Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Virial masses of galaxy clusters in the post-Newtonian limit   We estimate virial masses of galaxy clusters using the parametrized
post-Newtonian (PPN) virial theorem. Also, we show explicitly that
post-Newtonian corrections can not address the mass discrepancy in the galaxy
clusters.

30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex