Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectral/timing evolution of black-hole binaries   I briefly outline the state-paradigm that has emerged from the study of
black-hole binaries with RossiXTE. This is the starting point of a number of
studies that address the connection between accretion and jet ejection and the
physical nature of the hard spectral components in these systems.

27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex