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Does a de Bruijn sequence exist for every length of rhyming pattern? Does every de Bruijn sequence form a cycle? How many universal poems are there of a given length?

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.

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Calling all final-year students!
The big argument: What’s the best way to end a proof?
QED or $\square$?
Significant figures: David Singmaster (1938–2023)
Colin Wright remembers the puzzle giant with a passion for sharing
Top Ten: Maths-themed days out
The definitive chart of the best day trips
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£100 of MathsGear goodies to be won if you can solve it
On curvature: cars, clothoids and cartography
Issah Merchant discusses the geometric principles behind, and real-world applications of, curvature

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