Cartan structure equations: Omega = d omega + omega ^ omega (so(n)-valued); Omega = R^a_b_c_d e^c ^ e^d / 2 in orthonormal-frame basis; satisfies Bianchi identity D Omega = 0.
Cartan structure equations: Omega = d omega + omega ^ omega (so(n)-valued); Omega = R^a_b_c_d e^c ^ e^d / 2 in orthonormal-frame basis; satisfies Bianchi identity D Omega = 0.