Isobel_aditl_top - 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
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
Dear Dirichlet, Issue 08
Village fetes, Brexit and flowers are among the topics of discussion in this issue's Dear Dirichlet advice column
Can you make something out of nothing?
We explore the concept of emptiness in set theory, and explain how zero went from "nothing" to "something"
Switching sides in a matrix equation
Looking for a neat description of this useful matrix part-inverse