Schottky_arrangement-1

A valid arrangement of circles, with their
interiors shaded. Note that the straight
line is an infinite radius circle through $\infty$,
so it still counts.

David Sheard

David is a final year PhD student at UCL studying geometric group theory. When not doing maths he can usually be found singing or playing the flute.

On the cover: Some assembly required
Trippy brain massages from Sam Palmer's artwork on the front of Issue 16
My favourite LaTeX package
The Chalkdust editors share some of their favourites
In conversation with Ulrike Tillmann
Sophie Maclean and David Sheard speak to a very top(olog)ical mathematician!
Page 3 model: Solitons
Solitons
Chalkdust issue 11 puzzle hunt #3
David Sheard sets the third puzzle. Can you solve it?
On the cover: Apollonian packing
David Sheard explores the rich mathematics and history behind the Apollonian packing, and the cover of issue 11