KnowraRiemannian manifoldLinked fromLinked fromThe 23 pages that link to Riemannian manifold, each with the reason it gives.All 23Broader topic 4Narrower topic 16Compared with 3Riemann surfaceCompared with: Its metric geometry differs from the conformal structure that defines a Riemann surface.Symplectic manifoldCompared with: It measures lengths and angles, unlike a symplectic form's pairings.3-manifoldCompared with: A 3-manifold is defined topologically and need not come with a metric or smooth structure.