Cardano Publishes Practica Arithmeticae

1539

The Italian polymath Girolamo Cardano published a treatise on arithmetic that hinted at solutions to cubic equations. Within a few years he would publish the full solutions in the Ars Magna, having extracted them from Tartaglia under oath. The resulting feud was Italian mathematics' most famous quarrel. His later Ars Magna included the cubic equation's general solution, one of the Renaissance's most important mathematical achievements.