Will an old problem yield a new insight? Perhaps an elegant proof of the 4-colour theorem?

The 4-colour problem is one of the most famous mathematical problems. It resisted proof for more than a hundred years before finally succumbing; in the end, there was a valid proof, but one that relied on more than a thousand hours of computer time. Jim Tilley’s research suggests that a dramatic simplification might ultimately be possible. He has discovered a […]

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