Abu Sa'id al-Dharir al-Jurjani (), also Gurgani, was a 9th-century Persian mathematician and astronomer from Gurgan (Jurjan), Iran. He wrote a treatise on geometrical problems and another on the drawing of the

meridian Meridian or a meridian line (from Latin ''meridies'' via Old French ''meridiane'', meaning “midday”) may refer to Science * Meridian (astronomy), imaginary circle in a plane perpendicular to the planes of the celestial equator and horizon * ...

. George Sarton considers him a pupil of

Ibn al-A'rabi Abū ʿAbd Allāh Muḥammad ibn Ziyād (), surnamed Ibn al-Aʿrābī () (ca. 760 – 846, Sāmarrā); a philologist, genealogist, and oral traditionist of Arabic tribal poetry. A grammarian of the school of al-Kūfah, who rivalled the grammari ...

, but Carl Brockelmann rejects this opinion.

Works

Two of his works are extant: * Masa'il Hindisia (a manuscript is available in Cairo) * Istikhraj khat nisf al-nahar min kitab analima wa al-borhan alayh (available in Cairo, translated by Carl Schoy)

Sources

* H. Suter. ''Mathematiker'' (12, 1900). 845 deaths 9th-century Iranian mathematicians Year of birth unknown 9th-century Iranian astronomers People from Gorgan Persian physicists {{astronomer-stub

Works

See also

Sources