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Abu Sa'id Ahmed ibn Mohammed ibn Abd al-Jalil al-Sijzi (c. 945 - c. 1020, also known as al-Sinjari and al-Sijazi; Persian: ابوسعید سجزی; Al-Sijzi is short for "Al-Sijistani") was an Iranian Muslim astronomer, mathematician, and astrologer.
Al-Sijzi was an Islamic astronomer and mathematician who wrote on the geometry of spheres. Biography. Al-Sijzi's full name is Abu Said Ahmad ibn Muhammad ibn Abd al-Jalil al-Sijzi.
Abu Ya'qub Ishaq ibn Ahmad al-Sijistani (Arabic: أبو يعقوب إسحاق بن أحمد السجستاني) or al-Sijzi (السجزي) was a 10th-century Persian Ismaili missionary active in the northern and eastern Iranian lands.
Persian mathematician and astrologer who considered a number of challenging geometric problems. Notable among his works is Book of the Measurement of Spheres by Spheres, in which he presented 12 theorems involving a large sphere containing between one and three smaller spheres.
Abu Sa’id Ahmed ibn Mohammed ibn Abd al-Jalil al-Sijzi; (c. 945 – c. 1020, also known as al-Sinjari and al-Sijazi ; Persian: ابوسعید سجزی ; Al-Sijzi is short for “Al-Sijistani”) was an Iranian Muslim astronomer, mathematician, and astrologer.
Overview. Sijzi, Abu Said Ahmad ibn Muhammad ibn abd al-Jalil al- (c. 945—1010) Quick Reference. ( c .945– c .1010) Prolific geometer and astronomer who lived in Sijistan and Khurasan. Al-Sijzi composed about 40 geometrical works and about 20 in astronomy and astrology. Many of the latter were enhanced ...
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In his Kitāb al-qirānāt, which treats general astrology and its history, he used Sassanid material and sources from the time of Hārūn al-Rashīd and from the late Umayyad period. In Zā’irjāt, a book on horoscopes, he gave tables based on Hermes, Ptolemy, Dorotheus, and “the moderns.”.
