Equation Icon  ( ) ρ-- ρℰ- ρtot = ρ 1 + 2λ + ρ , (104 ) ρ ρℰ ptot = p +---(2p + ρ) + --, (105 ) tot ℰ 2 λ 3 qμ = qμ, (106 ) πtot= π ℰ . (107 ) μν μν