Source: wikibot/hadamard-manifold
= Hadamard manifold
{wiki=Hadamard_manifold}
A Hadamard manifold is a type of Riemannian manifold that is both complete and simply connected, and that has a non-positive curvature. More precisely, it is a space where the geodesic triangles are "thin," meaning that the distance between points on the triangle is less than or equal to the distance between corresponding points in the Euclidean space.