Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hydrodynamic flow from RHIC to LHC   The hydrodynamic model for the expansion of the fireball in relativistic
heavy-ion collisions is presented. Calculations using relativistic
hydrodynamics of a fluid with small viscosity yield a satisfactory description
of the experimental data on the particle spectra, the elliptic flow or the
interferometry radii.

17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
2
The categories of this paper are: math