Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thin shells surrounding black holes in F(R) gravity   In this article, we consider spherical thin shells of matter surrounding
black holes in F(R) theories of gravity. We study the stability of the static
configurations under perturbations that conserve the symmetry. In particular,
we analyze the case of charged shells outside the horizon of non--charged black
holes. We obtain that stable static thin shells are possible if the values of
the parameters of the model are properly selected.

1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ