A Colorful Unsolved Problem – Numberphile

James Grime on the Hadwiger–Nelson problem.
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Extra footage from this interview:

The Four Color Map Theorem:

More on James Grime (you can book him for talks):

More James Grime videos:

The de Grey paper:

A good write up on this topic via Quanta Magazine:

The Marijn Heule counterexample:

More links & stuff in full description below ↓↓↓

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