Alī ibn Ahmad al-Nasawī

Alī ibn Aḥmad al-Nasawī was a Persian mathematician from Khurasan, Iran. He flourished under the Buwayhid sultan Majd al-dowleh, who died in 1029-30AD, and under his successor. He wrote a book on arithmetic in Persian, and then Arabic, entitled the "Satisfying on Hindu Calculation". He also wrote on Archimedes's Book of Lemmas and Menelaus's theorem, where he made corrections to the Book of Lemmas as translated into Arabic by Thabit ibn Qurra and last revised by Nasir al-Din al-Tusi.