Unique torsion-free metric-compatible connection ∇. Christoffel symbols Γ^k_{ij} = ½g^{kl}(∂_i g_{jl} + ∂_j g_{il} − ∂_l g_{ij}).
Unique torsion-free metric-compatible connection ∇. Christoffel symbols Γ^k_{ij} = ½g^{kl}(∂_i g_{jl} + ∂_j g_{il} − ∂_l g_{ij}).