More from Chalkdust
The big argument: What’s the best way to end a proof?
QED or $\square$?
Peculiar Deaths of Famous Mathematicians
We review the third of this year’s nominees for the Book of the Year
Dear Dirichlet Christmas special
Agony uncle Professor Dirichlet answers your personal problems this Christmastime.
Roots: All things being equal
The story of how we got the equals sign
Pandigital square numbers
Why are there none in base 13?
Ace
How tennis players spin and slice their serves