fire9 - Chalkdust

The centred square numbers can be built from a central dot and four copies of a triangle number.

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
The Hidden Half
We review the ninth of this year's nominees for the Book of the Year
The evolutionary arms race
Applying game theory to evolution
Stopping distances in the Highway Code are wrong
An easy equation to remember for your driving theory test, with dangerous consequences

More from Chalkdust

Oπnions: In defence of toy models

Cryptic wordsearch, Issue 19

On the cover: skyrmions

The Hidden Half

The evolutionary arms race

Stopping distances in the Highway Code are wrong