Al-Sijzi

Abu Sa'id Ahmed ibn Mohammed ibn Abd al-Jalil al-Sijzi (short for al-Sijistani) was a Persian mathematician.

He 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.)

Sources

Suter: Die Mathematiker und Astronomen der Araber (80-81, 224, 1900).

See also

• List of Iranian scientists

External Link

Sijzi's Biography on St Andrew's School of MAthematics in Scotland