Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Discrete Nonlocal Nonlinear Schroedinger equation on Metric Graphs:
  Dynamics of PT-Symmetric Solitons in Discrete Networks   We consider PT-symmetric, discrete nonlocal nonlinear Schr\"{o}dinger
equation on metric graphs. Soliton solutions are obtained for simplest graph
topologies, such as star and tree graphs. Integrability of the problem is shown
by proving existence of infinite number of conservation laws.

29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex