Equation Icon  [ ] U ′′ u α′uβ′ = gα′ gβ′gγ′ − r(R ′ ′ + R ′ ′ Ωd)u ′ + O (r2) , (19.36 ) αβαβ ;γ (α β) γ α0γ 0 α0γ d β α′ β′ γ′ α′ β′[ d 2 ] Uαβα′β′;γ′u u u = g (αgβ) rR α′0d0Ω uβ′ + O (r ) , (19.37 )