Equation Icon  α′ β′ ( α′)( β′) p˙a(u) = − σα′β′ea u − σα′u aβ′e a 1 2 3 = − raa − --r Sa + O(r ), 3α′ β′ γ′ ( α′ β′ α′)( γ′) α′β′ ( α′)( β′) ¨pa(u) = − σα′β′γ′ea u u − 2σα′β′u u + σα′a aγ′ea − σα′β′e a a − σα′u ˙aβ′ea ( b) 1 b 2 = 1 + rabΩ aa − r˙aa + 3rRa0b0Ω + O (r ), (3) α′ β′ γ′ δ′ ( α′ β′ γ′ α′ β′ α′ α′ β′)( δ′) pa (u) = − σα′β′γ′δ′ea u u u − 3σα′β′γ′u u u + 6σ α′β′u a + σ α′˙a + σα′u ˙aβ′u a δ′ea − σ ′ ′′eα′(2aβ′u γ′ + uβ′aγ′) − (3 σ ′′uα′uβ′ + 2σ ′aα′)( ˙a ′eγ′) − σ ′′eα′˙aβ′ (α βγ ′a)( ′) αβ α γ a αβ a − σα′uα ¨aβ′eβa = 2a˙ + O (r). a