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Al-Abbās ibn Said al-Jawharī

Al-ʿAbbās ibn Saʿid al-Jawharī (Arabic: العباس بن سعيد الجوهري; c. 800 – c. 860), known as Al-Jawhari, was a geometer who worked at the House of WisdominBaghdad and for in a short time in Damascus, where he made astronomical observations. Born (and probably dying) in Baghdad, he was probably of Iranian origin.^{[1][page needed]} His most important work was his commentary on Euclid's Elements, which contained nearly 50 additional propositions and an attempted mathematical proof of the parallel postulate.^{[citation needed]}

Described as having superb knowledge of Greek, which was unusual for a Muslim scholar), Al-Jawhari is credited with a translation into Arabic of the Indian polymath Shanaq al-Hindi's Book of Poisons.^[2]

• Selin, Helaine (1997). Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures. Berlin; New York: Springer Nature. ISBN 978-1-4020-4960-6.
• Treiger, Alexander (2022). "From al-Biṭrīq to Ḥunayn: Melkite and Nestorian Translators in Early ʿAbbāsid Baghdad". Mediterranea. 7: 143–181. doi:10.21071/mijtk.v7i.13666. S2CID 247928028.

• De Young, Gregg (1997). "Al-Jawhari's additions to Book V of Euclid's Elements". Zeitschrift für Geschichte der Arabisch-Islamischen Wissenschaften. 11 (10): 153–178.
• Bolt, Marvin (2007). "Jawharī: al-ʿAbbās ibn Saʿīd al-Jawharī". In Thomas Hockey; et al. (eds.). The Biographical Encyclopedia of Astronomers. New York: Springer. pp. 591–2. ISBN 978-0-387-31022-0. (PDF version)
• Sabra, Abdelhamid I. (1973). "Al-Jawharī, Al-'Abbās Ibn Sa'īd". Dictionary of Scientific Biography. Vol. 7. pp. 79–80.
• O'Connor, John J.; Robertson, Edmund F. (November 1999), "al-Abbas ibn Said Al-Jawhari", MacTutor History of Mathematics Archive, University of St Andrews

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