Equation Icon  ∗ a b ℰ := ℰabΩ Ω , (10.62 ) ℰ∗ := (δ b− Ωa Ωb)ℰbcΩc, (10.63 ) a∗ a c c ∗ ℰ ab := 2ℰab − 2ΩaℰbcΩ − 2Ωb ℰacΩ + (δab + Ωa Ωb)ℰ , (10.64 ) ℬ∗a := 𝜀abcΩb ℬcdΩd, (10.65 ) ∗ c d ( e e ) c d ( e e ) ℬ ab := 𝜀acdΩ ℬ e δ b − Ω Ωb + 𝜀bcdΩ ℬ e δ a − Ω Ωa . (10.66 )