Four color theorem

Proper noun

Definitions

1.Proper nounA theorem stating that given any separation of a plane into contiguous regions, producing a figure called a map, no more than four colors are required to color the regions so that no two adjacent regions have the same color (adjacent being defined as two regions sharing a boundary, not counting corners, in which three or more regions share a boundary).

Synonyms

coloring cocoloring de bruijn-erdős theorem ramsey's theorem heawood conjecture gomory's theorem chromatic number van der waerden's theorem 4-polytope whitney's theorem jordan curve theorem rectagraph

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