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Ibn al-Banna al-Marrakushi al-Azdi also known as Abu'l-Abbas Ahmad ibn Muhammad ibn Uthman al-Azdi. (Arabic: ابن البنّا) [29) December 1256 – c. 1321) was an Arab mathematician and astronomer. The crater Al-Marrakushi on the Moon is named after him.
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Al-Banna, the son of an architect, was born in Marrakesh in 1256[1]. Having learned basic mathematical and geometrical skills he proceeded to translate Euclid's Elements into Arabic[1].
Al-Banna wrote between 51 to 74 treatises, encompassing such varied topics as Algebra, Astronomy, Linguistics, Rhetoric, and Logic. One of his works, called Talkhis amal al-hisab (Arabic, تلخيص عمل الحساب ) (Summary of arithmetical operations), includes topics such as fractions, sums of squares and cubes etc. Another, called Tanbih al-Albab [2], covers topics related to:
Yet another work by al-Banna was Raf al-Hijab (Lifting the Veil) which included topics such as computing square roots of a number and theory of continued fractions.[1] This work was also the first mathematical work since Brahmagupta to use an algebraic notation, which was then further developed by his successor Abū al-Hasan ibn Alī al-Qalasādī two centuries later.[3]