A notice indicates we here see several people (mathematicians, philosophers, authors) , who were not contemporaries, i.e. Harezmi (780-850), Al-Biruni (973-1048), Al-Farabi (870-950), Inb-I Sina (980-1037), Yusuf Has Hacia Hacib (1017-1077).
Copyright Dick Osseman. For use see my Profile.