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Dirac-wave maps

✍ Scribed by Xiaoli Han


Publisher
Springer
Year
2005
Tongue
English
Weight
164 KB
Volume
23
Category
Article
ISSN
0944-2669

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It is proved that the choice number of every graph G embedded on a surface of Euler genus Ξ΅ β‰₯ 1 and Ξ΅ = 3 is at most the Heawood number H(Ξ΅) = (7 + √ 24Ξ΅ + 1)/2 and that the equality holds if and only if G contains the complete graph K H(Ξ΅) as a subgraph.