Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Similarity Solutions of the Einstein-Maxwell equations with 1 Killing
  Vector   New similarity variables are introduced for the Einstein - Maxwell equations
with one Killing vector that reduce the non-linear partial differential
equations in three independent variables to ordinary differential equations.
These similarity variables are the extensions of those previously found for the
Einstein-Maxwell equations with two Killing vectors. The resulting equations
are then solved, providing new solutions of the Einstein - Maxwell equations
with one Killing Vector.

33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex