riemann

noun

1. Ge·org Frie·drich Bern·hard [gey-awrk free-drikh bern-hahrt] /geɪˈɔrk ˈfri drɪx ˈbɛrn hɑrt/, 1826–66, German mathematician.

noun

1. Georg Friedrich Bernhard (ˈɡeːɔrk ˈfriːdrɪç ˈbɛrnhart). 1826–66, German mathematician whose non-Euclidean geometry was used by Einstein as a basis for his general theory of relativity

1. German mathematician who originated the non-Euclidean system of geometry that is now named after him. Riemann also studied optics and electromagnetic theory, and his work influenced Albert Einstein’s theory of General Relativity.