## chaos

*Plus*, we heard how a simple mathematical equation became the subject of a debate in the UK parliament.

**Chris Budd**and

**Chris Sangwin**continue the story of the mighty quadratic equation.

**chaos**.

**mathematical modelling**.

You play tennis like a champion compared with the best of robots, if you play tennis at all.

**Imre Leader**looks at the colourful world of Ramsey Theory.

**Keith Moffatt**tells us about three of the posters from the series.

**Richard P. Taylor**explains that Pollock's patterns are really fractals - the fingerprint of Nature.

**John D. Barrow**explains.

**Andy Burbanks**explains what Lyapunov Exponents are, what the much misunderstood phenomenon of chaos

*really*is, and how you can iterate functions to produce marvellous images of chaos from simple mathematics.