Equation Icon  [( b 4-2 b 1- 2 ) 2-2 1- 2 3] a ∂αradv = 1 + rabΩ + 3r ˙abΩ + 3 r S Ωa + 3r a˙a + 6 r Sa + O (r ) eα [ 1 ] + − raa Ωa −--r2S + O (r3) e0α, (11.15 ) 2