Beyond the Four Colour Theorem

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In 1976 two American mathematicians ended a century and a quarter of speculation by proving that every map in the plane can be coloured with four colours. What’s happened to map-colouring since then? And what’s it all for, anyway?

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This event was on Wed, 19 Nov 1997

Professor Ian Stewart

Professor Ian Stewart FRS

Professor of Geometry

Ian Stewart read Mathematics at Churchill College, Cambridge before completing his doctorate at the University of Warwick where he is now a Professor of Maths...

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