david_sheard - Chalkdust

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.
davidsheard.co.uk/ + More articles by David

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
Secrets, surveys and statistics
Paula Rowińska uses mathematics to answer some awkward questions
Do you have too many or too few friends?
Do we have a natural limitation on the number of friends that we have?