ibn Sinan (908–946), Al-Mahani also wrote a treatise on calculating the ascendant using a solar clock. See also List of Iranian scientists References Citations Work cited Roshdi Rashed and Athanase Papadopoulos, Menelaus' Spherics: Early Translation and al-Mahani'/al-Harawi's version (Critical edition of Menelaus' Spherics from the Arabic manuscripts, with historical and mathematical commentaries), De Gruyter, Series: Scientia Graeco-Arabica, 21, 2017, 890 pages. 880s deaths 9th-century Iranian mathematicians 9th-century Iranian astronomers Astronomers from the Abbasid Caliphate Astronomers of the medieval Islamic world Mathematicians from the Abbasid Caliphate People from Kerman Province