Equation Icon  ik 2 2 2 (| DdV |(m + 4d) + |DdV |(m))e ym+4d(f)- 2(2 + k g d )| DdV |(m)ym(f) + (|D V |(m - 4d) + |D V |(m))e-iky (f) = - 32p-Gg3d3l2 H^ (m)y (f) (50) d d m-4d 3 P matter m