“…n , Ax(0) + λCx(T ) = d, det C = 0, λ ∈ R, x 1 (0) = x 10 ,the PBVPs with nonfixed right boundary : dx dt = f (t, x), t ∈ [0, λ], x, f ∈ R n , Ax(0) + Cx(λ) = d, det C = 0, λ ∈ (0, T ], x 1 (0) = x 10 , t, x), t ∈ [0, λ 2 ], x, f ∈ R n , λ 1 Ax(0) + Cx(λ 2 ) = d, det C = 0, λ 1 ∈ R, λ 2 ∈ (0, T ], x 1 (0) = x 10 , x 2 (0) = x 20 , and the PBVP of form t, x), t ∈ [0, T ], x, f ∈ R n , λ 1 Ax(0) + λ 2 Cx(T ) = d, det C = 0, λ 1 , λ 2 ∈ R, x 1 (0) = x 10 , x 2 (0) = x 20 ,The paper[9] deals with the two-point PBVP dx dt = f (t, x) + λ 1 g(t, x), t ∈ [0, T ], x, f ∈ R n , Ax(0) + λ 2 Cx(T ) = d, det C = 0, λ 1 , λ 2 ∈ R, x 1 (0) = x 10 , x 2 (0) = x 20 .…”