Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two particles on a star graph II   We consider a two particle system on a star graph with delta-function
interaction. A complete description of the eigensolutions with real momenta is
given; specifically it is shown that all eigensolutions can be written as
integrals in the momentum plane of sums of products of appropriate one particle
solutions.

10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an