Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-gravitating charged fluid spheres with anisotropic pressures   The coupled system of the spherically symmetric Einstein--Maxwell
differential equations is solved under two different source conditions:
non-zero electric charge and pressure anisotropy. Expressions for the metric
functions, and pressures which extend the Tolman VII exact solution are deduced
from the new solutions. By applying boundary conditions to these solutions, all
integration constants are computed in terms of parameters that are physically
meaningful.

27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs