## algebra

What is group theory and why is it such an exciting area of maths? Two experts explain.

Having trouble with algebra? Then try these visual proofs of two well-known algebraic identities.

How to derive the famous quadratic formula from pictures, just like the Babylonians did.

**Anna Faherty**takes us on a tour of his work.

**Chris Sangwin**takes us through excerpts of Euler's algebra text book and finds that modern teaching could have something to learn from Euler's methods.

**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.