Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High frequency QPOs: nonlinear oscillations in strong gravity   Some of the more promising ideas about the origin of the high frequency
variability (kHz QPOs) in the observed X-ray emissions of low-mass X-ray
binaries are contrasted with less promising ones.

30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th