作者: Werner Ballmann , Patrick Eberlein
关键词: Riemannian manifold 、 Rank (differential topology) 、 Mathematics 、 Symmetric space 、 Sectional curvature 、 Scalar curvature 、 Mathematical analysis 、 Covering space 、 Pure mathematics 、 Curvature 、 Fundamental group
摘要: … Riemannian manifold M of nonpositive sectional curvature is … (1) the sectional curvature is nonpositive and bounded from … Manifolds of rank one resemble manifolds of strictly negative …