Equation Icon  [ β′′ α′ ( b) 2 2 b Uαβ′′u = g α uα′ + 2r 1 − rabΩ aα′ + 2r ˙aα′ + r R α′0b0Ω ] -1- 2( a a b) 3 + 12 r R00 − 2R0aΩ + RabΩ Ω uα′ + O (r ) , (18.33 )