Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Light-front time picture of the Bethe-Salpeter equation fermionic   The reduction of the equation of Bethe-Salpeter of two fermions in front of
light is studied for the Yukawa model. We use the light-front Green's function
for the N-particle system for two-fermions plus N-2 intermediate bosons.

8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs