KnowraHyperbolic planeLinked fromLinked fromThe 9 pages that link to Hyperbolic plane, each with the reason it gives.All 9Broader topic 4Related 3Compared with 2Riemannian manifoldBroader topic: It contrasts sharply with the sphere through its negative curvature and geodesic geometry.Parallel postulateBroader topic: Its geometry realizes the case where many parallels pass through an exterior point.Nikolai LobachevskyBroader topic: It is the setting for the geometric properties Lobachevsky studied.Selberg trace formulaBroader topic: It is the basic space on which the groups in the classical formula act.