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Abu al-Qasim Maslama ibn Ahmad al-Majriti, known in European Latin-language sources as Methilem, was a Muslim Arab astronomer, alchemist, mathematician, economist and scholar in al-Andalus, active during the reign of Al-Hakam II. His full name is Abu 'l-Qāsim Maslama ibn Aḥmad al-Faraḍī al-Ḥāsib al-Maj̲rīṭī al-Qurṭubī al-Andalusī.
10th-century Muslim mathematician and scholar · From Wikipedia