Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the coexistence of phases in a Lennard Jones liquid:first results   The aim of this paper is to investigate the conditions for the coexistence of
phases in a Lennard Jones fluid. The calculation has been performed within the
virial developement mathod and, as a result, a simple approximate relation has
been obtained between the number densities of two coexisting densities and the
interparticle potentials in them. The calculation is preliminary,in the sense
that it does not take into account the equality of the chemical potentials. The
results of this work may have implications for modelling of the giant planets.
More than 300 exoplanets have been discovered, so this has become more
important than ever.

4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys