Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropic Spheres with Barotropic Equation of State in Bimetric Theory
  of Relativity   Recently, Khadekar (2007) presented the solutions with uniform energy density
for anisotropic spheres in bimetric theory. We present here a general analytic
solution to the field equations in bimetric theory for anisotropic fluids for a
general barotropic equation of state by representing equations in terms for
effective radial pressure . We list and discuss some old and new solutions
which fall in this category.

2
The categories of this paper are: math
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc