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Heawood conjecture
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English
Etymology
Formulated in 1890 by Percy John Heawood.
Proper noun
1
en graph theory A conjecture (proven in 1968) that gives a lower bound for the number of colors that are necessary for graph coloring on a surface of a given genus.
Related terms
en Heawood number
See also
en Ringel-Youngs theorem
en eponyms