rewardrewritingrhombrhombicrhombohedronrhomboidrhombusrhomobidalribriccati equationricci tensorridgeriemann christoffel tensorriemann conditionriemann continuation theoremriemann function of the cauchy proriemann function of the cauchy problemriemann integrableriemann integralriemann lebesgue lemmariemann mapping theoremriemann non euclidean geometryriemann roch theoremriemann spaceriemann sphereriemann stieltjes integralriemann sumriemann surfaceriemann surfacesriemann theoremriemann theta functionriemann zeta functionriemannian christoffel tensorriemannian geometryriemannian manifoldriemannian metricriemanninan manifoldriesz fischer theoremriesz spacerightright adjoint linear mappingright angleright angle trapezoidright angled triangleright annihilatorright ascensionright bodyright circularright circular coneright circular cylinder