Niccolò Fontana Tartaglia, Tartaglia also spelled Tartalea, (born 1499, Brescia, republic of Venice [Italy]—died Dec. 13, 1557, Venice), Italian mathematician who originated the science of ballistics.
During the French sack of Brescia (1512), his jaws and palate were cleft by a sabre. The resulting speech difficulty earned him the nickname Tartaglia (“Stammerer”), which he adopted. He settled in Venice in 1534 as a teacher of mathematics.
Tartaglia’s Nova Scientia (1537; “A New Science”), a treatise on gunnery, is an important pioneering effort to establish the laws of falling bodies. Soon after the publication of this work, Tartaglia was asked by Girolamo Cardano, physician and lecturer in Milan, to publish his solution to the cubic equation. Tartaglia refused at first, but later, in the hope of becoming artillery adviser to the Spanish army, he confided in Cardano, who published the solution in his Ars magna (“Great Art”). Tartaglia’s best-known work is Trattato di numeri et misure, 3 vol. (1556–60; “Treatise on Numbers and Measures”), an encyclopaedic treatment of elementary mathematics. He also published translations of Euclid and Archimedes.