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Sophie Bleau uncovers the secrets behind covering maps

Computational proofs, AI music and embarrassing surveys feature in the autumn 2019 issue. Plus all your favourite puzzles & columns.

This article will (unsurprisingly) tell you how to crochet a fractal

A fiendish puzzle for you to 'pour' over...

Take a ball, divide it into parts, glue them back and get two identical copies of your ball!

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