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- #1

- Thread starter Ackbach
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- Thread starter
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- #1

- Aug 30, 2012

- 1,133

Okay, why isn't the number four? Is this diagram of his

-Dan

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- #3

- Mar 5, 2012

- 8,789

The 4-color theorem is for coherent neighboring countries.notflat in the plane? I messed around with the 4 color theorem as a kid and I heard it was proved at some point. How is this one different?

-Dan

This is a more general theorem for graphs for which apparently 4 colors is not enough. We need at least 5 colors.