Inverse scattering theory for discrete Schr\"odinger operators on the   hexagonal lattice
  We consider the spectral theory for discrete Schr\"odinger operators on the hexagonal lattice and their inverse scattering problem. We give a procedure for reconstructing the compactly supported potential from the scattering matrix for all energies. The same procedure is applicable for the inverse scattering problem on the triangle lattice. 
Kazunori Ando
math.SP