Equation Icon  uB = G (τ,ζ, ¯ζ) = ξa(τ)ˆlaζ,ζ¯+ ξij(τ)Y20ij + ... (261 ) ξ0(τ) 1 = -√--- − --ξi(τ)Y 01i + ξij(τ)Y20ij + ... 2 2