Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Curvature-induced phase transition in three-dimensional Thirring model   The effective potential of composite fermion fields in three-dimensional
Thirring model in curved spacetime is calculated in linear curvature
approximation. The phase transition accompanied by the creation of non-zero
chiral invariant bifermionic vector-like condensate is shown to exist. The type
of this phase transition is discussed.

24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math