“…Suppose that the system (1) has the form (5), i.e., the equalities (6), (7), (8) are fulfilled. Suppose that the matrices of the system (5) (i.e., of the system (2.4) of [29]) have the form (1.6), (1.7), (2.5) of [29], that is the matrix A has the lower Hessenberg form with nonzero superdiagonal entries (i.e., the form (10)), the first p − 1 rows of the matrix B and the last n − p rows of the matrix C are equal to zero, and P j (j = 1, s) have the form (11). Then the matrices (6), (7) will satisfy the form (10), (11).…”