Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the limiting absorption principle and spectra of quantum graphs   The main result of the article is validity of the limiting absorption
principle and thus absence of the singular continuous spectrum for compact
quantum graphs with several infinite leads attached. The technique used
involves Dirichlet-to-Neumann operators.

24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an