Riemannian geometry

== English == === Etymology === From Riemannian + geometry, after German mathematician Bernhard Riemann. === Noun === Riemannian geometry (usually uncountable, plural Riemannian geometries) (mathematics, geometry) The branch of differential geometry that concerns Riemannian manifolds; an example of a geometry that involves Riemannian manifolds. Elliptical or spherical geometry. ==== Translations ====