The Arabic textual traditions of Euclid's elements

SummariesRecently completed studies of book V and books VII-IX of the Arabic versions of Euclid's Elements indicate the necessity for a revision of the standard view of the Euclidean tradition in the Islamic world. Newly discovered manuscripts show that we have two distinct versions, each attributed to Ishāq ibn Hunayn (in the revision of Thābit ibn Qurrah) although the received tradition does not distinguish the two. A newly analyzed anonymous translation (now in Lenin-grad) appears to have ties to the lost translations of al-Hajjāj and may provide important information for reconstructing the main features of these lost versions