Equation Icon  ρ˙ℰ + 4Θ ρℰ + ⃗∇ μqℰ+ 2Aμqℰ + σ μνπℰ = 0, (121 ) 3 μ μ μν ℰ 4- ℰ 1⃗ 4- ⃗ν ℰ ν ℰ ν ℰ να ℰ (ρ +-p)⃗ q˙⟨μ⟩ + 3 Θq μ + 3∇ μρℰ + 3 ρℰA μ + ∇ π μν + A πμν + σμ qν − 𝜀μ ω νqα = − λ ∇ μρ. (122 )