Yusuf ibn Ahmad al-Mu'taman ibn Hūd was an Arab Mathematician and a member of the Banu Hud family, al-Mu'taman ruled Zaragoza from 1081 to 1085. Where the Banu Hūd family kept their rule until 1100. Saragossa, which encompasses modern day Aragon, Spain, had its early influence from the Roman Empire. In medieval Islam there was a wave of translations of ancient Greek and Roman texts. Ranging from philosophy, to medicine, to astronomy, and the more influential mathematical translations. Yusuf son to the king, Ahmad ibn Sulayman al-Muqtadir. His father Ahmad was known for philosophy, astronomy, as well as translations of mathematics. Both father and son, as well as medieval Islamic translators such as the Banū Mūsā were known for their expansions on ancient Greek and Roman ideals. There was a stigma in the periods following medieval Islam that Islamic translators only copied the ancient texts, offering no intellectual addition. Later it is proven that translators such as Ibn Sīnā and Yusuf offered copious and revolutionary input into their expansion on ancient ideas. Yusuf ibn Ahmad al-Mu'taman ibn Hūd wrote a mathematical treatise called Kitab al-Istikmāl (Arabic,كتاب الإستكمال, Perfection or Comprehensive Treatise) in  mathematics, where it was edited by Maimonides (ca. 1135 – 1204).