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Nora Koparan tells the story of the first female professor of mathematics

Puzzle #1 in our 2020 Christmas puzzle series

Swing on a magnetic pendulum into our autumn 2018 issue. Topological tic-tac-toe, maths, cake, categories, plus all your favourite regulars.

Robert J Low flips one upside down.

James Grime gets intimate with 'the most beautiful woman in the world' from the golden age of Hollywood

Agony uncle Professor Dirichlet answers your personal problems this Christmastime.