Shams_al-Dīn_al-Samarqandī
Shams al-Din al-Samarqandi
Medieval Islamic astronomer and mathematician
Shams al-Dīn Muḥammad ibn Ashraf al-Ḥusaynī al-Samarqandī (Persian: شمس الدین سمرقندی; c. 1250 – c. 1310) was a 13th century Persian astronomer and mathematician from Samarkand, now in Uzbekistan.