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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
Christmas competition #2: ‘More geometry snacks’
Win this year's best book of geometry puzzles
What makes a good puzzle?
If you enjoyed Hannah's sweets then you'll love these...