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The two ways down shown on a Hasse diagram

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
What’s hot and what’s not, Issue 17
Fashion is fleeting, Chalkdust regulars are not.
Dear Dirichlet, Issue 11
Grant applications, musical media and last-minute Olympics training are the topics readers have sent in to the professor's postbox this issue
Topological tic-tac-toe
Alex Bolton plays noughts and crosses on unusual surfaces

More from Chalkdust

Oπnions: In defence of toy models

Cryptic wordsearch, Issue 19

On the cover: skyrmions

What’s hot and what’s not, Issue 17

Dear Dirichlet, Issue 11

Topological tic-tac-toe