Arab mathematician and astronomer born in Harran, Mesopotamia, now Turkey, famous for his studies of mathematics applied to astronomy and physical astronomy. After studying mathematics and medicine in Baghdad, he returned to Harran, but his liberal philosophy and religious concepts did so. to be accused of a heretic and, to escape persecution, he returned to Baghdad, where he was hired as an astronomer at the court of the Caliph. al-Mu'tadid. With his talent in foreign languages, he dedicated himself to the translation of classics of the Greek sciences into Arabic, such as Euclid's Elements, including contributing to the preservation of the texts of great Greek authors until our days such as Pythagoras, Archimedes, Papus, Plato, Aristotle, etc.
He worked with plane geometry and number theory. He also wrote about astronomy as in Concerning the Motion of the Eighth Sphere, where he dealt with the equinoxes and the Sun. In Kitab fi'l-qarastun he dealt with mechanics and demonstrated several theorems about centers of gravity and equilibrium. of loads and scales, and this book was translated into Latin by Gerard de Cremona and became very popular. Finally, he started writing about philosophy and other topics such as logic, psychology, ethics, classification of the sciences, Syrian grammar, politics, the symbolism,
religion, customs of the Sabians, etc. He died in Baghdad, now in Iraq. His son, Sinan ibn Thabit, and his grandson, Ibrahim ibn Sinan ibn Thabit, were also eminent mathematicians, but inferior to their father-grandfather.
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Order A - Biography - Brazil School
Source: Brazil School - https://brasilescola.uol.com.br/biografia/al-sabi-thabit-ibn.htm