img5 - Chalkdust

Calum is a lecturer in physics at Edge Hill University where he studies topological solitons and enjoys talking about maths and physics to anyone who will listen. He can often be found on the side of a mountain or out on a bike, talking to himself about solitons.

Oπnions: In defence of toy models
Calum gets on his soap box about toy models
Dear Dirichlet, Issue 20
Cricket, coursework and karaoke are among the problems solved in this issue's Dear Dirichlet agony aunt column
Cryptic wordsearch, Issue 19
Can you solve it?
On the cover: skyrmions
Sven Bjarke Gudnason and Calum Ross introduce you to the wonderful world of skyrmions
The Irrational Diary of Clara Valentine
We review the fifth of this year’s nominees for the Book of the Year
Why is it so hard to pull two phone books apart?
Take two phone books and interleave all their pages one by one. Now try and pull them apart by their spines. Impossible, right?