“…for some integer M and scalar functions c j (θ, θ ). Notice now that, under assumption A1, the greatest common divisor of the two polynomials a(s, [30,Lemma 3] and conclude that for any θ = θ there exists at least one K i (actually infinitely many) such that the two characteristic polynomials ϕ i (s, θ) and ϕ i (s, θ ) are coprime, i.e., such that their resultant R i (θ, θ ) is different from zero. This, in turn, implies that, for any θ = θ , the vector c(θ, θ ) = [c M (θ, θ ), .…”