Abū al-Ḥasan al-Ahwāzī, Aḥmad b. al-Ḥusayn, was a Persian mathematician and astronomer of the 4th/10th and 5th/11th centuries. There is no information regarding the dates of his birth and death or the particulars of his life, although on the basis of his name it may be assumed that he was born in Ahwāz in Khūzistān (Qazwīnī, 152–153). His name is recorded in some manuscripts of Sharḥ al-maqāla al-ʿāshira li-Uqlīdis as al-Ahwāzī, which led Jung, De Goeje and Ahlwardt to make the assumption, based on the index to Kashf al-ẓunūn edited by Flügel, that he and ʿAbd Allāh b. Hilāl al-Ahw…