Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: Models of quasi-periodic oscillations related to mass and spin of the
  GRO J1655-40 black hole
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn