Equation Icon  hRtt = Aˆ(1,0) + sAˆ(i1,1)ωi + O (s2), (22.80 ) R (1,0) ( (1,1) (1,1) i j (1,1) i) 2 hta = Cˆa + s ˆB ωa + Cˆai ω + 𝜖aiDˆj ω + O (s ), (22.81 ) ( ) hRab = δabKˆ(1,0) + Hˆ(a1b,0)+ s δab ˆK (1i,1)ωi + Hˆ(a1,bi1)ωi + 𝜖ij(aˆI(b1)j,1)ωi + ˆF(⟨1a,1)ωb⟩ + O(s2). (22.82 )