Number of stitches for circle, sphere and hyperbolic pseudosphere
More from Chalkdust
Feeling the love for Chalkdust T-shirts
The algebra will set your heart aflutter.
In conversation with Andrea Bertozzi
We chat to Andrea about crime, maths and her fluid career
The wonders of mathematical crochet
Hyperbolic surfaces, Klein bottles and more
In conversation with Artur Avila
Chatting with a Fields Medallist in a Leicester Square pub
Time turns backwards at the Spark Festival
The extreme weirdness of slow viscous flows, and why borrowers shouldn't use doggy paddle.
In conversation with Hannah Fry
On the mathematics of love, communicating maths to the public, and women in maths.