Equation Icon  3m1 δi ⟨ik⟩ 3m2 δi ⟨ik⟩ d2δi m1ai1|δAΘ = − ε6---32Θ-n12 + ε6---3-1Θ-n12 − ε6---12Θ. (166 ) r12 r12 dτ