A 9th-century Text

The most celebrated mathematician in the ‘Abbasid period was Khwarizmi, whose name was butchered enough in the West to give us the word “algorithm.” He is also credited with introducing numerals from India into the Arabic-speaking world, whence they entered Europe as “Arabic numerals.” He was from Central Asia, but lived in Baghdad. This manuscript is a 14th-century copy of his text on quadratic equations.