Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stability of Cauchy Horizon under perturbations   We use perturbations in order to study the stability of the Cauchy Horizon in
a Reissner-Nordstr\"om space-time. The perturbations are either scalar or
gravitational, and indicate some strong instabilities.

12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ