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Four colours suffice: how the map problem was solved

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  1. Department of Mathematical Physics, National University of Ireland, Maynooth, Ireland

    Charles Nash

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  1. Charles Nash
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Correspondence to Charles Nash.

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Nash, C. Four colours suffice: how the map problem was solved. The Mathematical Intelligencer 25, 80–83 (2003). https://doi.org/10.1007/BF02984867

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