Jābir ibn Aflaḥ: Abū Muḥammad Jābir ibn Aflaḥ
Flourishedprobably Seville, (Spain), twelfth century
Jābir ibn Aflaḥ was a mathematician and astronomer in twelfth-century Andalusia, who wrote a treatise entitled Iṣlāḥ al-Majisṭi (Correction of the Almagest) in which, as the title suggests, the author made a long series of criticisms and corrections of Ptolemy’s main astronomical treatise.
Little is known of Jābir’s life. It seems that he was from Seville, since he is referred to in several sources as al-Ishbīlī. One of these sources is Maimonides; in his Guide for the Perplexed, he claims to have met Jābir’s son. This reference suggests that Jābir was alive sometime between the end of the eleventh century and the first half of the twelfth century.
Jābir’s main work is a commentary on Ptolemy’s Almagest, a treatise that he had seen in two translations from the Greek. The Almagestis both the great synthesis and the culmination of mathematical astronomy of the ancient world, composed in Alexandria in the second century. It was...
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