Equation Icon  √--∫ √ -- − 2 dx ¯gC¯αℳ [¯g + f, ¯g]α β C β, (4.11 ) with ℳ [g,¯g]αβ = ¯gα ρg¯σλ¯∇ λ(g ρβ∇ σ + gσβ∇ ρ) − ¯gρσ¯gαλ¯∇ λgσβ∇ ρ, (4.12 )