Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "Attractive Forces between Electrons in 2 + 1 Dimensional
  QED"   It is shown that a model recently proposed for numerical calculations of
bound states in QED$_3$ is in fact an improper truncation of the Aharonov-Bohm
potential.

37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an