Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electric force lines of the double Reissner-Nordstrom exact solution   Recently, Alekseev and Belinski have presented a new exact solution of the
Einstein-Maxwell equations which describes two Reissner-Nordstrom (RN) sources
in reciprocal equilibrium (no struts nor strings); one source is a naked
singularity, the other is a black hole: this is the only possible configuration
for separable object, apart from the well-known extreme case ($m_i=e_i$).
  In the present paper, after a brief summary of this solution, we study in
some detail the coordinate systems used and the main features of the
gravitational and electric fields. In particular we graph the plots of the
electric force lines in three qualitatively different situations: equal-signed
charges, opposite charges and the case of a naked singularity near a neutral
black hole.

36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
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
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph