More from Chalkdust
Dear Dirichlet, Issue 22
Rhythm, rivers and rises pollute the prof's postbag this issue
Christmas puzzles: the solutions
We reveal the solutions to our Christmas puzzles!
Christmas conundrum #4
Can you solve four puzzles to reveal the hidden message?
Between a square rock and a hard pentagon: fractional polygons
A polygon with four and a half sides?!
Superegg
How optimising the space around a circular monument is related to supereggs
Optimal Pac-Man
Matthew Scroggs spends too much time beating this arcade classic.