Definitions for "Abu'l Hasan ibn Ali al Qalasadi"
Abu'l Hasan ibn Ali al Qalasadi (1412-1486) was an Arab mathematician known for being one of the most influential voice in algebraic notation since antiquity. He wrotes numerous books on arithmetic and algebra, including al-Tabsira fi'lm al-hisab (Arabic , التبصير في علم الحساب)(Clarification of the science of arithmetic).