## Articles

**Tom Körner**'s explanation really is a piece of cake, served up with a hefty estimate of pi.

**Abigail Kirk**explores one of the formulae that carry his name.

**Shahn Majid**met up with

*Plus*to explain.

**Caroline Series**and

**David Wright**give a short introduction to the maths behind their beautiful images.

**Robin Wilson**starts off a four part series on Euler with a look at his life and work.

**Joan Lasenby**tells us about the mathematics and engineering behind them.