Al-ʿAbbās ibn Saʿid al-Jawharī (c.
800 Baghdad? – c. 860 Baghdad?) was a geometer
who worked at the House of Wisdom in Baghdad and for in a short time in
Damascus where he made astronomical observations. He was probably of Iranian
origin. His most important work was his Commentary on Euclid's Elements which
contained nearly 50 additional propositions and an attempted proof of the
parallel postulate.
Al-Abbas ibn Said al-Jawhari was an an Arab mathematician. He lived and
worked in Damascus and Baghdad. He is known for writing a book, Commentary on
Euclid’s Elements. We know little of al-Jawhari’s life except that he was
associated with the remarkable House of Wisdom that was set up in Baghdad by
the Caliph al-Ma’mun.
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Mathematician
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