Equation Icon  ⊕ ⊕ 𝔨ℂ = 𝔱ℂ ⊕ ℂ E ⊕ ℂ (E + θ(E )), α α α α∈⊕Δ0,+ α∈Δ⊕∖Δ0 (6.166 ) 𝔭ℂ = 𝔞 ℂ ⊕ ℂ E α ⊕ ℂ (E α − θ(Eα )). α∈Δ 0,− α∈Δ ∖Δ0