Riemann

[ree-mahn; English ree-mahn, -muh n] /ˈriˌmɑn; English ˈri mɑn, -mən/
noun
1.
Georg Friedrich Bernhard
[gey-awrk free-drikh bern-hahrt] /geɪˈɔrk ˈfri drɪx ˈbɛrn hɑrt/ (Show IPA), 1826–66, German mathematician.
Related forms
Riemannian
[ree-mah-nee-uh n] /riˈmɑ ni ən/ (Show IPA), adjective
British Dictionary definitions for Riemann

Riemann

/German ˈriːman/
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
Derived Forms
Riemannian, adjective
Riemann in Science
Riemann
  (rē'mən, -män')   
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.