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So, there was this one question "Can every map be colored with just 4 colors?"... And there I sit, knowing that every map of CONTIGUOUS territories can be colo

by hooby 2y ago

So, there was this one question "Can every map be colored with just 4 colors?"... And there I sit, knowing that every map of CONTIGUOUS territories can be colored with 4 colors - but on real world maps, there are enclaves - little islands that belong to a country that they have not connection to. And if those shall have the same color as their parent country, then 4 colors is not enough... So I pick the answer "NO". > you are wrong!!!!! every map can be colored with 4 colors! it has been proven!!!!!

N0b8ez 2y ago
>but on real world maps, there are enclaves - little islands that belong to a country that they have not connection to. And if those shall have the same color as their parent country, then 4 colors is not enough... Can you give an example of one that can't be colored with 4 colors?
- hooby 2y ago
  They all can be colored in 4 colors - if you don't care about giving the enclave the same color as the parent country. If you insist giving those little islands the same color as the country they belong to, then things get difficult. That's not always doable in 4 colors. see: https://upload.wikimedia.org/wikipedia/commons/thumb/b/b5/4CT_Inadequacy_Example.svg/300px-4CT_Inadequacy_Example.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/b/b5/4C...