Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nucleation Process in Asymmetric Nuclear Matter   An extended version of the non linear Walecka model, with rho mesons and
eletromagnetic field is used to investigate the possibility of phase
transitions in hot (warm) nuclear matter, giving rise to droplet formation.
Surface properties of asymmetric nuclear matter as the droplet surface energy
and its thickness are also examined.

15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org