Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Maximum bounds on the surface redshift of anisotropic stars   It is shown that for realistic anisotropic star models the surface redshift
can not exceed the values 3.842 or 5.211 when the tangential pressure satisfies
the strong or the dominant energy condition respectively. Both values are
higher than 2, the bound in the perfect fluid case.

15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga