Equation Icon  1 ( ) (𝒫(t)|𝒫(t)) = -- gac(t)gbd(t) − gab(t)gcd(t) ∂gab(t)∂gcd(t) 4 + -1--𝒟 𝒜a1a2a3(t)𝒟 𝒜 (t) + --1--𝒟 𝒜a1⋅⋅⋅a6(t)𝒟 𝒜 (t) 2 ⋅ 3! a1a2a3 2 ⋅ 6! a1⋅⋅⋅a6 = 0. (9.140 )