Equation Icon  0 ¯ ¯¯ --- ¯¯ --- μ (τ,ζ,ζ) = uB − L ζ = X −-ζ∂(τ)X, (358 ) μ1(τ,ζ, ¯ζ) = ¯L + ζuB = ¯∂(τ)X + ζX. (359 )