
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.
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Dear Dirichlet, Issue 21
Suits, sofas and sculptures punctuate the prof's postbag this issueOπnions: In defence of toy models
Calum gets on his soap box about toy modelsCryptic wordsearch, Issue 19
Can you solve it?On the cover: skyrmions
Sven Bjarke Gudnason and Calum Ross introduce you to the wonderful world of skyrmionsChristmas conundrum #3
Try our nonograms! And remember, not all puzzles have a unique solution...Dear Dirichlet, Issue 04
Moonlighting agony uncle Prof. Dirichlet answers more of your personal problems