Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Exact Interior Kerr Solution   We present a simple exact solution for the interior of a rotating star. The
interpretation of the stress energy tensor as that of a fluid requires the
existence of a high viscosity, which is quite expected for a rotating fluid. In
spite of the negative stresses, energy conditions are in fact all satisfied.

0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat