Leibniz, Gauss, Riemann and Hilbert are Germans, Fermat, Cauchy, Lagrange, Laplace, Leberg and Jordan are French, and Euler and Bernoulli are Swiss. Europe used to be the center of mathematics in the world, but later influenced by World War II, the United States attracted a large number of mathematics talents. Modern mathematics in China started late, but there are also some international mathematicians. However, according to the proportion of the population, it does not count.