Abū Barza, al-Faḍl b. Muḥammad b. ʿAbd al-Ḥamīd b. Wāsiʿ b. Turk al-Khuttalī was a Muslim mathematician of the late 3rd/9th to early 4th/10th century and a contemporary of Abū Kāmil Shujāʿ b. Aslam (q.v.). He was from Khuttal, a region around the sources of the Oxus River, to the south of Farghāna and west of Chinese Turkistan; certain sources refer to him as the grandson of Turk al-Jīlī instead of Turk al-Khuttalī (see Sayili, 87). Our knowledge of his life is confined to the important information presented by Abū Kāmil in his introduction to al-Waṣāyā bi …