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  1. Competing Theories of Spherical Trigonometry

    Dr Nathan Sidoli In the medieval and early modern periods, the same group of individuals who developed new mathematical methods and theories were often ...


  2. Menelaus’ Spherics

    Dr Nathan Sidoli Mathematicians in medieval Islamic societies were the first to grasp the real significance of Menelaus’ Spherics. They followed Menelaus’ ...


  3. ʽAbd al-Raḥmān al-Ṣūfī and the Revision of Ptolemy’s Star Catalogue

    Prof. Julio Samso In AD 137, Ptolemy compiled a catalogue of forty-eight constellations containing 1022 stars. ʽAbd al-Raḥmān al-Ṣūfī revised ...


  4. Translating a Work of Higher Mathematics

    Dr Nathan Sidoli During the early ʿAbbāsid period (ninth century CE), a diverse group of scholars collaborated on the long-term project of translating ...


  5. Arabic Commentators on Ptolemy's Almagest

    Dr María José Parra Pérez- Independent Researcher Among pre-modern Arabic scholars, the Almagest was generally regarded as the most authoritative work ...


  6. The British Empire in the Gulf during the Second World War

    Dr Mark Hobbs An overview of Bahrain Political Agency files dealing with the impact of the Second World War on the Gulf region. In the Bahrain Political ...


  7. The Arabic Translations of Ptolemy's Almagest

    Prof. Paul Kunitzsch Around 150 AD Claudius Ptolemaeus wrote the great handbook of astronomy, later known as the Almagest, which became the prevalent ...


  8. Studying the Mathematical Sciences

    Dr Nathan Sidoli In medieval Islamic societies, education in the mathematical sciences was based not on solving problems, or producing new results, but ...


  9. The Latin Reception of the Arabic Tradition of the Almagest

    Dr Dirk Grupe Ptolemaic astronomy became known in mediaeval Europe mainly through translations from Arabic. Latin translations of the Almagest reflect ...


  10. Ibn al-Raqqām’s treatise on sundials

    Prof. Julio Samso During a period often characterised as one of decay and decline, the Andaluso-Tunisian astronomer Ibn al-Raqqām wrote his Risālah ...


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