Jacobi Field: Riemannian Geometry, Vector Field, Geodesic

Projective Vector Field: Field, Riemannian Manifold, Geodesic (general relativity)

Congruence (manifolds): Smooth Manifold, Integral Curve, Vector Field, Riemannian Geometry

Vector Flow: Mathematics, Differential Topology, Riemannian Geometry, Lie Group, Field, Flow (Mathematics)

Geodesic Convexity: Mathematics, Riemannian Geometry, Convex Set