The Clifford algebra Cℓ 2,0 ( R ) is built up from a basis of one unit scalar, 1, two orthogonal unit vectors, σ 1 and σ 2, and one unit pseudoscalar i = σ 1 σ 2. From the definitions above, it is evident that (σ 1) = (σ 2) = 1, and (σ 1 σ 2)(σ 1 σ 2) = − σ 1 σ 1 σ 2 σ 2 = −1.