German mathematician and physicist Bernhard Riemann (1September 82617-1July 20, 866) made important contributions in mathematical analysis and differential geometry, some of which paved the way for the development of general relativity. His name appears in Riemannian zeta function, Riemannian integral, Riemannian geometry, Riemannian lemma, Riemannian manifold, Riemannian mapping theorem, Riemannian-Hilbert problem, Riemannian thinking loop matrix and Riemannian surface. 1857, he gave a speech entitled "On Hypothesis as the Basis of Geometry" for the first time, which created Riemannian geometry and provided a mathematical basis for Einstein's general theory of relativity. 1857 was promoted to an adjunct professor at the University of G? ttingen, 1859 became a full professor after Dirichlet's death.