Arabs' Contribution to Mathematics: The great Arab mathematician Hua Lazimi developed algebra into an independent branch of mathematics, and his book Science of Reduction to Objects became a masterpiece in the history of mathematics. He himself is also known as the father of algebra, and his works are textbooks of three major European universities in the16th century. Other Arab mathematicians have also made great achievements in trigonometry. They developed trigonometry into an independent discipline, and calculated pi to 17 digits, breaking the record of 1000 kept by China mathematician Zu Chongzhi. In geometry, they linked figures with algebraic equations and became pioneers in analytic geometry. Later, Descartes' analytic geometry was also realized on the basis of Arabs. The greatest contribution of Arabs to science is to develop perfect algebra by using Arabic numerals as tools and combining the logic of ancient Greece. Today, the word "algebra" comes from Arabic (JABR).