How Many Colors Do You Need to Color a Map?

Discover a thorough breakdown concerning How Many Colors Do You Need to Color a Map.

The Four color theorem states that no more than four colors are required for any map. Can it be proved or disproved that 3 colors can be used for United States map? I think this is a question of geometry. – Brian J. Fink May 18 ’14 at 22:38 Note that 4 colors may not suffice if there are exclaves. I don’t know whether this is a problem for the US.

James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.

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