Equation Icon  L (uB,ζ,ζ¯) = ∂ (τ)G (τ,ζ, ¯ζ), (3.12 ) ¯ ¯ uB = G (τ,ζ,ζ) ⇔ τ = T (uB,ζ,ζ). (3.13 )