Uppsala, Universitetsbibliotek O Vet 20,
Kitāb Ūqlīdīs fī al-Uṣūl, كتاب أوقليديس في الأصول , Isḥāq-Thābit version, completed in Muharram 434, August-September, 1042

fol 41v, figure IV.2

α                ©

Uppsala, Universitetsbibliotek O Vet 20,
Kitāb Ūqlīdīs fī al-Uṣūl, كتاب أوقليديس في الأصول , Isḥāq-Thābit version, completed in Muharram 434, August-September, 1042

fol 42, figure IV.3

α                ©