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Sam is a maths student at Durham University where he hosts
Chalkboard Ultra podcast and spends too much time thinking about spinors. Outside of maths, Sam runs one of the university’s jazz bands.

The big argument: What’s the best way to end a proof?
QED or $\square$?
Dear Dirichlet, Issue 18
Phone assistants, duplicating pastries, and being a 10 anywhere else are among the topics of discussion in this issue's Dear Dirichlet advice column
Top Ten: Calculator buttons
The definitive chart of the best buttons
The croissant equation
Each time you eat a croissant you might be biting more than 500 layers of dough!
Page 3 model
How to model bread making!
How to make: Platonic solids from tube maps
Impress your friends! As presented in our Talkdust show.