How these are related: recover Ricci curvature by contracting Unsorted/Riemannian curvature, and you get scalar curvature by taking the trace of Ricci curvature.

Tools Needed: - Vectors - Tensors - Manifolds - Tangent Spaces - curvature - parallel transport - Unsorted/Riemannian curvature - covariant derivative - metric tensor - Einstein equations - The geodesics

See Ricci tensor and Riemannian curvature