More from Chalkdust
Notched edge cards
Joe Celko makes a database from card and knitting needlesBorwein integrals
Aimen Khan ponders how patterns break downMaths on the Back of an Envelope
We review the eighth of this year's nominees for the Book of the YearCan you make something out of nothing?
We explore the concept of emptiness in set theory, and explain how zero went from "nothing" to "something"The croissant equation
Each time you eat a croissant you might be biting more than 500 layers of dough!What’s your favourite set?
Here we have collected our favourite sets, from the Mandelbrot set to the Mahut-Isner set!