Equation Icon  ∫ ---1--- 4 ′ μν,αβ ′ ′ 1- μν 16πG d x L (o) (x − x )hαβ(x ) + 2T (β) ∫ N ( ) + d4x′ H μν,αβ(x − x ′) − Dμν,αβ(x − x′) hαβ(x′) + ξμν(x ) = 0, (210 )