More from Chalkdust
- Sophie Maclean and David Sheard speak to a very top(olog)ical mathematician!
- £100 of Maths Gear goodies to be won if you can solve it
- David Sheard sets the third puzzle. Can you solve it?
- David Sheard explores the rich mathematics and history behind the Apollonian packing, and the cover of issue 11
- Vote for your favourite Chalkdust regular