Equation Icon  ˙ ( 2) ¯αμ + 1 − 3cs H ¯αμ = 0, [ ] (349 ) ¯˙ ¯ 2- ( 2 ) ρ-ℰ 2ρ- βμ + (1 − 3w )H βμ = 3 H 4 3cs − 1 ρ − 9(1 + w ) λ ¯α μ. (350 )