Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bianchi type-II cosmological model: some remarks   Within the framework of Bianchi type-II (BII) cosmological model the behavior
of matter distribution has been considered. It is shown that the non-zero
off-diagonal component of Einstein tensor implies some severe restriction on
the choice of matter distribution. In particular for a locally rotationally
symmetric Bianchi type-II (LRS BII) space-time it is proved that the matter
distribution should be strictly isotropic if the corresponding matter field
possesses only non-zero diagonal components of the energy-momentum tensor.

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The categories of this paper are: physics
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
16
The categories of this paper are: stat
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The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: math
15
The categories of this paper are: nucl-ex