Claude Gaspar Bachet de Méziriac

Claude Gaspar Bachet Sieur de Méziriac was a French mathematician and poet born in Bourg-en-Bresse, at that time belonging to Duchy of Savoy. He wrote Problèmes plaisans et délectables qui se font par les nombres, Les éléments arithmétiques, and a Latin translation of the Arithmetica of Diophantus. He also discovered means of solving indeterminate equations using continued fractions, a method of constructing magic squares, and a proof of Bézout's identity.

9 October 1581

Born on the same birth day (9 October): Christopher Östlund • Craig Brackins • Einojuhani Rautavaara • Filip Bobek • James Fearnley • Jill Ker Conway • Laure Manaudou • Marie Kondo • Mick Young • October 9 • Omali Yeshitela • Quintin Hogg, Baron Hailsham of St Marylebone • Reichi Nakaido • Robert Wuhl • Thami Tsolekile • Vernon Fox • Walter O'Malley • Wesley So

Born in the same month (October 1581): Domenichino