More from Chalkdust
In conversation with Jens Marklof
Bethany Clarke and Enric Solé-Farré chat to the professor and new president of the London Mathematical Society about academia, access and awards
Chalkdust issue 13 – Coming 1 May
A great start to the month of Maying
Hiding in plain sight
Axel Kerbec gets locked out while exchanging keys
The simplest difficult task
Factorisation is often used in cryptography. But there's something even simpler which turns out to be just as hard.
Christmaths carols II
Behind today's door... Another carol!
Time turns backwards at the Spark Festival
The extreme weirdness of slow viscous flows, and why borrowers shouldn't use doggy paddle.