“…Proof Considering the lemma on eigenvector matrix in [26] obtains combined with A c ( θ , y ) in (), the generalized Sylvester equation is given as with then using the solution of generalized Sylvester equation in [35], V ( θ , y ) and W c ( θ , y ) are given in (), further, based on () and (), K ( θ , y ) can be obtained in () easily. This completes the proof.…”