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.
Ibn Jazla Abu ali Yahya ibn Isa Ibn Jazla Al Baghdadi or Ibn Jazlah (Arabic,أبو يحيى ابن عيسى بن جزله), Latinized as Buhahylyha Bingezla, was an 11th-century Arab physician of Baghdad and author of an influential treatise on regimen that was translated into Latin in 1280 AD by the Sicilian Jewish physician Faraj ben Salem.