Equation Icon  4- μ ℰ μ ℰ μν ℰ ρ˙ℰ + 3Θ ρℰ + ⃗∇ qμ + 2A qμ + σ πμν = 1 [ ---3π μν ˙πμν + 3(ρ + p)σμνπμν + Θ (2qμqμ + πμνπ μν) + 6A μqνπμν 2λ ] − 2qμ⃗∇ μρ + 3qμ⃗∇ νπμν + 3πμν∇⃗μqν + 3σμνπ αμπνα − 3σμνqμq ν . (117 )