Abu al-Qasim Ibn al-Saffar al-Andalusi

Abu al-Qasim Ahmad ibn Abd Allah ibn Umar Ibn al-Saffar al-Andalusi was a mathematician, geometer, astronomer and physician who studied at Cordoba under Maslama al-Majriti, then moved to Denia and stayed there until his death; he excelled so much in geometry that he was called "the geometer", and made observations of the movements of the stars. ¹

According to the book, the Arabic sources give his death as 426/1035, though it notes that al-Maqqari mentions him as alive at a later date, and Sa'id al-Andalusi includes him in Tabaqat al-umam. ¹ His works include an abridged zij on the Sindhind system and Tuhfat al-tullab fi al-amal bil-asturlab. ¹