Linda Hall Library 960s births 1040 deaths 10th-century mathematicians 11th-century astronomers 11th-century mathematicians Scholars under the Buyid dynasty Mathematicians from the Fatimid Caliphate Iraqi astronomers Mathematicians under the Buyid dynasty Iraqi scientists Engineers of the medieval Islamic world Medieval physicists Philosophers of the medieval Islamic world Philosophers of science Natural philosophers People from Basra Precursors of photography Scientists who worked on qibla determination Inventors of the medieval Islamic world History of scientific method History of optics 11th-century inventors