Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A 2D Luttinger model   A detailed derivation of a two dimensional (2D) low energy effective model
for spinless fermions on a square lattice with local interactions is given.
This derivation utilizes a particular continuum limit that is justified by
physical arguments. It is shown that the effective model thus obtained can be
treated by exact bosonization methods. It is also discussed how this effective
model can be used to obtain physical information about the corresponding
lattice fermion system.

8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin