Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 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.

16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn