img2 - Chalkdust

The same diagram as before, but the solid sections connecting each city are now depicted as several individual lines, labelled 1 through p_1 (or p_2 or p_3).

Each pen pal pair has a unique letter carrier between them.

Clare (like gare) is a Chalkdust editor. In her spare time, she’s an assistant professor at Durham University. She likes Skittles, probability, and making the magazine look more like Cosmo.

In conversation with Christopher Lillicrap
Adam Townsend and Clare Wallace talk to the children’s programme creator about writing for younger generations
Chalkdust dissertation prize 2025
Calling all final-year students! This is your opportunity to get your work published as a Chalkdust article.
Chalkdust dissertation prize
Calling all final-year students!
The big argument: What’s the best way to end a proof?
QED or $\square$?
Piet Hein: the pirate
Did the Danish mathematician also sail the high seas?
Top Ten: Parts of a circle
The definitive chart of the circle's greatest parts