Who covered the most disciplines, Abū Sahl al-Qūhī or Al-Farabi?
Abū Sahl al-Qūhī Abū Sahl Wayjan ibn Rustam al-Qūhī (al-Kūhī ; Persian: ابوسهل بیژن کوهی‎ ‎ "Abusahl Bijan-e Koohi") was a Persian mathematician, physicist and astronomer. He was from Kuh (or Quh), an area in Tabaristan, Amol, and flourished in Baghdad in the 10th century. He is considered one of the greatest Muslim geometers, with many mathematical and astronomical writings ascribed to him.
A. I. Sabra Abdelhamid I. Sabra (1924-2013) was a professor of the history of science specializing in the history of optics and science in medieval Islam. He died December 18, 2013. Sabra provided English translation and commentary for Books I-III of Ibn al-Haytham's seven book "Kitab al-Manazir" ("Book of Optics"), written in Arabic in the 11th century.