((∫_x^y)(Subscript[S, m]^1)(Subscript[p, m])(t)exp(j 2π(1/T)(m-k)t) dt+(∫_y^(x+T))(Subscript[S, m]^2)(Subscript[p, m])(t) exp(j 2π(1/T)(m-k)t)dt≠0.Equation   (60))