Ahmad ibn Yusuf (835–912)
Born 835 CE, died 912 CE.
Abu Ja'far Ahmad ibn Yusuf ibn Ibrahim ibn Tammam al-Siddiq Al-Baghdadi (Arabic: أبو جعفر أحمد بن يوسف بن ابراهيم بن تمام الصديق البغدادي; 835–912), known in the West by his Latinized name Hametus, was a Muslim Arab mathematician, like his father Yusuf ibn Ibrahim (Arabic: يوسف بن ابراهيم الصدَيق البغدادي).
Text from the Wikipedia article Ahmad_ibn_Yusuf, licensed CC BY-SA 4.0.