Equation Icon  [( 1 2m ) 1 ] ℳ ˆıˆτ1 = 1 + -ε2v21 − ε2---2 δij − -ε2vi1vj1 Dj1 − ε2M i1kvk1 + 𝒪 (ε3), (236 ) 2 r12 2 ˆıˆj ij 2 k [i j]k 3 ℳ 1 = M 1 + ε v1v1M 1 + 𝒪 (ε ). (237 )