Equation Icon  ⌊ ⌋ [ 8 ] 𝒱(xμ) = Exp ∑ φ(i)(xμ)α∨ Exp ⌈ ∑ χ(γ)(xμ)E ⌉ ∈ ---SO--(8,24)---, (7.30 ) i γ SO (8) × SO (24) i=1 γ∈Δ+