From the history of maths
Évariste Galois
Before he died in a duel at 20, he worked out exactly which polynomial equations can be solved by a formula with roots.
In doing so he founded group theory, the mathematics of symmetry.
Unknown author, Public domain, via Wikimedia Commons
Where you’ll meet Galois here
Algebra
They turn up beside problems and lessons on these topics.
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Shakuntala Devi
Known as the “human computer”, in 1980 at Imperial College London she multiplied two 13-digit numbers in her head in 28 seconds.
She also wrote popular books of puzzles and mental arithmetic.
Central News Agency (Taiwan), Public domain, via Wikimedia Commons