# 3

A demonstration of the butterfly effect in the three-disc system. On the right, $\theta_0$ has been increased by 0.001° compared to the left.

Matthew is a postdoctoral researcher at University College London. He hasn’t had time to play Klax since the noughties, but he’s pretty sure that Coke is it!

• ### Prize crossnumber, Issue 16

Can you solve it?
• ### Cryptic crossword, Issue 16

Can you solve it?
• ### Crossnumber winners, Issue 15

Did you solve it?
• ### My favourite LaTeX package

The Chalkdust editors share some of their favourites
• ### On the cover: cellular automata

Discover the meaning of the coloured squares on the cover of issue 13
• ### Oπnions: Should I share my code?

Scroggs debates whether sharing truly is caring