Sharaf al-Dīn al-Muẓaffar ibn Muḥammad ibn al-Muẓaffar al-Ṭūsī (Persian: شرفالدین مظفر بن محمد بن مظفر توسی; c. 1135 – c. 1213) usually shortened to Sharaf al-Dīn al-Ṭūsī, was a Persian mathematician and astronomer of the Islamic Golden Age.
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