Equation Icon  [^nL integral + oo ] integral + oo F P [] -r1et --- dxQm(x)F (t - rx) = n^L dy F (- 1)(t- ry) r{ 1 integral 1 integral } y dPl- + oo dQl- × Ql(y) dx Qm(x) dx (x) + Pl(y) dx Qm(x) dx (x) , (106) 1 y