53-XX Differential geometry {For differential topology, see 57Rxx; for foundational questions of differentiable manifolds, see 58Axx} 132709
53Cxx Global differential geometry [See also 51H25, 58-XX] {For related bundle theory, see 55Rxx, 57Rxx} 78511
53C21 Methods of global Riemannian geometry, including PDE methods; curvature restrictions [See also 58J60] 5475