Equation Icon  ¯ ¯ a ¯ L (uB,ζ,ζ ) = ∂ (τ)G (τ,ζ,ζ) = ξ (τ)ˆma (ζ,ζ), (87 ) uB = ξa (τ )ˆla(ζ, ¯ζ). (88 )