Equation Icon  ( ) (√ --- ) 1√ --- √--- ∑ δ − gΛ = -- − g (Ψg μν + [Ψ − Λ ]uμuν) δgμν − − g ( f xν) ξν + 2 x= {n,s} ( ) ∇ ( 1√ −-g ∑ μ νλτnx ξμ) , (163 ) ν 2 x λτμ x= {n,s}