Al-ḤajjÄj ibn YÅ«suf ibn Maá¹ar
Al - Hajjaj ibn Yūsuf ibn Matar (Arabic الحجاج بن يوسف بن مطر, DMG al - Ḥaǧǧāǧ b Yūsuf b Matar, .. * before 809; † after 813) was an Arab mathematician, who was 786-833 in Baghdad and the earliest translator of Euclid's Elements from Greek into Arabic is.
The translation was (according to the Fihrist in the information in the preface to the manuscript in Leiden ) on behalf of Yahya ibn Khalid ibn Barmak, the sight of the Caliph Harun al - Rashid (reigned 786-809 ) of Baghdad, made (which is why it was called Haruni ), a second improved translation ( Ma'muni ) for the caliph al - Ma ʾ mun (reigned 813 to his death in 833 ). This produces the effect of data al - Haddschaj. From the second translation are six books of the elements in a codex in Leiden get (Codex Leidensis 399 ). The original Greek texts for translation were purchased from Byzantium. Another later Arabic translation of the elements Ishaq ibn Hunayn comes from (died 910), which was used by Thabit ibn Qurra for its output, and of Nasir ad-Din at- Tusi (d. 1274).
He also translated to 829 the Almagest of Claudius Ptolemy into Arabic, as already two other scholars ( the Syrian Nestorian scholar Hunayn ibn Ishaq ( Ishaq ibn Hunayn of the father ) and the Jewish scholar Sahl al -Tabari ).
His edition of the elements formed the basis of the first translation into Latin in the 12th century by Adelard of Bath. The output of Gerard of Cremona, however, uses the output of Thabit ibn Qurra, using an output, which included footage from al - Haddschadschs translation.