Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational phase transition of self-gravitating systems of fermions
  in General Relativity   The Thomas-Fermi model is extended at finite temperature, to describe the
gravitational phase transition occurring in massive fermionic systems in a
general-relativistic framework. It is shown that, when a nondegenerate
fermionic gas (for $N < N_{OV}$, where $N_{OV}$ is the Oppenheimer-Volkoff
limit) is cooled down below a critical temperature, a condensed phase emerges
and the gravitational collapse is prevented by quantum mechanics. If $N >
N_{OV}$, by contrast, the system is destined to collapse towards a Black Hole
because no equilibrium states exist.

27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an