Alias title: شرح تحرير المجسطي لنصير الدين الطوسي
Alias title:  تعبير التحرير
The Sharḥ Taḥrīr al-Majisṭī (Commentary on the Recension of the Almagest), composed ca  mid-1303, is a commentary on Naṣīr al-Dīn al-Ṭūsī’s Taḥrīr al-Majisṭī (Recension of the Almagest) of Ptolemy. Much of this work is devoted to observations of the obliquity of the ecliptic and to `Urḍī’s work on instrument construction. Also investigated is whether Venus and Mercury had been observed to transit the Sun in order to determine the position of the Sun with respect to Mercury and Venus. [Morrison, BEA]