Equation Icon  -M--Jδ-- K (Ω) = δ2 − Ω2 , (501 ) 1 1 δ2 − Ω2 χexffx,dbl(Ω) = --------------= ------------------. (502 ) K (Ω ) − M Ω2 M Jδ − δ2Ω2 + Ω4