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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.

Chalkdust dissertation prize
Calling all final-year students!
The big argument: What’s the best way to end a proof?
QED or $\square$?
Why Study Mathematics?
We review the fifth of this year's nominees for the Book of the Year
Dear Dirichlet, Issue 06
Prof. Dirichlet tackles archaeology and supercomputers in answering your personal problems
Newsletter puzzles
These puzzles appeared in the Chalkdust newsletters. You can find the answers here and sign up for the newsletter here.
Thoughts on the crossnumber
Did you use meta-logic to solve the crossnumber?

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