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Thread: 4 colour map

  1. #1
    Guild Expert Straf's Avatar
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    Oct 2016
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    Beautiful rural Norfolk, UK
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    Default 4 colour map

    In 1976 the first major mathematical theorem to be proved by computer ended a 120+ year puzzle: Is it possible to colour a map of regions or countries where no colour is in 2 areas that share a border. A corner does not qualify as a border, only where a length of border, no matter how short, is shared with two or more the colours must be different.

    With this in mind would anyone be interested in mapping a world, continent or country using no more than 4 colours for the countries, regions, states, etc. where no two sharing a border can have the same colour?

  2. #2

    Default

    Ooooooo... A patchwork political map?

    Four carefully chosen colours?

    I'd LOVE it. Count me in

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