Articles by James Cann James CannJames Cann is a PhD student at UCL and is attached to the London School of Geometry & Number Theory. He likes maths best when explained with pictures.All articles by James On the cover: Chladni figures of a square drum12 March 2018Find out more about the patterns on the cover of Issue 07You can count on Dirichlet13 March 2016Counting the divisors of an integer turns out to be a rather hard problem