
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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Cryptic wordsearch, Issue 19
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Infinitely many primes ending in 1, 3, 7 and 9 proved in typically Eulerian style.