## group theory

Computer scientists prove how long it should take you to solve Rubik's cube

**Winner of the general public category**. Enormous is the right word: this theorem's proof spans over 10,000 pages in 500 journal articles and no-one today understands all its details. So what does the theorem say?

**Richard Elwes**has a short and sweet introduction.

**Colva Roney-Dougal**takes us into their abstract world and puzzles over a game of Solitaire.

**Tope Omitola**looks back at the tragically short but inspiringly productive life of a true original: Evariste Galois.

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