Equation Icon  e β′ e β′ e( β′ γ′ β′) β′ tail ∇ βA α(x) = − -2U αβ′u ∂βr + --Uαβ′;βu + -- Uαβ′;γ′u u + U αβ′a ∂βu + eVαβ′u ∂βu + A αβ(1(8x.)1,3 ) r r r