Equation Icon  ( ∫ ) 1- 4 4 ∘ ------∘ ------ abcd exp − 8 d x d y − g(x ) − g (y)[hab(x )]N (x,y)[hcd(y)] = ∫ ( ∫ ∘ ------ ) 𝒟ξ 𝒫[ξ]exp i- d4x − g(x)ξab(x )[hab(x )] , (32 ) 2