## group theory

**Burkard Polster**and

**Marty Ross**explain why, and explore the maths behind bell ringing.

**Colva Roney-Dougal**explores the maths, from chaos to 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.