Karaji, Al-

Also known as  al-Karkhi,  in full,  Abu Bakr ibn Muhammad ibn al-Husayn al-Karaji  mathematician and engineer who held an official position in Baghdad (c. 1010–1015), perhaps culminating in the position of vizier, during which time he wrote his three main works, al-Fakhri fi'l-jabr wa'l-muqabala (“Glorious on algebra”), al-Badi‘ fi'l-hisab (“Wonderful on calculation”), and al-Kafi fi'l-hisab (“Sufficient on calculation”). A