Equation Icon  dim 𝔥3 ℒ = ∑ ∂ φ(i)(x)∂ φ (i)(x) + ∑ e2α(φ)[∂ χ(α)(x ) + ⋅⋅⋅] [∂ χ(α)(x ) + ⋅⋅⋅] , (5.45 ) 𝒰3∕𝒦(𝒰3) x x x x i=1 α∈Δ+