Surprised you didn't mention Al'Khwarizmi (~790-850 AD).
An Arab mathematician whose name is the source of the word algorithm. In 730 AD he wrote Al-jabr wa'l muqabalah, a treatise os solving quadratics. Al-jabr is where the word algebra comes from. His book about how the Hindus wrote down numbers (after later being translated to Latin) is why we call 0.1....9 Arabic numerals.
Alex
Men never do evil so completely and cheerfully as when they do it from religious conviction. -- Blaise Pascal (1623-1662)