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Four Colours Suffice: How the Map Problem Was Solved (Allen Lane Science)
Robin J. Wilson (Author) Average Customer Review: Available from these sellers.
Amazon.co.uk Review
At first glance Four Colours Suffice seems like such an easy thing to prove. However big and complicated the map, four colours are enough to distinguish each country from its neighbours. How do we prove that only four colours are needed? Once we realise that, if four countries all share borders... Read More |
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