Cardan, Jerome[kah(r)dan, kah(r)dahnoh], Ital Geronimo Cardano, Lat Hieronymus Cardanus
Mathematician and physician, born in Pavia, Italy. He became professor of mathematics at Padua, and of medicine at Pavia and Bologna. He wrote over 100 treatises on physics, mathematics, astronomy, astrology, rhetoric, history, ethics, dialectics, natural history, music, and medicine. His Ars magna (1545, Great Art) was influential in the development of algebra, giving the first published algebraic solution of cubic and quartic equations.