Equation Icon  | | ||˙ωk-|| ----|k2∕a2-+-2M-ξ-cos{M-(t-−-tos)}∕(t −-tos)|---- rna ≡ |ω2 | = M |k2∕a2 + m2 − 4M ξ sin{M (t − tos)}∕(t − tos)|3∕2, (3.55 ) k χ