Abu Ali al-Hassan al-Marrakushi (fl. 1281/2) was a Moroccan astronomer and mathematician.
He was especially important in the field of trigonometry. He described more
than 240 stars. He is the author of a very large compendium on spherical
astronomy and astronomical instruments (sundials, astrolabes) entitled ami’
al-mabadi' wa'l-ghayat. He wrote this treatise in Cairo. It was translated into
French by J. J. Sedillot in 1834. He also the author of Kitab al-Kotua
al-Makhrutia (conic sections).
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Mathematician
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