Zubkova, E.I.; Rofe-Beketov, F.S.
(Журнал математической физики, анализа, геометрии, 2009)
The characteristic properties of the scattering data for the Schr¨odinger operator on the axis with a triangular 2 × 2 matrix potential are obtained. A difference between the necessary and sufficient conditions for solvability ...