1307.5084 (R. G. Novikov et al.)

The Moutard transformation and two-dimensional multi-point delta-type
potentials    [PDF]

R. G. Novikov, I. A. Taimanov

In the framework of the Moutard transformation formalism we find multi-point delta-type potentials of two-dimensional Schrodinger operators and their isospectral deformations on the zero energy level. In particular, these potentials are "reflectionless" in the sense of the Faddeev generalized "scattering" data.

View original: http://arxiv.org/abs/1307.5084