Equation Icon  [^nL integral + oo ] integral +o o F P [] -r1et --- dx Qm(x)F (t- rx) = ^nL dy F(-1)(t- ry) r { 1 i ntegral 1 integral } y dPl- + oo dQl- × Ql(y) dx Qm(x) dx (x) + Pl(y) dx Qm(x) dx (x) , (112) 1 y