From the history of maths
G. H. Hardy
He recognised Ramanujan’s genius from a single letter and brought him to Cambridge in 1914.
His A Mathematician’s Apology (1940) is a short, moving defence of maths for its own beauty.
Unknown author, Public domain, via Wikimedia Commons
Where you’ll meet G. H. Hardy here
Number theoryHistory
They turn up beside problems and lessons on these topics.
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Aryabhata
At 23 he wrote the Aryabhatiya (499 CE), a book in verse that gives π as 62832 ÷ 20000 = 3.1416.
India’s first satellite, launched in 1975, was named after him.
A modern statue; no likeness from his lifetime survives. Cpjha13, CC BY-SA 4.0, via Wikimedia Commons (resized)