Equation Icon  ˙0 0 0 0 0¯0 ψ 2 = − ∂ ψ3 + σ ψ 4 + k ϕ2ϕ2, (56) ψ˙01 = − ∂ ψ02 + 2σ0ψ03 + 2k ϕ01¯ϕ02, (57) ˙0 0 0 0 0¯0 ψ 0 = − ∂ ψ1 + 3σ ψ 2 + 3k ϕ0ϕ2, (58) ϕ˙01 = − ∂ ϕ02, (59) ˙0 0 0 0 ϕ 0 = − ∂ ϕ1 + σ ϕ2; (60) k = 2Gc− 4. (61)