François Viète (1540–1603)

Born 1540 CE, died 1603 CE.

François Viète (French: [fʁɑ̃swa vjɛt]; 1540 – 23 February 1603), known in Latin as Franciscus Vieta, was a French mathematician whose work on new algebra was an important step towards modern algebra, due to his innovative use of letters as parameters in equations. Because of this, Viète is sometimes called "the father of modern algebraic notation". He was a lawyer by trade, and served as a privy councillor to both Henry III and Henry IV of France.

Text from the Wikipedia article François_Viète, licensed CC BY-SA 4.0.

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