In the mathematical field of graph theory, the Heawood graph is an undirected graph with 14 vertices and 21 edges, named after Percy John Heawood. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
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1. Heawood Graph (Wikipedia)
Lead section
In the mathematical field of graph theory, the Heawood graph is an undirected graph with 14 vertices and 21 edges, named after Percy John Heawood.
Lead
The map and graph were discovered by Percy John Heawood in 1890, who proved that no map on the torus could require more than seven colors and thus this map is maximal.
In Branch: Graph Theory, Lead sentence
In the mathematical field of graph theory, the Heawood graph is an undirected graph with 14 vertices and 21 edges, named after Per
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