Everything about Al-sijzi totally explained
Abu Sa'id Ahmed ibn Mohammed ibn Abd al-Jalil al-Sijzi (short for al-Sijistani) was a
Persian astronomer and
mathematician.
Sijistan from the word
Sagz is a region in southeast and east in current Iran. It is mentioned in abundance in the
Shahnama.
Al-Sijzi is thought to have been born around
945 CE, and lived through about
1020. His main scientific focus was astronomy. He had a deep knowledge of literature which he used to his advantage. He dedicated work to
'Adud al-Daula and the prince of
Balkh. He also worked in Shiraz making astronomical observations from 969-970. He also did a lot of geometry work.
Astronomy
Al-Biruni wrote that al-Sijzi believed in a
heliocentric system in which the Earth was moving and that he invented an
astrolabe called the "Zuraqi" based on this idea:
Mathematics
Sijzi was a mathematician who made a special study of the intersections of conic sections and circles. He replaced the old kinematical
trisection of an angle by a purely geometric solution (intersection of a circle and an equilateral hyperbola.)
Further Information
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