Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the relationship between charge and mass in General Relativity   This paper demonstrates a relationship between mass and charge through
explicit construction of exact Einstein-Maxwell spacetimes by embedding the
Schwarzschild and Kerr instantons in 5 dimensions. It is shown further how by
varying only the mass of an object, its electric field or apparent "charge"
changes, while making it possible for two different mass values to yield the
same electric field strength. The 5-dimensional solution, however, reduces to
the familiar Coulomb limit $1/r^2$ for large distances.

11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph