Equation Icon  ′′ ′′ ′′ ′[ 1 1 ( ) ] U αβ′′;γ′′uβ uγ + U αβ′′aβ = gαα aα′ + 2r˙aα′ + -rR α′0b0Ωb + --r R00 − R0bΩb uα′ + O (r2) ,(18.34 ) 2 6