Ibn Sahl

Ibn Sahl was a geometer who worked in the late 10th century. Although he is not mentioned in the known biobibliographical sources from the medieval period, Ibn Sahl is mentioned by Ibn al‐Haytham, whose working life spanned the late 10th and early 11th centuries. On the other hand, he commented on one of Abū Sahl al‐Kūhī’s treatises, and Kūhī probably died before the end of the 10th century.

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