Riemann’s Novel Lecture that Changed the Course of Geometry

That later set the stage for Einstein’s 

general theory of relativity

Albert Einstein revolutionized the early conceptions of gravity in 1915 when he presented a theory of general relativity which was based primarily on the fact that mass and energy warp the fabric of four-dimensional spacetime.

The credit for its underlying geometric or mathematical formulation goes to a mathematician named Georg Friedrich Bernhard Riemann who constructed a class of geometry (or elliptic geometry) that dealt with higher dimensions and hypersurfaces unlike Euclidean geometry (or flat geometry).

Bernhard Riemann (1826–1866) was a German mathematician who studied and served at the University of Göttingen. At Göttingen, he found a great teacher, Carl Friedrich Gauss (1777–1855), famous for his works in a wide range of areas in mathematics.

Source: cantorsparadise