More from Chalkdust
Dear Dirichlet, Issue 21
Suits, sofas and sculptures punctuate the prof's postbag this issue
On the cover: VisualPDE.com
Ben Walker, Adam Townsend & Andrew Krause invite you to play with their fun online PDE visualiser
Top Ten: Maths-themed days out
The definitive chart of the best day trips
The phantom parabola
Zoe Griffiths investigates paranormal quadratics
Piet Hein: the pirate
Did the Danish mathematician also sail the high seas?
In conversation with Eugenia Cheng
We chat to the author of the best-selling book How to Bake Pi and pioneer of maths on YouTube