3] and Borodin and Kostochka [1, Lemma 2' 1 both give the same theorem about vertex colorings of graphs (Corollary 1 below). But Lawrence's proof, although powerful, is a little long, and Borodin and Kostoehka state the result without a proof.

The Four-Colour Theorem
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