2 known teachers: `Abd al-Ghāfir ibn Muḥammad al-Faraḍī, who wrote a treatise on farā’īḍ , and  `Alī ibn Muḥammad ibn Abī `Īsā al-Anṣārī, who is reported to have known astronomy; Founder of school of Andalusian astronomers in which the disciplines of arithmetic and geometry were also cultivated. His disciples included Ibn al-Samḥ, Ibn al-Ṣaffār and Ibn Barghūth and spanned three generations greatly influencing the development and expansion of the exact sciences throughout Andalusia. Majrīṭī’s major work in astronomy was the adaptation of Khwārizmī’s Sindhind zīj together with Ibn al-Ṣaffār. [J. Casulleras]