David Blackwell. Image: George Bergman
More from Chalkdust
Crossnumber winners, Issue 16Did you solve it?
Prize crossnumber, Issue 16Can you solve it?
Cryptic crossword, Issue 16Can you solve it?
Crossnumber winners, Issue 15Did you solve it?
My favourite LaTeX packageThe Chalkdust editors share some of their favourites
On the cover: cellular automataDiscover the meaning of the coloured squares on the cover of issue 13