Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Axisymmetric stability criterion for two gravitationally coupled
  singular isothermal discs   Using the two-fluid formalism with the polytropic approximation, we examine
the axisymmetric stability criterion for a composite system of gravitationally
coupled stellar and gaseous singular isothermal discs (SIDs).

22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org