Abroad: Newton. None of them. Newton binomial theorem, Newton series, Newton flow method, Newton calculus, Newton analytic geometry. . . . . . Although Newton was a physicist, he also had a lot of pioneering work in mathematics, which was unprecedented. Although later there were successors Euler, Hilbert, Hardy and so on. It is great that Newton was able to do these jobs without the work of his predecessors.

The greatest mathematician in the 20th century is Corgo Molov, which is unanimously affirmed by foreign mathematicians, because his work in axiomatization of probability theory is enough to make him go down in history.

Domestic: China, Chen Jingrun, Xiang Wuyi, Wu Wenjun. . . . . . Personally, I think it is Wu Wenjun, because his Wu algorithm is a machine algorithm written into university textbooks, including foreign textbooks, which has the greatest influence. Of course, Hua's historical position is the highest, and he has a high reputation at home and abroad.