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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.

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
What’s hot and what’s not, Issue 18
Fashion is fleeting, Chalkdust regulars are not.
Top ten vote issue 14
Have your say on the top ten matrices
A few of Euler’s masterpieces
``Read Euler, read Euler, he is the master of us all." -- Laplace. An invitation to join us in celebrating Euler's 311th birthday by appreciating a few of his great contributions to mathematics.
You can count on Dirichlet
Counting the divisors of an integer turns out to be a rather hard problem

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Cryptic wordsearch, Issue 19

On the cover: skyrmions

What’s hot and what’s not, Issue 18

Top ten vote issue 14

A few of Euler’s masterpieces

You can count on Dirichlet