A doodle with its vertices slightly “exploded”: the doodle is simply a distorted circle.
More from Chalkdust
On the cover: cellular automata
Discover the meaning of the coloured squares on the cover of issue 13
Rewatch the Issue 12 virtual launch event
Now available to catch up on YouTube
What’s hot and what’s not, Issue 10
Fashion is fleeting, Chalkdust regulars are not.
Dear Dirichlet, Issue 07
Pigs, popes and produce are among the topics of discussion in this issue's Dear Dirichlet advice column
Top Ten vote: Colours of chalk
Vote for your favourite colour of chalk for Issue 04: is it white, yellow, or the Post Office Tower?
Puzzles, Issue 01
These puzzles appeared in Issue 01 of the magazine.