In their recent paper, Aktosun, Klaus, and van der Mee considered the problem of factorization of the scattering matrix for the one-dimensional Schrödinger equation and two of its generalizations (wave propagation in a nonhomogeneous medium and wave propagation in a nonconservative medium), and the related problem of decomposition of a potential into fragments. Our first comment is to point out that [...]

Sassoli de Bianchi, M. (1997). Comment on “Factorization of scattering matrices due to partitioning of potentials in one-dimensional Schrödinger-type equations” [J. Math. Phys. 37, 5897 (1996)]. J. Math. Phys. 38, pp. 4882-4883. Doi: 10.1063/1.532132.