In Tabrīz (ca 1306), Nīsābūrī studied Shīrāzī (d. 1311). Ilkhanid ministers patronized Nisaburi's scientific work. Dedicated Sharḥ to: Khawāja Sa`d al-Dīn Muḥammad Ibn `Alī Sāwajī, the chief minister under the Ilkhanid Sultan Ghāzān (r. 1295-1304). He dedicated the Tawḍīḥ to: `Ali ibn Maḥmūd al-Yazdī. Two reports attest to the Tawḍīḥ studied at Ulugh Beg's (d. 1449) madrasa in Samarqand, for the Tadhkira [BEA, Morrison]