More from Chalkdust
- Sophie Maclean and David Sheard speak to a very top(olog)ical mathematician!
- Parishoners, partners and puzzled playwrights have written in to the professor's postbox this issue
- 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
- For those of you tackling this dilemma, here's your answer...