More from Chalkdust
Top Ten: Waves
The definitive chart of the best wavesReview: Mathematical socks 2
More sartorial inquisition for your feetPiet Hein: the pirate
Did the Danish mathematician also sail the high seas?Top Ten: Geometry instruments
The definitive chart of the best toolsHow to make: mathematical crochet
How to make mathematical crochetYou can count on Dirichlet
Counting the divisors of an integer turns out to be a rather hard problem